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
Physics & Space Science
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A 25. meter long wire, of diameter 0.30 mm, connected to 3.00 volts draws 0.499 A
(a) What is the resistance of the wire? (b) What is its resistivity? (c) What is its conductivity?
Physics & Space Science
A diffraction grating with 10,000 lines/cm will exhibit the first order (m = 1) maximum for light of wavelength 264 nm at what angle? (1 nm = 10-9 m)
a. 15.3° c. 0.51° b. 0.62° d. 31°
Physics & Space Science
Which of the following has the largest momentum relative to Earth?
A) a tightrope walker crossing Niagara Falls B) a pickup truck speeding along a highway C) a Mack truck parked in a lot D) a dog running down the street
Physics & Space Science
The discoverer of X-rays was
A) Bragg. B) von Laue. C) Fermi. D) Roentgen. E) Xavier.
Physics & Space Science