| Subject | Date Asked |
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| Power | 11/19/2009 |
Q: A 50.0Kg student climbs 5.00m up a rope at a constant speed. If the student's power output is 200.0 ...
A: This is how you may attempt this problem : Let the student take 't' seconds to climb the rope. ...
|
| density | 11/18/2009 |
Q: How wil you calculat the density of Chlorine gas at 250kPa & 20C?
A: Here is how you may proceed : At STP one mole of any gas occupies 22.4 L space. P = 101300 Pa V = ...
|
| How does sound travel | 10/26/2009 |
Q: My question is how does sound travel through the air? Is it like a radio wave? And is sound inside a ...
A: Sound travels in air in form of vibrations ( waves )which are produced by the source of sound. For ...
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| physics question | 9/10/2009 |
Q: A physics instructor drives down to St. Louis to see his mom. On the way there, he travels the first ...
A: Here is the solution : Average speed = { 65*(t/2) + 100*(t/2) }/t = {65+100}/2 Km/hr ...
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| Physics 12 | 6/18/2009 |
Q: Outside the International Space Station, a 60 kg astronaut holding a 4.0 kg object (both initially ...
A: Applyin law of conservation of linear momentum : 60 * 0 + 4 * 0 = 60 * V + 4 * 10 V = - 40/60 = - ...
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| Waves | 5/13/2009 |
Q: If I fix a string to a wall and flick my wrist,a wave will be sent down the "line"/string.When it ...
A: If the reflection occurs from a rigid surface like wall, then the phase does change of 90 degee does ...
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| Total internal reflection | 5/4/2009 |
Q: I'm having trouble with one of my online quizes question. I understand total internal reflection ...
A: options (A) and (C) are correct. For toal internal reflection to occur,beam must enter from denser ...
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| Centripital Motion | 5/4/2009 |
Q: Your hard drive can spin up to 7500 rpm from rest in 5 s. If your hard drive's mass is 40 g and its ...
A: w'= 7500 rpm = (7500*2pi)/60 rad/s = 786 rad/s w'= w + alpha.t alppha = (w'-w)/t = (786 ...
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| Boyles Law | 3/31/2009 |
Q: 2 vessels of unequal volume and pressure filled with the same gas and connected by a thin tube with ...
A: Let capacity of on vessel be V, mass of gas in it be m Let capacity of the other be V', mass of gas ...
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| work done against magnetic field | 3/27/2009 |
Q: The conducting rod in the diagram below is 0.75 m long and is moved at a speed of 4.5 m/s ...
A: There is no diagram with your question.There is no attachment.However, I am answering the question ...
|
| electroscope | 3/27/2009 |
Q: A positively charged rod is held near the sphere of a neutral electroscope. a.What happens to the ...
A: Here is answer to thisa) Leaves diverge as both leaves get positive induced charge.This is ...
|
| Magnetic field | 3/25/2009 |
Q: An electron particle is accelerated by a potential difference of 2.33 x 10^3 V as it travels ...
A: eV = 1/2mv^2 .......... ( v and V are respectively velocity of electron ...
|
| Magnetics help needed right away ( using left hand rules)? | 3/24/2009 |
Q: Can someone explain question 16 on this page : http://www.studyphysics.ca/30/phys30_jan02_de.pdf ...
A: Someone (?) answers this question for you: If we hold forefinger,middle finger and thumb of the ...
|
| electric field | 3/17/2009 |
Q: A 2.5uC charge is placed 10.0 cm from a 7.0uC charge. At what point between the 2 charges would the ...
A: Consider a positive test charge q at a point x m from the first charge on the line joining the two ...
|
| lightnings | 3/16/2009 |
Q: researchers have found that lightning consists of both downward and return (upward) strikes. A ...
A: Wavelength of red sprites = 6.8 x 10^-7m frequency = c/wavelength = 3*10^8/6.8*10^-7 ...
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| electric potential | 3/16/2009 |
Q: an investigation is performed using a apparatus. Electrons are accelerated from rest from the ...
A: Bev = eE Bv = E B = E/v = (V/d)/v = (12/0.03)/v = 400/2.10x10^7 = 190 x 10^-7 = 1.9 x ...
