Electromagnetic waves with a wavelength of about 0.1 nm (about the size of an atom) are in which range?

A. Radio
B. Microwave
C. Infrared
D. Visible
E. Ultraviolet
F. X-ray
T. Gamma ray


F. X-ray

Physics & Space Science

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A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going upwards

a. the velocity and acceleration both point up b. the velocity points up and the acceleration down c. the velocity points down and the acceleration up d. the velocity and acceleration both point down e. the acceleration is zero

Physics & Space Science

Constant Angular Acceleration: An old 78 rpm record rotates through an angle of 320° as it slows down uniformly from 78.0 rpm to 22.8 rpm. What is the magnitude of the angular acceleration of the record?

A. 2.34 rad/s2 B. 5.46 rad/s2 C. 6.50 rad/s2 D. 8.35 rad/s2 E. 10.9 rad/s2

Physics & Space Science

What makes the North Star, Polaris, special?

A) It is the brightest star in the sky. B) It is the star straight overhead. C) It appears very near the north celestial pole. D) It is the star directly on your northern horizon. E) It can be used to determine your longitude on Earth.

Physics & Space Science

The water level in identical bowls, A and B, is exactly the same. A contains only water; B contains floating ice as well as water. When we weigh the bowls, we find that

a. WA < WB. b. WA = WB. c. WA > WB. d. WB > WA if the volume of the ice cubes is greater than 1/9 the volume of the water. e. WB > WA if the volume of the ice cubes is greater than 9 times the volume of the water.

Physics & Space Science