A(n) ____ is a small circle whose center is located on the circumference of another larger circle

a. equant
b. deferent
c. retrograde loop
d. ellipse
e. epicycle


e

Physics & Space Science

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The expansion of a star to giant or supergiant size _____, and so the stars move toward the upper right in the Hertzsprung-Russell (H-R) diagram

A) contracts the star drastically B) cools the star's outer layers C) dims the star D) makes the star less luminous

Physics & Space Science

With each pass of a comet about the Sun, its masss

A) is appreciably reduced. B) remains virtually unchanged. C) actually increases.

Physics & Space Science

A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?

A. 2.4 J B. 9.6 J C. 5.4 J D. 0.6 J E. 6.0 J

Physics & Space Science

Two police cars have identical sirens that produce sound of frequency of 570 Hz. A stationary listener is standing between two cars

One car is parked and the other is approaching the listener and both have their sirens on. The listener measures 9.0 beats per second. Find the speed of the approaching police car. The speed of sound is 340 m/s.

Physics & Space Science