A rock hits the ground with a speed of 7 m/s and a kinetic energy of 100 J. What is the rock's mass?

If the total momentum of a system is changing: (a) particles of the system must be exerting forces on each other (b) the system must be under the influence of gravity (c) the center of mass must have a constant velocity (d) a net external force must

Why houses have garage?

A 1.05 kg water bottle is sitting on the teacher's desk it is. 20 m tall and has a radius of. 03 m find the force that the water bottle applies on the desk and then find the pressure applied

The Electrons in a beam are moving at 2.7x108 m/s in an electric field of 16000 N/C. What value must the magnetic field have if the electrons pass through the crossed fields undeflected?

Sound waves are a type of mechanical wave and can therefore travel through space because they do not require a medium. True False

A skydier jumps out of a hovering helicopter so there is no forward velocity. what is the skydivers acceleration/11170085/84c6e0eb? utm_source=registration

A book of 500 leaves has a mass of 1kg if its thickness is 5cm what are the mass and thickness of each leaf

Why does a curve on a distance-time graph indicate acceleration? an increasing amount of time passes for each unit of distance a decreasing amount of time indicates a decreasing number of distance units an increasing distance is traveled during each

What would happen if you dropped two balls of different masses but equal shape and volume from a building?

A bag of sports equipment has a mass of 10.0 kilograms and a weight of