Physics Past Questions and Answers

Question 4896:

A quantity of ice $-{10}^{\circ }C$ is heated until the temperature of the heating vessel is ${90}^{\circ }C$. Which of the following constants NOT required to determine the quantity of heat supplied to the vessel?

A. Specific latent heat of vaporization
B. Specific heat capacity of ice
C. Specific latent heat of fusion
D. Specific heat capacity of water

Question 4897:

The scent from a jar of perfume opened moves through the air molecules by ____________

A. Evaporation
B. Osmosis
C. Diffusion
D. Convection

Question 4898:

In the diagram above, $P,Q$ and $R$ are vectors. Which of the options gives the correct relationship between the vectors?

A. $P=R-Q$
B. $P=R+Q$
C. $P-Q-R$
D. $P+$ $R+Q=0$

Question 4899:

A convex lens of focal length $10.0cm$ is used to form a real image which is half the size of the object. How far from the object is the image?

A. $45cm$
B. $30cm$
C. $15\text{(}cm$
D. $20cm$

Question 4900:

A diverging lens of focal length $20cm$ forms an image, half of the size of the object. What is the object distance?

A. $11.11cm$
B. $100cm$
C. $60cm$
D. $8.71cm$