# Challenging Physics Quiz Part: II

### The second installment of a beginner/intermediate physics quiz! 10 Questions.

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1

• 10J
• 100J
• 1J
• 25J

2

### A thin-walled hollow cylinder and a solid cylinder start from rest and roll down an inclined plane. Both cylinders start at the same height. Which cylinder reaches the bottom of the first?

• The hollow cylinder
• The solid cylinder
• Both reach bottom at same time
• What's a cylinder??

3

### You place two identical containers A and B, filled with water into a freezer. The temperatures of the water in the containers are 90°C and 30°C respectively. Which container will cool down faster?

• Both cool down at the same rate
• Container B (30°C) cools faster
• Container A (90°C) cools faster
• Impossible to tell

4

• 100 Km/h
• 200 Km/h
• 150 Km/h
• 50 Km/h

5

• 2*m*g
• m*g
• (m*g)/2
• (m*g)/4

6

### When you drop a ball it accelerates downward at 9.8 m/s^2. If you instead throw it downward, then its acceleration immediately after leaving your hand, assuming no air resistance, is:

• 9.8 m/s^2
• More than 9.8 m/s^2
• Less than 9.8 m/s^2
• Cannot say, unless the speed of throw is given.

7

### Which travels faster?

• The speed of sound in water
• The speed of sound in air
• The speed of sound in a vacuum
• The speed of sound in Iron

8

• Fresnel lens
• Biconcave
• Concave
• Convex

9

### An airplane speeds up when wind blows from behind and loses speed when the wind is head on. When the wind is at a right angle to the plane, what happens to its speed relative to the ground below?

• Increases
• Decreases
• No change
• None of the above

10

### The Moon is most responsible for Earth’s tides. Which pulls more strongly on the Earth and its oceans?

• Moon
• Sun
• Both pull equally
• None of the above

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