Which of these are fundamental physical quantities?
a. space, time, and matter b. kilograms, seconds, and meters
c. length, time, and mass d. momentum, energy, and mass
c
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The force required to maintain a constant velocity for an astronaut in free space is equal to
A) zero. B) the mass of the astronaut. C) the weight of the astronaut. D) the force required to stop the astronaut. E) none of the above
An electron of mass 9.11 × 10^-31 kg moves with a speed of 0.800c. What is its momentum? (c = 3.00 × 10^8 m/s)
a. 3.64 × 10^-22 kg×m/s c. 6.03 × 10^-22 kg×m/s b. 2.05 × 10^-22 kg×m/s d. 1.34 × 10^-22 kg×m/s
Radiation dosage is commonly measured in
A) rads. B) rems. C) joules. D) none of the above
A glass plate whose index of refraction is 1.56 is immersed in a liquid. The surface of the glass is inclined at an angle of 42.0° with the vertical. A horizontal ray in the glass is incident on the interface
When the liquid is a certain alcohol, the incident ray arrives at the interface at the critical angle. What is the index of refraction of the alcohol? A) 1.04 B) 1.02 C) 1.00 D) 0.984 E) 1.06