An object ‘A’ of mass 3.0 kg moving with velocity 21 m/s, collides inelastically with another object ‘B’ of mass 5.0 kg moving with velocity 8.0 m/s.

After collision object ‘B’ starts to move with velocity 2.0 m/s,

a) Find the velocity of an object ‘A’ after collision?

b) Calculate KE before and after collision?

c) Is KE conserved?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

However, had it been a real sound, the sound's pitch would have been increased by the doppler effect, since the falcon was moving the source of the sound. perpendicular to away from towards at the same speed as

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.