Which one of the following violate the law of conservation of momentum Mass before: 5 kg, velocity before: 3 m/s mass after: 6 kg, velocity after: 2 m/s

Mass before: 4 kg, velocity before: 3 m/s mass after: 3 kg, velocity after: 4 m/s

mass before: 4 kg, velocity before: 3 m/s mass after: 6 kg, velocity after: 2 m/s

a) All
b) None
c) Bottom only
d) Top only

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e