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| electricity | 3/15/2009 |
Q: If a person is out in the open in a thunderstorm, he might feel the hair on his arms and neck stand ...
A: This is due to induction. Suppose a positively charged cloud is overhead.This induces charge on ...
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| Magnetic Fields | 3/12/2009 |
Q: A proton travels through uniform magnetic and electric fields. The magnetic field is in the negative ...
A: e(v cross B) is force in +z direction and also eE in the same direction in (a). Thus net F = evB + ...
|
| Batteries | 3/8/2009 |
Q: My question involves batteries/dry cells. Does a dead battery weigh less than a fresh one? If not, ...
A: A dead battery has simply exhausted its useful contents.For example a lead accumulator develops ...
|
| help plz | 3/6/2009 |
Q: I’ve some questions Can u help me with them please? Q1. One car travels due east at 40Km/h, and ...
A: One question at a time,please. Q1 No. Their velocities are not equal, only the magnitudes are equal ...
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| Physics | 3/5/2009 |
Q: 1. A stone is thrown horizontally at a speed of 5.0 m/s from the top of a cliff that is 78.4 m high. ...
A: I am answering first of these three questions for now. 1(a) h = ut + 0.5xgxt^2 = 0 x t + 4.9 t^2 ...
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| Physics | 3/4/2009 |
Q: My name is Jarrin - and I am 16yrs old. How can I design an experiment at home to prove that the ...
A: I suppose you are asking about acceleration due to gravity. You may drop balls of different masses ...
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| Mass-spring system | 2/27/2009 |
Q: A spring is mounted at an angle of theta = 33degrees on a frictionless incline as illustrated in the ...
A: P.E. = (1/2)K x^2 = 0.5 x 575 x 0.15 x 0.15 J P.E. of Spring = K.E. of mass 0.5 x 575 x 0.15 x ...
|
| Physics (Friction and Forces) | 2/25/2009 |
Q: Book : Physics Principle and Problems from Glencoe Science 19. Mr. Ames is dragging a box full of ...
A: 19) F = coefficient of static friction x normal reaction = 0.55 x 134 N 22) Kinetic friction = ...
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| problem | 2/23/2009 |
Q: sir, i am a student of class 9th and i have a question for you:- a stone is allowed to fall from the ...
A: Let them meet after t seconds, at a height of h metre. 100 - h = ut + 0.5 t^2 100 - h = 0 x t + 0.5 ...
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| statics | 2/22/2009 |
Q: what is moment of force?A tricycle weighing 200 N has a small wheel symmetrically placed 500 mm in ...
A: Let R be reaction of ground on front wheel. Let R' be reaction of ground on two rear wheels. For ...
|
| fluids | 2/21/2009 |
Q: The viscosity of liquids decreases with temperature while it increases in the case of gases. Why is ...
A: Viscosity in gases arises principally from the molecular diffusion that transports momentum between ...
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| Heat capacity | 2/20/2009 |
Q: A level- sixth form. A piece of copper of mass 170g is cooled in a freezer.It is then dropped into ...
A: Level sixth form ? This ? Heat lost by freezing water = mL = 4 * 336 J ...
|
| Work Done | 2/20/2009 |
Q: A crate of mass 28 kg is pushed up a ramp by a person, at a 30 degree angle. Assume the coefficient ...
A: Force needed to move it up = mg sinx + u mg cosx = F u = coefficient of dynamic friction mg sinx = ...
|
| physics | 2/19/2009 |
Q: a person throws a ball up vertically at an initial speed of 13 m/s. (neglect air friction). what ...
A: Acceleration is constant and it is 9.8 m/s^2 even at the highest point when the velocity is zero. ...
|
| Question about transverse waves | 2/17/2009 |
Q: I was wondering if you could help me understand why transverse waves work. I find longitudinal ...
A: When a particle of a continuous elastic medium is forced to move periodically up and down (simple ...
|
| Rearranging Physics Formula | 2/16/2009 |
Q: I have a rather easy question for you but for me, I find it hard to picture the rearranging of ...
