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Worksheetsheat and expansivity
Total questions: 15
Worksheet time: 11mins
An iron rod of length 50 m and at a temperature of 600C is heated to 700C. Calculate its new length.
(Linear expansivity of iron = 1.2 x 10-5 K-1)
50.006 m
50.060 m
51.600 m
51.200 m
A brass rod is 2m long at a certain temperature. Calculate the linear expansion of the rod for a temperature change of 100 K. (Linear expansivity of brass = 1.8 x 10-5 K-1)
0.3600 m
0.1800 m
0.0360 m
0.0036 m
A metal rod of length 40.00 cm at 200C is heated to a temperature of 450C. If the new length of the rod is 40.05 cm, calculate its linear expansivity.
1.2 x 10-5 K-1
2.5 x 10-5 K-1
3.5 x 10-5 K-1
5.0 x 10-5 K-1
Steel bars, each of length 3.0 m at 280C, are to be used for constructing a rail line. If the linear expansivity of steel is 1.0 x 10-5 K-1, what is the safety gap that must be left between successive bars if the highest temperature expected is 400C ?
1.2 x 10-1 cm
8.4 x 10-2 cm
3.6 x 10-2 cm
1.8 x 10-2 cm
A wire, 20 m long, is heated from a temperature of 50C to 550C. If the change in length is 0.020 m, calculate the linear expansivity of the wire.
1.0 x 10-3 K-1
2.0 x 10-4 K-1
2.0 x 10-5 K-1
2.0 x 10-6 K-1
A brass rod is 2m long at a certain temperature. Calculate the linear expansion of the rod for a temperature change of 100 K. (Linear expansivity of brass = 1.8 x 10-5 K-1)
0.3600 m
0.1800 m
0.0360 m
0.0036 m
A wire, 20 m long, is heated from a temperature of 50C to 550C. If the change in length is 0.020 m, calculate the linear expansivity of the wire.
1.0 x 10-3 K-1
2.0 x 10-4 K-1
2.0 x 10-5 K-1
2.0 x 10-6 K-1
A metal rod of length 40.00 cm at 200C is heated to a temperature of 450C. If the new length of the rod is 40.05 cm, calculate its linear expansivity.
1.2 x 10-5 K-1
2.5 x 10-5 K-1
3.5 x 10-5 K-1
5.0 x 10-5 K-1
Steel bars, each of length 3.0 m at 280C, are to be used for constructing a rail line. If the linear expansivity of steel is 1.0 x 10-5 K-1, what is the safety gap that must be left between successive bars if the highest temperature expected is 400C ?
1.2 x 10-1 cm
8.4 x 10-2 cm
3.6 x 10-2 cm
1.8 x 10-2 cm
