The radius of Earth's mantle is about
a. 870 km.
b. 2900 km.
c. 1050 km.
d. 5800 km.
b
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What type of galaxies do astronomers believe to be the most common?
a. Elliptical b. Spiral c. Irregular d. Astronomers have no idea which type of galaxy is more common.
The ____________ was a large cyclonic storm in the atmosphere of Neptune observed by Voyager 2
Fill in the blank(s) with correct word
A one-kilogram gold ingot is carried from the bottom of the Eiffel tower to the top, 300 m above ground level. By what amount does its mass change?
A) Its mass does not change. B) Its mass increases by 3.27 × 10-14 kg. C) Its mass decreases by 3.27 × 10-14 kg. D) Its mass increases by 1.64 × 10-14 kg. E) Its mass decreases by 1.64 × 10-14 kg.
An object requires a force of 30 N to hold it under water. The object weighs 90 N in air. Its density is nearest:
