Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 20

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Question 1
4 / -1

A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then elastic energy stored in the wire is

A
20 J

B
0.1 J

C
0.2 J

D
10 J

Solution
Question 2
4 / -1

When a body falls in air, the resistance of air depends to a greater extent on the shape of the body. Three different shapes are given Fig. Identify the combination of air resistances which truely represents the physical situation. (The cross-sectional areas are the same).

A
1 < 2 < 3

B
2 < 3 < 1

C
3 < 2 < 1

D
3 < 1 < 2
Question 3
4 / -1

A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 5 N. The bird of mass 0.5 kg flies upward in the cage with an acceleration of 2m/s² . The spring balance will now record a weight of

A
4 N

B
5 N

C
6 N

D
7 N
Question 4
4 / -1

A steel ball of mass 0.1 kg falls freely from a height of 10 m and bounces to a height of 5.4 m from the ground. If the dissipated energy in this process is absorbed by the ball, the rise in its temperature is (Specific heat of steel = 460 J kg^–1 C^–1\'g = 10 ms^2–)

A
0.01°C

B
0.1°C

C
1°C

D
1.1°C

Solution
Question 5
4 / -1

Water falls from a height 500 m. What is the rise in temperature of water at bottom if whole energy remains in the water?

A
0.96°C

B
1.02°C

C
1.16°C

D
0.23°C

Solution
Question 6
4 / -1

A faulty thermometer has its lower fixed point marked as –10°C and upper fixed point marked as 110°. If the temperature of the body shown in this scale is 62°, the temperature shown on the Celsius scale is

A
72° C

B
82° C

C
60° C

D
42° C

Solution
Question 7
4 / -1

On the celsius scale the absolute zero of temperature is at

A
0°C

B
–32°C

C
100°C

D
–273.15°C

Solution
Question 8
4 / -1

Oxygen boils at –183°C. This temperature is approximately

A
215°F

B
–297°F

C
329°F

D
361°F

Solution
Question 9
4 / -1

Recently, the phenomenon of superconductivity has been observed at 95 K. This temperature is nearly equal to

A
–288°F

B
–146°F

C
–368°F

D
+178°F

Solution
Question 10
4 / -1

The temperature of a substance increases by 27°C. On the Kelvin scale this increase is equal to

A
300 K

B
2.46 K

C
27 K

D
7 K