___________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies
a. Ring galaxies
b. Spiral galaxies
c. Rotation curves
d. Tidal tails
e. Irregular galaxies
d
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A uniform 135-g meter stick rotates about an axis perpendicular to the stick passing through its center with an angular speed of 3.50 rad/s. What is the magnitude of the angular momentum of the stick?
A) 0.0739 kg ? m2/s B) 0.0394 kg ? m2/s C) 0.158 kg ? m2/s D) 0.0236 kg ? m2/s E) 0.473 kg ? m2/s
The Tonga Trench in the Pacific Ocean is 36,000 feet deep. Assuming that sea water has an average density of 1.04 g/cm3, calculate the absolute pressure at the bottom of the trench in atmospheres
A) 1.1 × 103 atm B) 1.1 × 108 atm C) 1.1 × 105 atm D) 1.1 × 106 atm E) 2.1 atm
Weight and g: A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity at the surface of the earth?
A. g B. g/2 C. g/4 D. g/8 E. g/16
A 750 N box moves at a constant velocity on a floor with a coefficient of static friction = 0.800 and coefficient of kinetic friction = 0.600. What horizontal force is required to keep the box moving?
A. 600 N B. 550 N C. 500 N D. 450 N E. 750 N