physics

The maximum density of water occurs at a temperature of?

A. 0°C B. 4°C C. 37°C D. 273°C Correct Answer: Option B B. 4°C Explanation This is as a result…

6 years ago

Thermal energy added or removed from a substance that changes the state of the substance is called?

A. latent heat B. heat of reaction C. calorimetry D. specific heat Correct Answer: Option A A. latent heat Explanation…

6 years ago

Which of the following devices converts light energy to electrical energy?

A. Bulb B. Television C. Solar cell D. Light-emitting diode (LED) Correct Answer: Option C C. Solar cell Explanation The…

6 years ago

The diagram above illustrates a beaker of water being heated. It is observed that as the bubbles rise they get bigger in size.The reason for this observation is?

A. water pressure on the bubbles decreases B. density of water increases with rise in temperature C. volume of water…

6 years ago

A plane is inclined at an angle θ to the horizontal. Its velocity ratio is?

A. sinθ B. tanθ C. 1/sinθ D. 1/tanθ Correct Answer: Option C C. 1/sinθ Explanation Velocity ratio = Effort distance…

6 years ago

Ice of mass 50g at 0°C was completely melted by 70% of the total heat energy supplied. Calculate the total heat energy supplied [Specific latent heat of fusion of ice = 336Jg−1]

A. 2400J B. 6800J C. 7251J D. 24000J Correct Answer: Option D D. 24000J Explanation The quantity of heat needed…

6 years ago

The energy stored in the spring of stiffness constant k = 2000Nm−1 when extended 4cm is?

A. 0.16J B. 1.60J C. 16.00J D. 160.00J Correct Optiom: Option A A. 0.16J

6 years ago

A body can undergo the following types of motion except?

A. random B. rotational C. translational D. relative Correct Answer: Option D D. relative Explanation Relative motion is the calculation…

6 years ago