Physics MCQ -15

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Physics MCQ -15

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What is the temperature difference between the fixed points on the °C temperature scale?

1 point

A 10 °C

B 100 °C

C 110 °C

D 120 °C

Clear selection

Brakes are used to slow down a moving car.Into which form of energy is most of the kinetic energy converted as the car slows down?

1 point

A chemical

B elastic

C thermal

D sound

Clear selection

What is the unit of the moment of a force?

1 point

A N

B N/ kg

C N/ m

D N m

Clear selection

A man hears a starting pistol fire 1.5 seconds after he sees a puff of smoke from the pistol. The sound and the smoke are made at the same time. The starting pistol is 450 metres away from the man. What is the speed of sound calculated from this observation?

1 point

A 150 m / s

B 300 m / s

C 330 m / s

D 625 m / s

Clear selection

Which source of energy is non-renewable?

1 point

A oil

B solar

C tidal

D wind

Clear selection

A metal block of weight W rests on a table. In order to calculate the pressure that the block exertson the table, one other quantity must be known.What is the other quantity?

1 point

A the area of contact between the block and the table

B the density of the block

C the mass of the block

D the volume of the block

Clear selection

Which method of thermal transfer occurs when the density of some of a liquid decreases and the liquid moves upwards?

1 point

A conduction

B convection

C evaporation

D radiation

Clear selection

A car travels at an average speed of 60 km / h for 15 minutes.How far does the car travel in 15 minutes?

1 point

A 4.0 km

B 15 km

C 240 km

D 900 km

Clear selection

A plastic rod is rubbed with a dry cloth. The rod becomes positively charged.Why has the rod become positively charged?

1 point

A It has gained electrons.

B It has gained neutrons.

C It has lost electrons.

D It has lost neutrons.

Clear selection

What is the unit of thermal energy?

1 point

A) °C

B) N

C )J

D) W

Clear selection

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