Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Angular momentum
a. is definitely conserved.
b. is definitely not conserved.
c. may or may not be conserved.
d. none of the above
a
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Recovered strain is _____________strain.
Fill in the blank(s) with the appropriate word(s).
How long does light take to reach us from Proxima Centuri?
a. 4.2 ly b. 4.2 years c. 8.4 AU d. 8.4 km
A lens of focal length 40 mm is used as a magnifier. The object being viewed is 5.3 mm long, and is positioned at the focal point of the lens. The user of the magnifier has a near point at 25 cm
The angular magnification of the magnifier is closest to: A) 6.3 B) 5.6 C) 6.9 D) 7.5 E) 8.1
A satellite is placed in a geosynchronous orbit. In this equatorial orbit with a period of 24 hours, the satellite hovers over one point on the equator. Which statement is true for a satellite in such an orbit?
a. There is no gravitational force on the satellite. b. There is no acceleration toward the center of the Earth. c. The satellite is in a state of free fall toward the Earth. d. There is a tangential force that helps the satellite keep up with the rotation of the Earth. e. The force toward the center of the Earth is balanced by a force away from the center of the Earth.