How do we know the shape of the universe?
A) By observing distant stars during eclipses of the sun.
B) By observing the light from distant stars and one star passes in front of another star.
C) From the comparison between the pulsations coming from distant neutron stars.
D) By triangulation measurements involving the distances to the sun and to the moon.
E) By observation of the angular size of a typical wavelike disturbance in the cosmic microwave background.
E
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The Galactic Year is the time for our solar system to orbit the Galaxy; it is about
A) 15 million years. B) 225 million years. C) 4.5 billion years. D) 9.6 billion years. E) 13.5 billion years.
In an LC circuit with an inductance of 40 mH and capacitance of 1.2 mF, the maximum charge on the capacitor is 45 mC during the oscillations which occur. What is the maximum energy stored by the inductor during the oscillations?
A) 1.7 mJ B) 0.84 J C) 0.84 mJ D) 1.7 J E) 1.125 mJ
Rays from a distant object do not diverge enough for a nearsighted person to focus; this can be corrected with a
A. converging or positive lens. B. diverging or positive lens. C. converging or negative lens. D. diverging or negative lens.
The work done by the gas is negative for an
A) isothermal compression. B) adiabatic expansion. C) isothermal expansion. D) isometric process.