A: d = vi t + 0.5 t^2 25 = 20 t + 1/2 t^2 50 = 40 t + t^2 t^2 + 40t - 50 = 0 This is a quadratic ...
|
| physics NYC - waves | 2/9/2009 |
Q: The pendulum of a pendulum clock consists of a 0.99m long rod with a bob of mass 0.40kg. the ...
A: (a) Maximum velocity is at mean position : v max = wA = (g/L)^1/2 x amplitude = ...
|
| Physics question | 2/8/2009 |
Q: a 0.80 kg cart rolls down a frictionless hill of height 0.32 m. At the bottom, the cart rolls on a ...
A: Kinetic energy of cart at the bottom of incline = potential energy at the top 1/2mV^2 = mgh V^2 = ...
|
| physics | 2/7/2009 |
Q: The laser used in cornea surgery to treat corneal disease is the excimer laser, which emits ...
A: Refractive index = speed of light in air/speed in medium n = c/c' c = f * wavelength in air c' = f ...
|
| HELP!!! I don't understand! | 2/3/2009 |
Q: my name is Sarah and I am a senior in high school. I am taking physics this year along with a few ...
A: Length of ark = 300 cubits = 300*6 palms = 300*6*8 cm = ...
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| mass and energy | 1/29/2009 |
Q: As mass is the form of energy, does compressed spring have more mass than a relaxed spring? ANSWER: ...
A: According to Einstein's mass-energy relation E=mc^2 , mass can me converted into Energy.This happens ...
|
| please help asap | 1/28/2009 |
Q: A quarterback throws the football to a stationary receiver who is 31.5 meters down the field. If the ...
A: Let the initial speed of the ball be u m/s Horizontal component of initial velocity = u.cos40 ...
|
| Electric Forces | 1/27/2009 |
Q: A small plastic ball of mass 6.90 multiplied by 10-3 kg and charge +0.150 µC is suspended from an ...
A: Would you please let me know name and source of the software used for making this figure? Thanks. ...
|
| Work and Power | 1/19/2009 |
Q: A truck tows a trailer of mass 1200kg at a speed of 10m/s on a levelled road. The tension in the ...
A: How are you? I hope you are doing well. Here is answer to yourPower expended on trailer = F.d ...
|
| Hi pls help on my physics | 1/18/2009 |
Q: A missile is fired with a launch velocity of 18,000 ft/s at a target 1400 mile away. At what angle ...
A: Here is answer to your question. Let the angle of projection be x.This is the angle that the ...
|
| Thermodynamics | 1/17/2009 |
Q: When we heat a gas it expands due to which the internal energy increases which leads to a rise in ...
A: The temperature of the gas increases due to the heat supplied to the gas.Rise in temperature is due ...
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| intermolecular forces | 1/17/2009 |
Q: sir, i am venky,studying 2nd year mechanical engineering,andhrapardesh,india. sir,i know the types ...
A: Here are answers to your questions: 1. Attraction or repulsion depends on average distances ...
|
| physics | 12/26/2008 |
Q: respected sir, my question is: when a lift of mass 'm' is descending with acceleration 'a', why is ...
A: In this situation the net force on person in the lift is calculated as follows: weight of person - ...
|
| motion | 12/22/2008 |
Q: I was wondering why it so happens that when an object like a car is moving speedily, even a tiny ...
A: Here is answer to your interestingLet mass of pebble be m Speed of pebble moving towards windscreen ...
|
| Laws Of Motion | 12/19/2008 |
Q: Respected sir, I am mukul of class 11 1)Please check whether the following is true or not: action ...
A: 1) First statement is allright. 2) Apparent weight can be calculated. Let lift descend with ...
|
| physics | 12/18/2008 |
Q: if a person kicks a ball at a angle of 60 degree with a velocity of 22 am/s, how far does it go?
A: 60 degree with horizontal ? Vertical component of initial velocity = 22 sin60 m/s v = u + gt 0 = 22 ...
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| Physics- box resting on a moving car | 12/9/2008 |
Q: A 5.0 kg box is resting on the back seat of a car traveling at 30 m/s. The driver slams the brakes ...
