Acar moving with a velocity of 20 meters/second has 1.8**10^5 joules of kinetic energy what is the mass of the car?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Acar of mass 800kg is moving at a speed of 2.2m/s.