____ is a form of electromagnetic radiation produced by rapidly moving electrons spiraling through magnetic fields
a. Lagrangian radiation
b. Accretion
c. Ultraviolet radiation
d. Synchrotron radiation
e. Infrared radiation
D
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Excessive force must be intentional.
Indicate whether the statement is true or false
Which of the following masses separates low mass stars from high mass stars?
A) about 50 solar masses B) about 1 solar mass C) about 2 solar masses D) about 150 solar masses E) about 0.08 solar masses
A movie projector is equipped with a 0.5-meter focal length lens that is positioned 0.506 meters from the film. (a) How far from the lens must the screen be if the image on it is to be in focus? (b) How many times larger is the image than the object? (c) Is the image produced a real or a virtual image?
An astronomical telescope has a barrel length of 33 cm and an angular magnification of 10. What are the focal lengths of the objective and the eyepiece in that order?
A. 0.3 m, 3 m B. 30 cm, 3 cm C. 20 cm, 13 cm D. 3 cm, 30 cm