A: Acceleration produced in the car, a v = u + at 0 = 30 + a*6 a = - 5 m/s^2 Acceleration of the box ...
|
| Pipes-Chapter Fluids | 12/5/2008 |
Q: I got one question on fluids regarding pipe. Kindly take a look at it. PLease thanks! Q:The water ...
A: I was unable to read value of height in the figure that you attached with your previous mail.I had ...
|
| Hey | 12/5/2008 |
Q: Sir, I have a question, would you please take a look at it. Thanks A paperweight, when weighed in ...
A: Upthrust = weight of water displaced = weght in air - weght in water = 7.5 - 4.3 ...
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| Pipes-Chapter Fluids | 12/4/2008 |
Q: I got one question on fluids regarding pipe. Kindly take a look at it. PLease thanks! Q:The water ...
A: In the figure the height of the level of water at 2(in the bulb)from the point 1(valve) is not quite ...
|
| Physics | 11/29/2008 |
Q: Two identical cars (m = 1350 kg) are traveling at the same speed of 25.0 m/s. They are moving in the ...
A: Here is answer to yourThe figure is not showing the angles very clearly.However,I am preparing the ...
|
| Sound Interference | 11/25/2008 |
Q: 2 speakers are connected to a frequency generator so that they emit waves at the same frequency. How ...
A: If waves from the two sources arrive at point with a path difference of one wavelength, there will ...
|
| please help | 11/22/2008 |
Q: Ms. Jones has attached a sign that has a weight of 495N to a wall outside her office. The chain ...
A: I have made a mental picture of the situation and accordingly the calculations should be as follows: ...
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| please help asap | 11/22/2008 |
Q: A traffic light is supported by two wires 80 degrees apart. The traffic light has a weight of 600 ...
A: Sketch a figure showing two strings inclined at an angle of 80 degrees to each other and supporting ...
|
| Fluids | 11/21/2008 |
Q: Hey Mr. Suresh, hope your doing fine. I just needed help on this question, I request you to kindly ...
A: a) Pressure due to 6.4 m column of water = hdg = ...
|
| equation of motion | 11/20/2008 |
Q: a balloon is ascending with the velocity of 20m/s, when it reaches heght of 15 m a stone falls from ...
A: Remember,the particle which is released from the rising balloon will have same initial velocity as ...
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| change in mass of earth | 11/19/2008 |
Q: is the mass of the earth increasing with the increase in the population?will it effect its angular ...
A: A new born baby is constituted of elements available to mother from food which she takes in.The food ...
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| Physics Gr.11 | 11/18/2008 |
Q: I'm having a hard time understanding this question. Why is the average speed always greater than ...
A: Consider rectangle ABCD.Let AB and BC respectively be 4 and 3cm.From Pythagoras theorem AC is 5cm. ...
|
| physics 1 | 11/18/2008 |
Q: a toy car runs off the edge of a table that is 1.275 m high. the car lands 0.425 m from the base of ...
A: Please folloow-up to let me know the grade you are in. Here is answer to yourInitial vertical ...
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| Force and acceleration | 11/15/2008 |
Q: When taking off, fully loaded the mass of the plane is 2560kg.The two jet engines can exert a total ...
A: 1) As the plane accelerate velocity increases which causes the rise in the viscous force due ...
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| 11th grade Physics | 10/31/2008 |
Q: The coefficient of sliding friction between a 78-kg box and a warehouse floor is 0.21. How much ...
A: To keep the box moving with constant speed the applied force must be equal to the the dynamic ...
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| What is the definition of final speed? | 10/30/2008 |
Q: What is the definition of final speed? Need 2 know for my 9th grade Mid term.TY very much
A: If a force begins to act on a body,the body begins to increase its velocity at constant rate called ...
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| Hey! | 10/29/2008 |
Q: I need help on this question sir. I tried it many times but I am not able to get it. IT would be ...
A: Velocity of bullet = 7.70*102 = 785 m/s mu + MU = (m+M)V M = mass of block u = ...
|
| inclined plane | 10/27/2008 |
Q: you place a box weighing 236.1 N on an inclined plane that makes a 44.5 degree angle with the ...
A: The weight along the inclined plane = mgsin44.5 N = 236.1*0.7 ...
