Acar moves from a position 50 m south of the library to a new position 250
m north of the library. this movement takes 15 seconds. what is the velocity
of the car?
o
o
o
o
a. 20 m/s north
b. 20 m/s south
c. 13 m/s south
d. 13 m/s north

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?