The Eiffel tower in Paris is 300 meters tall on a cold day (T = – 5 degrees Celsius). What is its height on a hot day when the temperature is 35 degrees? (It is made of iron which has a coefficient of linear expansion of 0.000012 per degree Celsius.)
300.144 m
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The efficiency of a heat engine is given by the ratio of
A. net work done/amount of heat supplied B. net work done/amount of heat lost C. amount of heat supplied/amount of heat lost D. amount of heat supplied/new work done
The person who first explained the blackbody spectrum was
a. Max Planck. b. Albert Einstein. c. Neils Bohr. d. Erwin Schrödinger. e. Werner Heisenberg.
A solenoid of length 5.0 cm has a cross sectional area of 1.0 cm2 and has 300 uniformly spaced turns. The solenoid is wrapped in 180 turns of insulated wire resulting in a mutual inductance of
A) 1.1 H. B) 1.4 × 10-2 H. C) 11 H. D) 1.4 × 10-4 H. E) 110 H.
A helium balloon rises because of
a. Archimedes' principle b. Pascal's principle c. Bernoulli's principle d. Torricelli's principle e. none of these principles