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| physics | 10/26/2008 |
Q: A 1055 kg van, stopped at a traffic light, is hit directly in the rear by a 690 kg car traveling ...
A: Let M1 and M2 be masses of first(van) and secon(car) body respectively, V1 and V2 be initial ...
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| Momentum | 10/24/2008 |
Q: I've been trying to do this problem, but I'm not able to come to the right solution. If you could ...
A: Here is answer to your question; Force = {mv - mu)/t =45(-18 -18)/1 = - 1620 N Force ...
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| Momentum | 10/24/2008 |
Q: Hey Sir, I am having a hard time solving this problem. If you would explain it for me,I would really ...
A: Here is answer to yourForce = rate of change of momentum =(final momentum - initial ...
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| Projectile Motion | 10/22/2008 |
Q: I know you only help highschool students but I do not think that this is to high of a level of ...
A: Break up the initial velocity in two components, horizontal and vertical: Ux = 26 cos 45 ...
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| How much friction force must the brake apply to the rim to bring the disk to a halt in 3.0 s? | 10/16/2008 |
Q: The 2.2 kg, 40 cm diameter disk in the figure below is spinning at 380 rpm. How much friction force ...
A: Moment of inertia of disk = (MR^2)/2 = 2.2*0.2^2/2 ...
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| Rotational Motion | 10/15/2008 |
Q: Respected sir, I have a few questions: We say that the earth's revolution around the earth is due to ...
A: Rotation of earth on its axis with constant angular velocity is a perfect example of a body being in ...
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| Rotational Motion | 10/14/2008 |
Q: Respected Sir, I have a few questions for you: 1)My physics book says that when we switch on the ...
A: 1) Yes, it is correct 2) This question is not clear.(moment of mass?) 3) Yes,it is correct.There is ...
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| Physics | 10/12/2008 |
Q: Why sky appears blue?
A: The colour of the object is the colour that it reflect to the eyes. There are seven ...
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| apparant weight , elevator | 9/20/2008 |
Q: can you please tell me how the reaction of the floor on the person in the elevator which is moving ...
A: Nornally when we stand on ground mg = R ,gravtational force mg is equal to the reaction R of the ...
|
| momentum | 9/17/2008 |
Q: Which should be the best on knocking the bear down- a lead bullet or a rubber bullet with the same ...
A: That is an interesting question. Since the two bullets have the same momentum,the impulse Ft: Ft = ...
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| Falling Objects (neglected air resistance) | 9/13/2008 |
Q: I am a High School student taking a Physics course. I am stuck in the following question and would ...
A: Apply third equation of motion: v^2 = u^2 + 2gh intial velocity is u = v' v is velocity after ...
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| friction | 9/9/2008 |
Q: sir we were doing this practical in physics of finding the coeeficient of static friction using an ...
A: 1) The angle of response depends on the nature of two surfaces in contact and not on the weight of ...
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| spring constant and elastic potential energy | 9/8/2008 |
Q: A marble placed on a compressed spring, moves up when the spring is released. Will the marble move ...
A: Elastic poential energy stored in a compressed spring is 1/2Kx^2. Where K is force constant and x ...
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| physics | 9/5/2008 |
Q: mike is on the roof looking for his toy. he slips and falls off. at the same instant as he falls, i ...
A: Here is answer of this interestingLet us assume that Mike was h metre off ground.h is also the ...
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| physics | 8/29/2008 |
Q: we know that green is the primary colour but it can be made with blue and yellow colour so why it is ...
A: Yes, spectral green colour is primary and cannot be obtained by mixing any other spectral colours ...
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| conductor | 8/23/2008 |
Q: why is metal cold?
A: One feels cold on touching metallic objects because the heat flows from the fingers to the metal ...
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| physics | 8/21/2008 |
Q: a sailor's compass says that the ship is traveling North 55 degree West, and the ship sextant says ...
A: Here is answer to your question. Time taken by dart to reach the board = 2/15 s Let the dart fall ...
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| physics | 8/21/2008 |
Q: a sailor's compass says that the ship is traveling North 55 degree West, and the ship sextant says ...
