Suppose we could magically double the mass of the moon, double the mass of Earth, and double the distance between Earth and the moon, all at the same time. How would this affect the force that the moon exerts on Earth?
A) The force would be halved.
B) The force would be quadrupled.
C) The force would be doubled.
D) The force would be unchanged.
E) The force would be multiplied by eight.
D
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During a total lunar eclipse, which of the following are true? I. The photosphere of the sun is obscured by the moon. II. The moon is in Earth's umbra. III. The moon is new. IV. The moon is full
a. I, III b. II, IV c. I, II, III d. II, III e. I, II, III, IV
Collisions in Two Dimensions: A 1500-kg car traveling at 90 km/h toward the east suddenly collides with a 3000-kg car traveling at 60 km/h toward the south. The two cars stick together after the collision. What is the direction of motion of the cars after collision?
A. 36.9° S of E B. 36.9° E of S C. 53.1° S of E D. 53.1° E of S
In an elastic solid there is a direct proportionality between strain and:
a. elastic modulus. c. cross-sectional area. b. temperature. d. stress.
In the context of the Sun's surface glowing when hot, yellow-hot is hotter than red-hot but not as hot as white-hot
Indicate whether the statement is true or false