Which is a valid velocity reading for an object?

45 m/s

45 m/s north

0 m/s south

0 m/s

Why do protons repel protons but attract electrons?

A cube of mass m1 = 7.7 kg is sitting on top of another cube of the same size and mass m2 = 1.4 kg while they are both in free-fall.

What average power is generated by the muscles of a 70.0-kg mountain climber who climbs a summit of height 325 m in 95.0 min?

Explain the difference between a fuse and a circuit breaker. If you were designing a circuit for a reading lamp, would you include a fuse, a circuit breaker, or neither? Explain your answer.

a water tank is 40m high and contains 4,000 kg of water. What is the gravitational potential energy of the water? show your work with the GUESS method

Metallic bonds are important to how paperclips are both made and used

A motorbike travels 45 miles in 15 minutes what is its speed

What is the relationship between the kinetic energy of molecules in an object and the object temperature

A man inside an insulated metallic cage does not receive shock when the cage is highly charge. explain.

When a 3.50-g sample of liquid octane (c8h18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 27.3 ∘c. the heat capacity of the calorimeter, measured in a separate experiment, is 6.22 kj/∘c?