A: Answer to your question requires lengthy calcilation.However,I am trying to answer it.Here is answer ...
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| physics | 8/16/2008 |
Q: a sailor's compass says that the ship is traveling North 55 degree West, and the ship sextant says ...
A: Let its speed be v. Then, v*cos35degree=(35/6) v = (35/6)/cos35 = 7.12 miles/hr I have ...
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| gravitation | 8/12/2008 |
Q: sir what will be the change in weight of a body lyning on the surface of earth if earth stop ...
A: A body lying on the surface of the earth has wight mg directed towards the centre of the earth. The ...
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| physics | 8/11/2008 |
Q: what is the purpose of fictional force
A: Friction is nuisance because it is responsible for wear and tear in expensive automobile ...
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| Momentum and collision question | 8/9/2008 |
Q: Scientist, I hope you can help me find the proper simple equation that can help my students find ...
A: The velocity of the ball is given by the following formula(for elastic collision): In all these ...
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| high school physics | 8/6/2008 |
Q: what is inertia? how is it involved in newtons first law of motion?
A: The property due to which the body maintains its state of rest(inertia of rest) or uniform motion ...
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| circular motion | 8/4/2008 |
Q: sir i want to ask when a stone tied to one end of a string and whirled around in the horizontal ...
A: The horizontal component of the tension, which is always directed towards the centre of the circular ...
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| apparent weight | 7/29/2008 |
Q: . can u please explain me the term apparent weight thoroughly that how it acts in moving elevator ...
A: Here is answer to your question. Consider yourself standing on ground.Gravitational force mg(acting ...
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| physics | 7/24/2008 |
Q: what are the examples of investigatory project in physics?
A: Here is an example of an investigatory project. Study of splashes and patterns of drops of blood ...
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| pls send me answer to this questions | 7/23/2008 |
Q: Q . the photograph of a house occupies an area of 1.75cm2 an a 35mm slide the slide is projected ...
A: Here is solution to your problem. Square of magnification is equal to the ratio of area of house on ...
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| physics | 7/21/2008 |
Q: the pulley arrangements of a and b are identical the mass of the rope is identical.in a the mass m ...
A: Here is solution of this problem.Let the tension in the string in first case be T and acceleration ...
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| physical science | 7/19/2008 |
Q: Two tuning forks are struck at the same time. One tuning fork has a frequency of 20 Hz while the ...
A: Beat frequency = difference in frequencies of tuning forks. = 206 Hz No beats will be ...
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| physical science | 7/19/2008 |
Q: There is a delay of 5 seconds between the time you see a flash of lightning and hear the thunder. ...
A: The velocity of sound at 20 degree celcius = 0.6*20 + 332 ...
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| physics | 7/18/2008 |
Q: A BODY IS THROWN IN THE UPWARD DIRECTION .IT REACHES A CERTAIN HEIGHT AND COMES BACK TO THE SURFACE ...
A: Draw two mutually perpendicular lines as y and x axes. Take a point P on y-axis and Q on ...
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| inertia | 7/18/2008 |
Q: define inertia? on what factor does it depends upon? is there any formula to find inertia of a ...
A: Inertia is ability of a body to maintain its state of rest or uniform motion along a straight ...
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| Physics high school | 7/14/2008 |
Q: 1) what is the mass of a cat that weighs 30.0N? 2) a net force of +125 N acts on an object. fin d ...
A: Here are answers to your questions: 1) W = mg, where g is acceleration due to gravity m = W/g ...
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| physics | 7/8/2008 |
Q: 1.Explain with diagrams the variation of the acceleratoin due to gravity as one moves. 1.b at a ...
A: F = (GMm)/R^2 mg = (GMm)/R^2 ......(1) mg'= (GMm/(R+h)^2 ...(2) Divide (2) by (1): g' = ...
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| physics | 7/8/2008 |
Q: ... Q:1 A pendulum is suspended from the ceiling of a lift. if lift moves upward with uniform ...
A: Here are answers to your questions: 1. Time period of a simple pendulum depends on acceleration due ...
|
| egg dropping | 7/3/2008 |
Q: i have an experiment in class which asks me to drop an egg from 7.5 metres high and for it to hit ...
