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  What is the mass of air in a room measuring 5m X 10m X 10m?

  Posted by mahmuda092569 on Dec 20, 2009 at 08:50 AM

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  In finding the density or relative density of a liquid, why is a method using a density bottle more accurate than one involving

  Posted by lucky092569 on Dec 20, 2009 at 08:46 AM

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  What is the volume of 2400 kg of petrol?

  Posted by syedajmain on Dec 19, 2009 at 05:25 AM

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  A small solid has an irregular shape and floats in water. Describe how you could measure its density.

  Posted by arman7763 on Dec 19, 2009 at 05:21 AM

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  Nitrogen pressure is p=64*10^3 (N/m^3) and thermal speed, vt=400(m/s). Knowing NA=6.023*10^23 (molecules/mol) and mN=28*10^-3 (Kg/mol).

  Posted by realcomplexnr on Dec 18, 2009 at 01:16 AM

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  Two billiard balls of equal mass undergo a perfectly elastic head-on collision.

  Posted by dongy on Dec 17, 2009 at 11:07 PM

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  A 15g bullet strikes and becomes embedded in a 1.24kg block of wood placed on a horizontal surface just in front of the gun.

  Posted by dyuan on Dec 17, 2009 at 04:50 PM

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  In finding the density or relative density of a liquid, why is a method using a density bottle more accurate than one involving the use of ..

  Posted by lucky092569 on Dec 17, 2009 at 06:14 AM

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  Draw diagrams to show or instruct to draw a drawing pin in positions of stable, unstable and neutral equilibrium.

  Posted by arman7763 on Dec 16, 2009 at 11:54 PM

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  A cone is little bit tilted towards left leaving left corner still touching to the ground. Show the forces acting on the cone. Explain why the..

  Posted by syedajmain on Dec 16, 2009 at 11:44 PM

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  What is the speed of a 500 kg satellite orbiting the moon (mass = 7.3 x 10 22kg ) at a distance of 2.5 x 10 6 m from the moon's center?

  Posted by lovetissue on Dec 16, 2009 at 09:50 PM

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  Determine the speed required of a 1000 kg roller-coaster entering a vertical dip (at the bottom of a hill) of radius 10 m, in order to give the

  Posted by paperheart on Dec 16, 2009 at 09:45 PM

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  A 1400 kg car is travelling at 25 m/s up a circular hill of radius 210 m. What is the applied force on this car at the top of this hill?

  Posted by papertissue on Dec 16, 2009 at 08:31 PM

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  What is the speed of a 500 kg satellite orbiting the moon (mass = 7.3 x 10 22kg ) at a distance of 2.5 x 10 6 m from the moon's center?

  Posted by ispyy on Dec 16, 2009 at 08:20 PM

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  Explain the energy loss in the system below, considering heat, sound, and deformation.

  Posted by greg786 on Dec 16, 2009 at 06:17 AM

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  What is the density of mercury in kg/m^3? What is it's density in g/cm^3? What is it's relative density?

  Posted by mahmuda092569 on Dec 15, 2009 at 06:58 PM

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  Water has a density of 1000kg/m^3; what does this mean? What is it's density in g/cm^3?

  Posted by arman7763 on Dec 15, 2009 at 08:13 AM

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  Does water thrown up by a truck travelling in the rain down a highway behave like pulses or waves?

  Posted by jk180 on Dec 15, 2009 at 07:42 AM

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    Water has a density of 1000kg/m^3; what does this mean? What is its density in g/cm^3?  

  Posted by syedajmain on Dec 15, 2009 at 07:39 AM

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  A bar is in equilibrium. From left end P, after 1m a 6N force acting downwards. From there, 2m towards right a point O acting a upward force of..

  Posted by lucky092569 on Dec 15, 2009 at 07:32 AM

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  On a plank AB a man standing 1m away from A towards B with a weight of 500 N and the distance from the man to B is 3m. the weight of plank is 200 N..

  Posted by mahmuda092569 on Dec 14, 2009 at 07:29 AM

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   An electric battery debits on a variable resistance a power which is a fraction f = 36% of maximum power that could one debit.

  Posted by realcomplexnr on Dec 14, 2009 at 07:21 AM

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  A meter  rule balances at "O" 0.1m from the left end towards right end. At left end there is a downwards weight of 4N. Calculate the weight...

  Posted by syedajmain on Dec 13, 2009 at 11:53 PM

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  A 5.0cm diameter steel shaft has 0.10mm clearance all around its bushing at 20 degree Celsius.

