Both sound waves and electromagnetic radiation:
A) travel at the speed of light.
B) require a medium to move through space.
C) can move through space without a medium.
D) transfer energy.
E) are transverse waves.
D
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Potential: If the electric potential at a point in space is zero, then the electric field at that point must be
A. negative. B. zero. C. uniform. D. positive. E. impossible to determine based on the information given.
Which asteroid did Dawn visit first and which is second in its planned mission?
A) Mathilde, Eros B) Ida, Dactyl C) Vesta, Ceres D) Gaspra, Ida E) Pallas, Ceres
For a white dwarf to explode entirely as a Type I supernova, its mass must be
A) at least 0.08 solar masses. B) 1.4 solar masses, the Chandrasekhar limit. C) 3 solar masses, the Schwartzschild limit. D) 20 solar masses, the Hubble limit. E) 100 solar masses, the most massive known stars.
A 14-mm tall postage stamp is 4.0 mm from a converging lens. If the image of the stamp is 4.0 mm tall, how far is it from the lens?
A) 14 mm B) 8.7 mm C) 1.4 mm D) 1.1 mm