If the distance from the Sun to the Earth is represented by roughly 15 meters, then the distance from the Earth to the Moon on the same scale would be
a. about 30 meters.
b. about 10 meters.
c. about 1 meter.
d. small than your hand.
D
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A laser can be used for very accurate measurements of distances between objects
a. True b. False Indicate whether the statement is true or false
Matter Waves: After an electron has been accelerated through a potential difference of 0.15 kV, what is its de Broglie wavelength? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 0.10 nm B. 1.0 nm C. 1.0 mm D. 1.0 cm
According to current evidence, Pluto is best explained as
A) a large member of the Kuiper belt. B) a terrestrial planet that is surprisingly far from the Sun. C) a very small jovian planet. D) an escaped moon of Jupiter or Saturn.
The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ac current in the secondary coil is 2 A, what is the current in its primary coil?
A) 2 A B) 8 A C) 1/2 A D) 1/4 A E) 4 A