A spaceship of triangular shape, having a length three times its width, is capable of relativistic speeds. How fast would it have to move so that to a stationary observer its length would equal its width?
a. 0.333c
b. 0.816c
c. 0.943c
d. 0.650c
e. This is not possible.
c
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The main purpose of the condenser in the steam cycle of a steam turbine is to
A) cool the steam. B) condense the steam. C) lower pressure on the back side of the turbine blades. D) maintain high efficiency. E) change mechanical energy to electricity.
Which two jovian planets have magnetic field tilts that are NOT along their rotation poles?
A) Saturn and Neptune B) Uranus and Neptune C) Jupiter and Uranus D) Jupiter and Saturn E) All jovian planets have magnetic fields close to their rotational axes.
Light spreads out when it passes through a narrow slit because of
a. interference. b. diffraction. c. specular reflection. d. diffuse reflection. e. polarization.
A beam of light of wavelength 610 nm passes through a slit that is 1.90 µm wide. At what the angle away from the centerline does the second dark fringe occur?
A) 39.9° B) 12.2° C) 18.7° D) 9.35° E) 11.4°