  Posted by kela000 on Dec 12, 2009 at 09:17 AM

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  A person is standing on a scale in a elevator accelerating downward. compare the reading on the scale to the person's true weight.

  Posted by harris123 on Dec 12, 2009 at 08:21 AM

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  Consider a small satellite moving in a circular orbit(radius) about a spherical planet(mass).Which expression gives this satellites orbital velocity?

  Posted by jharry23 on Dec 12, 2009 at 08:11 AM

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  Suppose a satellite wer orbiting the Earth just above the surface. What is its centripetal acceleration?

  Posted by lala2pretty on Dec 12, 2009 at 07:46 AM

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  As a rocket moves away from the Earth's surface, the rocket's weight...

  Posted by juniormax on Dec 12, 2009 at 07:44 AM

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  What is the difference between the pressures inside and outside a tire called?

  Posted by paul123 on Dec 11, 2009 at 07:10 AM

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  50 cm^3 of wood is floating on water, and 50 cm^3 of iron is totally submerged. Which has the greater buoyant force on it?

  Posted by jayjay00 on Dec 11, 2009 at 07:07 AM

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  A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water.

  Posted by shawn123 on Dec 11, 2009 at 06:48 AM

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  An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe narrows to half its original radius, what is the flow speed in the narrower section?

  Posted by kela000 on Dec 11, 2009 at 06:44 AM

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  Which one of the following is associated with the law of conversation of energy in fluids?

  Posted by lala25 on Dec 11, 2009 at 06:34 AM

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  A steel bridge is 1000m long at -20 degreesC in winter. What is the change in length when the temperature rises to 40 degreesC in summer?

  Posted by lala2pretty on Dec 11, 2009 at 06:08 AM

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  Evaluate the experiment below, identifying energy loss and errors, and access their effect on the efficiency?

  Posted by greg786 on Dec 9, 2009 at 07:14 PM

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  The maximum torque a bolt can withstand without breaking is 100 N m. A mechanic tightens the bolt with a spanner 0.25 m long. What is the ..

  Posted by arman7763 on Dec 9, 2009 at 07:35 AM

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  If you could connect the North and South poles via a tube and you fell into one of the openings, would you come out the other side?

  Posted by deonokin on Dec 8, 2009 at 07:59 PM

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  A satellite movs in a circular orbit around the Earth at a speed of 5.1 km/s.

  Posted by hrrjack on Dec 8, 2009 at 06:19 AM

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  Use Newton's version of Krpler's third law and these data to find the mass of Saturn. Answer in units of kg.

  Posted by jharry23 on Dec 8, 2009 at 06:10 AM

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  Find magnitude of gravitational force 61.8kg person would experience while standing on surface of Earth with mass 5.98x10^24kg and radius 6.37x10^6m

  Posted by lala2pretty on Dec 8, 2009 at 05:43 AM

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  Find the force of attraction between them.The value of the universal gravitational constant is 6.67259 x 10^-11 N times m^2/kg^2.Answer in units of N

  Posted by juniormax on Dec 8, 2009 at 04:46 AM

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  Why is there a small gap between two railway lines?

  Posted by salmanrizvi on Dec 8, 2009 at 04:02 AM

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  Can a bird fly in zero gravity?

  Posted by deonokin on Dec 7, 2009 at 07:37 PM

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  A ball with mass m = 0.2 kg falls  free on a horizontal plane, having at time of collision, the velocity v = 16m / s.

  Posted by xuediot on Dec 7, 2009 at 05:52 AM

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  A girl is pushing on the handle of a lawnmower with a force of 100 N by making an angle of 30 degree with the ground. (a) Find the vertical .....

  Posted by lucky092569 on Dec 4, 2009 at 05:00 AM

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  The height, h, in meters above the ground, of a projectile at any time, t, in seconds, after launch is defined by the function h=-4t^2+48t+3...

  Posted by dreanna on Dec 3, 2009 at 09:24 AM

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  What is inertia?

  Posted by nerd1772 on Dec 2, 2009 at 05:07 PM

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  Bird flies w/ speed of 12.2 over water, drops fish. a=gravity at 9.81. The alt. of bird=5.3. Air resistance=none. What is the bird speed at impact?

  Posted by madisonliz on Nov 29, 2009 at 06:50 PM

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  Why can the mass of an electron can be ignored in a nuclear reaction involving protons and neutrons?

  Posted by buffy-the-vampire-slayer on Nov 24, 2009 at 05:31 PM

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  Xray pulses from Cygnus X1, a celestial xray source, have been recorded during high-altitude rocket flights.

  Posted by won on Nov 24, 2009 at 05:19 AM