Chan hee is inflating a basketball using an air pump he notices that the pump hets warm as he uses it what is a good hypothesis that could lead to new experimentation

A person is pushing a box across a table. The measured forces on the box are 10N, 14N, - 7N, - 10N. Which force is represented by - 7N?

How many moles of gas must be forced into a 4.6 l tire to give it a gauge pressure of 31.2 psi at 26 âc? the gauge pressure is relative to atmospheric pressure. assume that atmospheric pressure is 14.

At what distance between two objects would you have the greatest gravitational force

Determine whether heating or cooling takes place during each process. evaporation condensation freezing melting sublimation deposition Heating Cooling

Which ion is typically present in soil with high acidity?

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.