On which planet would you experience the highest gravitational acceleration?
1.on one with twice the radius of the Earth and twice the mass
2.on one with half the radius of the Earth and half the mass
3.on the Earth
4.on one with twice the radius of the Earth and half the mass
2
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A geophysicist measures the magnetic force on a proton that is moving vertically downward at a point 1.996 km/s at the earth's equator. At that location, the earth's magnetic magnetic field is horizontal and has a strength of 0.40 × 10-4 T
What are the magnitude and direction of the force she will measure? (e = 1.60 × 10-19 C)
Of the possible statements that parallel rays are brought to a focus by a 1) concave mirror, 2) convex mirror, 3) converging lens, 4) diverging lens, the correct answer is
a. 1 and 2. b. 3 and 4. c. 1 and 3. d. 2 and 3. e. 2 and 4.
If the diameter of a radar dish is doubled, what happens to its resolving power, assuming that all other factors remain unchanged?
A) The resolving power does not change unless the focal length changes. B) The resolving power is reduced to 1/4 of its original value. C) The resolving power is reduced to 1/2 of its original value. D) The resolving power doubles. E) The resolving power quadruples.
According to Hubble's Law, the greater a galaxy's redshift, the:
A) closer it is to us. B) younger it is. C) faster it's approaching us. D) farther it is from us. E) greater its mass.