If a net external force acts on a system, what will change?
a. The sum of the momenta of all objects in the system.
b. The momentum of no more than one object in the system.
c. The sum of the magnitudes of each momentum.
d. The momentum of exactly one object in the system.
e. The momenta of all but one of the objects in the system.
a
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Both space and time are warped near the strong gravitational fields of neutron stars and black holes
Indicate whether the statement is true or false
The resolving power of an optical telescope with a diameter of 232 cm is
a. 0.05 arc seconds. b. 232 arc seconds. c. 2.32 arc seconds. d. 5 arc seconds. e. 11.6 arc seconds.
Why is Saturn's moon Titan able to retain an atmosphere?
a. Titan only contains light gases which are easy to retain. b. Titan has a large enough mass and is cold enough. c. Titan is biologically active. d. It is so close to Saturn that Saturn's gravity retains Titan's atmosphere.
When light enters glass from air, which of these properties of the light change?
a. frequency b. wavelength c. speed d. all of the above