Ryan is swinging a 0.2 kg ball tied to a string around his head in a flat, horizontal circle. The radius of the circle is 0.40 m, and linear speed is 1.3 m/s. Find the centripetal force acting on the ball to keep it in the circular path. O 1.72 N O 2.04 N 0 0.046 N 0 0.845 N

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the acceleration?

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next