Ôn tập Science

What is the unit of Energy?

• Km

• Watt

• Joules

• Joules per second

What is the formula of Gravitational potential energy?

• GPE = mgh

• GPE = Power / time

• GPE = useful output energy / total input energy

• GPE= Force x distance

What is the term to describe energy spent at a specific amount of time?

• Workdone

• Momentum

• Power

• Motion

What is the word to describe energy is created by the change of shape of an object and back to normal state?

• Kinetic energy

• Gravitational potential energy

• Elastic energy

• Thermal energy

which of these is renewable energy:

• Solar energy

• Natural gas

• Nuclear energy

• Fossil fuel

What is the unit for acceleration?

• m/s

• m/s^2

• Ns

• Joules

what is the definition of Workdone?

• Energy is created by motion

• Energy is released after a reaction

• Energy is created by its position above the ground

• Energy is created by how strong the force pull/ push the object to make the object travelled by a certain distance

What is Watt?

• Energy unit

• Momentum unit

• Power unit

• Velocity unit

You see two cars crash. Less than a second, you hear a loud noise and some of the smoke fly off. What kind of energy is transferred in that case?

• Gravitational to Kinetic

• Kinetic to Sound and thermal energy

• Thermal energy to Kinetic

• Chemical to Kinetic energy

Who states the law of universal gravitation?

• Albert Einstein

• Issac Newton

• Galileo Galilei

• James Watt