A: You may try this method. Stretch three layers of newspapers,three to four inches apart,close to the ...
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| tiny droplets | 7/2/2008 |
Q: sir, i have observed that when water droplets falls on a ground containing very tiny layer of water ...
A: This can be explained on basis of surface tension of water. Consider formula : P'-P = (2T/R)for a ...
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| Faraday's law of induction | 6/27/2008 |
Q: Good morning ; I have a question about Faraday’s law in transformers : How does the flux lines ...
A: The magnetic lines of forces linked with the primary coil of the transformer core are also linked ...
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| galvanometer-moving coil | 6/25/2008 |
Q: what is the reason for using a wire made of phosphor-bronze for holding up the coil? does it have ...
A: Wires and springs made of phosphor bronze- an alloy of copper and phosphorus - is highly sensitive ...
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| a few physics questions | 6/24/2008 |
Q: .. after looking at some of the reviews you've gotten i've decided to ask you for some help regard ...
A: Answers to remaining parts of question 1: x-component of velocity does not vary as there are no ...
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| physics | 6/23/2008 |
Q: A boy is swinging on a swing in a sitting position.How will be period affected if he stands up???
A: When the boy stands up the centre of gravity is raised and therefore the effective length of the ...
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| quesion | 6/20/2008 |
Q: You have 2 identical looking spheres. one of them is hollwo and the other is solid. suggest a method ...
A: You may transfer them into water.The hollow sphere may just float or start sinking in water.The ...
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| GCSE question should we spend time in the sun? | 6/18/2008 |
Q:
A: Exposure to sun is useful in formation of vitamin D in the body but the excessive exposure can cause ...
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| Physics Questions | 6/17/2008 |
Q: A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the ...
A: This is revised answer of your question Here is answer to your firstv^2 = u^2 + 2gh 0 = 9.6^2 + ...
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| magnets | 6/16/2008 |
Q: Can you explain to me how the nature of a material determines if it can be made into a magnet? ...
A: Only a magnetic substance can be converted into a magnet. To know whether a substance is magnetic or ...
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| physics | 6/16/2008 |
Q: How will I design a container that will protect the raw egg from breaking when dropped from a height ...
A: Allow the egg to fall on the the stretched sheet of the newspaper.Let the sheet slip through fingers ...
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| forces | 6/14/2008 |
Q: suppose a box is lying on a table . we push it. when we push it we exert some force on it and at the ...
A: You are right when you say that the block also applies an equal force on the person who is pushing ...
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| gravity, orbits | 6/12/2008 |
Q: Suresh! Ok- without rocket engines, a space shuttle, or any man-made junk, will have an orbit that ...
A: Moon and the satellites and planets which are not loosing kinetic energy due to friction of air will ...
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| forces | 6/12/2008 |
Q: suppose a box is lying on a table . we push it. when we push it we exert some force on it and at the ...
A: When a box is lying on a horizontal floor it has two forces actin on it which are equal and ...
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| units | 6/8/2008 |
Q: Sir few very basic questions related to units in meausrement as we hav been introduced to units in ...
A: Here are answers to your questions related to SI units; 1) SI units are do not change with time- ...
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| temperature | 6/7/2008 |
Q: Why the temperature on the top of the mountains is less compared to seashore even though we are ...
A: The earth is surrounded with a belt of air.The air-belt or atmosphere is spread up to to a height of ...
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| Physics | 6/6/2008 |
Q: We did this experiment in physics that show us the results that when resistance is being added to ...
A: You have not expressed your question clearly.However, I am trying to answer this. Connecting a ...
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| newtons first law | 5/22/2008 |
Q: could you please tell me if this is true or false: the faster you go, the stronger is the force of ...
A: According to Stoke's law the viscous drag ( fluid resistance) on a spherical object moving in a ...
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| physics: force | 5/20/2008 |
Q: A vehicle is coasting at 25.0 m/s when the handbrake is pulled to slow the car to a stop. It takes ...
A: v = u + at 0 = 25 + a.3 a = - 25/3 metre per second squared a is acceeleration of the vehicle ...
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