_____ are similar in size

A) Mercury and Earth
B) Earth and Venus
C) Venus and Jupiter
D) Jupiter and Neptune


B

Physics & Space Science

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Which force can act over distances comparable to the distance between planets?

a. only gravitational b. only electrical c. only magnetic d. All of the above.

Physics & Space Science

A spaceship moves at a speed of 0.95 c away from the Earth. It shoots a star wars torpedo toward the Earth at a speed of 0.90 c relative to the ship. What is the velocity of the torpedo relative to the Earth? (The direction in which the spaceship moves is the positive direction.)

a. ?0.34 c b. 0.34 c c. 0.060 c d. ?0.060 c e. 0

Physics & Space Science

The force responsible for chemical bonding is

a. nuclear. b. electromagnetic. c. none of these. d. gravitational.

Physics & Space Science

The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is _____________

a. silica content b. hardness c. color d. grain size

Physics & Space Science