Agent arlene devised the following method of measuring the muzzle velocity of a rifle. she fires a bullet into a 4.350-kg wooden block resting on a smooth surface, and attached to a spring of spring constant k = 145.0 n/m . the bullet, whose mass is 7.700 g , remains embedded in the wooden block. she measures the maximum distance that the block compresses the spring to be 9.460 cm. what is the speed v of the bullet?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

What ions are formed when hcl dissolves in water?