Red light has a lower energy per photon than blue light. Therefore, red light has
A) higher frequency, shorter wavelength than blue light.
B) lower frequency, longer wavelength than blue light.
C) lower frequency, shorter wavelength than blue light.
D) higher frequency, longer wavelength than blue light.
B) lower frequency, longer wavelength than blue light.
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A dragster drives a quarter mile (402 m) at a constant rate of acceleration, starting from rest and finishing the race at a final speed of 450 km/hr. If the mass of the dragster is 975 kg, together with its driver, and rolling friction is ignored, what average power was developed by the engine, if 50% of the power developed by the engine was delivered to the wheels?
A. 4.7 MW B. 1.2 MW C. 0.6 MW D. 2.4 MW
What two forces are balanced in what we call gravitational equilibrium?
A) the electromagnetic force and gravity B) outward pressure and the strong force C) outward pressure and inward gravity D) the strong force and gravity E) the strong force and kinetic energy
A bullet of mass 0.010 kg and speed of 500 m/s is brought to rest in a wooden block after penetrating a distance of 0.10 m. The work done on the bullet by the block is
A. 1250 J. B. 2.5 J. C. zero. D. -1250 J. E. -2.5 J.
What is the frequency of the light emitted by atomic hydrogen with m = 8 and n = 12? (The Rydberg constant is R = 1.097 × 107 m-1, c = 3.00 × 108 m/s)
A) 2.86 × 1013 Hz B) 1.43 × 1013 Hz C) 7.46 × 1013 Hz D) 8.82 × 1013 Hz E) 1.05 × 1013 Hz