One light-minute is the distance light travels in one minute. The speed of light is about 300,000 km/s (3×105 km/s). How far is one light-minute?
A) 300 thousand km (300,000, or 3 × 105 km)
B) 9.46 trillion km (9,460,000,000,000, or 9.46 × 1012 km)
C) 1.08 billion km (1,080,000,000, or 1.08 × 109 km)
D) 18 million km (18,000,000, or 1.8 × 107 km)
D
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The time for a planet to revolve around the Sun is its ________
Fill in the blank(s) with correct word
Different units can be used to measure the same physical quantity, differing only by some multiplicative factor. The cgs unit for magnetic field, the gauss, is equal to ________ tesla
a. 104 b. 10–4 c. 0.5 d. These units do not measure the same physical quantity.
At which lunar phase(s) are tides most pronounced (for example, the highest high tides)?
A) both first and third quarters B) both new and full Moons C) full Moon only D) new Moon only E) third quarter Moon only
The position of an air-track cart that is oscillating on a spring is given by x = (12.4 cm) cos[(6.35s-1)t]. At what value of t after t = 0 s is the cart first located at x = 8.47 cm?
A) 4.34 s B) 0.108 s C) 0.129 s D) 7.39 s E) 7.75 s