A rock is dropped from a window 5 m above the ground. the rock hits the ground 1 s later with a speed of 10 m/s. what is the average speed of the rock during this time

As the caterpillar climbs, its potential energy is increasing. what source of energy has been used to effect this change in potential energy?

What substance is represented by chemical formula C60

Heat naturally flows from an object at a lower temperature to one at a higher temperature. A. TrueB. False

What will decrease over time as a result of improved cardiorespiratory fitness? endurance perspiration body temperature resting heart rate

A neutral boron atom has 6 neutrons and 5 electrons. How many protons does it have?

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.