Definition Quiz!

1. What does the Newton's third law say?

• For each action, there is an equal and opposite reaction that cancels it.

• For each action , there is an equal and opposite reaction.

• Resultant force is the product of mass and acceleration of a body.

• An object in motion continues in straight line unless acted on by external force.

2. Define acceleration

• Acceleration is the change in deplacement per unit time

• Acceleration is the change in speed per unit time

• Acceleration is the rate of change of velocity.

• Acceleration is how Mr Ng feels when marks the prelim paper.

3. Stable equilibrium is

• when a body returns to its original position after being moved.

• when a body returns to its original position after being displaced slightly.

• when a body does not returns to its original position after being moved.

• when a body topples after being moved.

4. Atmospheric pressure is

• 101000 Pa at sea level.

• 101000 Pa at 4 floor in 4E1 classroom.

• 101000 Pa at Mt Everest.

• 120000 Pa at sea level.

1. Energy is

• how much starbucks drink you can finish in 1 hour.

• the capacity to do work.

• the power per unit time.

• rate of change of work done.

Tags

NGSS.HS-PS3-2

6. Thermal equilibrium is when

• there are no net flow of thermal energy between two bodies.

• there are no net flow of thermal energy in a body.

• there is flow of thermal energy between a bowl of noodle and air.

• there is flow of thermal energy between two bodies.

7. Kinetic model of matter states that

• matter is made up of tiny particles.

• all matter is made of molecules that are constantly vibrating.

• all matter is made of particles have kinetic energy only.

• all matter is made of tiny particles that are always in continuous random motion.

8. Define density

• Density is the mass per unit volume of a liquid only.

• Density is the change in mass per volume of a substance.

• Density is the mass per unit volume of a gas only.

• Density is the mass per unit volume of a substance.

9. Define wavelength.

• Wavelength is the distance between two crests of a wave.

• Wavelength is the distance between two neighbouring crests of a wave.

• Wavelength is the distance between one crest and one trough.

• Wavelength is the number of waves generated when Sizhuang jumps into a swimming pool.

10. Define Lenz's Law.

• Lenz's law state that the induced emf is always such that its magnetic effect opposes the motion producing it.

• Lenz's law state that the direction of the induced emf is always such that its magnetic effect opposes the motion producing it.

• Lenz's law state that the magnitude of the emf induced is directly proportional to the rate of change of magnetic flux in the circuit.

• Lenz's law state that the magnitude of the emf induced is directly proportional to the magnetic flux in the circuit.