Inner radius is R and outer radius 3R, charge density is p, negatively charged, long cylinder. This cylinder is immersed in a dielectric constant k= 80 (clean water), then what is the electric field strength of the cylinder axes from distance 5R. Write E5R wtih R, p and ε0.

Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

What is the momentum of a 2 kg object moving at 15 meters per second