A wave with a period of .01 seconds has a frequency of ________ Hz
Fill in the blank(s) with correct word
100
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Thin Lenses: Is it possible to see a virtual image?
A. No, since the rays that seem to emanate from a virtual image do not in fact emanate from the image. B. No, since virtual images do not really exist. C. Yes because the rays that appear to come from a virtual image can be focused by the eye just like those from an object. D. Yes, but only by using an additional lens to form a real image before the light reaches the eye.
A centrifuge in a medical laboratory rotates at a rotational speed of 3600 rev/min. When switched off, it makes 50 complete turns at a constant angular acceleration before coming to rest
(a) What was the magnitude of the angular acceleration of the centrifuge as it slowed down? (d) How long did it take for the centrifuge to come to rest after being turned off?
Even Jupiter and Saturn experience auroras like those on Earth
a. True b. False Indicate whether the statement is true or false
A moon is in orbit around its mother planet. Which of the following statements is always true about its kinetic energy (K), and its gravitational potential energy (U)?
A) K is negative, and U is negative. B) K is negative, and U is positive. C) K is positive, and U is negative. D) K is positive, and U is positive.