The atomic number of an element represents the number of:

neutrons

protons

electrons

protons and neutrons

If an electric circuit was analogous to a water park, then the battery would be analogous to the a. pipes which carry water to the circuit b. pump which supplies energy to move the water from a ground to a high elevation c.

a 40 kg block is being pulled at constant velocity across a horizontal surface by a 150 N force at an angle 60 above the horizontal. What is the coefficient of kinetic friction between the block and the floor

The average daily demand for component B is 750 units. The average time for waiting during the production process and materials handling is 0.15 days. Processing time per container is 0.1 days.

The density of water is the greatest at a temperature of a. 0 K. b. 4 K. c. 273 K. d. 277 K.

A dense metal sphere is dropped from a 10-meter tower, and at the exact same time an identical metal sphere is thrown horizontally from the same height. If air friction is ignored, which statement below is true? A. Both spheres land at the same time.

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?