Which of the following is an example of a physical change?

A. water freezing

B. a cake baking

C. a match burning

D. fireworks exploding

How do similar (S-S or N-N) magnetic poles interact? A. They repel each other. B. They attract each other. Ĉ. They become demagnetized. D. They move closer together.

A toaster oven draws 300.0 watts of power. if it is plugged into an outlet with a voltage of 115 volts, what current is in the toaster's circuit?

An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the skateboard

1. Which of the following best defines the term mass?

The amount of energy transferred to electrons by ionizing radiation is the basis of the concept of: A. electromagnetic radiation B. nuclear power C. radioactive decay D. radiation dose

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.