A white dwarf will radiate its heat into space and become a black dwarf after a few ____
a. thousands of years
b. millions of years
c. hundreds of millions of years
d. billions of years
e. hundreds of billions of years
d
You might also like to view...
Which type of nebula is produced when a star, hotter than 25,000 K, excites the gas near it to produce an emission spectrum producing a distinctive pink color?
a. emission nebulae b. H I c. reflection nebulae d. dark nebulae e. spectral type B6
Angular and Linear Quantities: A string is wound tightly around a fixed pulley having a radius of 5.0 cm. As the string is pulled, the pulley rotates without any slipping of the string. What is the angular speed of the pulley when the string is moving at 5.0 m/s?
A. 100 rad/s B. 50 rad/s C. 25 rad/s D. 20 rad/s E. 10 rad/s
A bar magnet is attached solidly to a frictionless surface and its length is aligned with the x axis. To the right of the first magnet a short distance away is a second bar magnet with its center placed on the x axis and its length perpendicular to the x axis. The second magnet is free to move. Once placed in position at rest, which best describes the initial motion of the second magnet?
a. The magnet will move away from the fixed magnet. b. The magnet will not move. c. The magnet will move toward the fixed magnet. d. The magnet will start to rotate.
You are holding your physics book, pushing upwards on it with the palm of your hand. The reaction to the weight of the book is the force on __________ by __________
Fill in the blank(s) with correct word