# Physics MCQs Part 10

A. The density of the liquid

**B. The area of the liquid surface**

C. The height of the liquid

D. The acceleration

**92. What is the shape of the liquid meniscus in a capillary tube placed in a liquid that wets**

**the surface of the tube.?**

**A. Flat**

B. Concave downwards

C. Convex up

D. None of the above is correct

**93. A piece of weighted wood just floats in water. When place3d in alcohol (of lower**

**density) it will.?**

**A. Float lower**

B. Float higher

C. Stay as before

D. Sink

**94. A force of 100 dynes acts for 10 seconds on a body of mass 500g. What is the change**

**in momentum.?**

A. 10 C.G.S units

B. 100 C.G.S units

C. 1000 C.G.S units

**D. 5000 C.G.S units**

**95. A 40kg cart moving at 3 m/s makes a head a head-on collision with a 20 kg cart at rest,**

**as illustrated in Fig. 1.If the collision is completely inelastic, the speed with winch the**

**carts leave the impact is approximately.?**

**A. 2 m/s**

B. 6 m/s

C. 20 m/s

D. 0.2 m/s

**96. If the earth stopped rotating, the weight of objects at the equator would.?**

**A. Be greater**

B. Be the same as before

C. Be less

D. Very with latitude

**97. A satellite travels in a circular orbit at a speed of 20,000 km/hr to stay at a constant**

**altitude. To escape from the earth, the speed would have to be increased to.?**

A. 28,000 km/hr

B. 21,000 km/hr

**C. 40,000 km/hr**

D. 64,000 km/hr

**98. A projectile is fired at an angle of 37° with an initial speed of 100 m/s. What is the**

**approximate versicle component of its velocity after 2s.?**

A. 80 m/s

**B. 40 m/s**

C. 60 m/s

D. 100 m/s

**99. Two pieces of wire of the same material have their lengths in the ratio of 1:2 and**

**diameters in the ratio of 2:1. If they are stretched by the equal force, elongation will be**

**int he ration of.?**

A. 1:2

B. 2:1

**C. 1:8**

D. 8:1

**100. With the help of dimensions method it can be proved that frequency of a stretched wire.?**

A. Does not depend on the mass of the wire

B. Depends on the displacement of the wire

**C. Depends on the mass of the wire**

D. None of these