In a ballistics test, a 30 g bullet traveling horizontally at 1500 m/s goes through a 27-cm-thick 320 kg stationary target and emerges with a speed of 940 m/s . The target is free to slide on a smooth horizontal surface. (a) How long is the bullet in the target?
1 s
What average force does it exert on the target?
2 N (magnitudeonly)
(b) What is the target's speed just after the bullet emerges?
3 m/s

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.

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical