A 40kg rock is perched atop a cliff that is 50 m high. What is it's potential energy?

Find the mass of a golfball that accelerates at 18m/s2 when 8.3 N force is applied to it It's physical science

A unit vector is used in the symbolic representation of the electric field. What physical units does the unit vector have? meters. The unit vector has no units. coulombs. The units depend on how it is used.

Match the following items. 1. empathy a personal view of a situation; ability to understand the senses 2. perception mental health professional who attended medical school 3. cognition concerned with the treatment of disease 4.

A ball thrown horizontally at vi = 30.0 m/s travels a horizontal distance of d = 55.0 m before hitting the ground. from what height h was the ball thrown?

Darwin's hypothesis that explains differences between species is better known as "evolution by natural selection." true or false

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.