An object is 50 cm from a concave mirror of radius of curvature of magnitude 60 cm. How far is the image from the mirror?
A) 19 cm
B) 35 cm
C) 60 cm
D) 75 cm
E) 120 cm
D
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The initial mass of a protostar generally determines the star's future evolution. But in some cases, what can alter this process?
A) The star may be isolated in space, far from other influences. B) The star may gain mass by passing through a dark cloud. C) The star may be in a spectroscopic binary system. D) The star may drift away from the other stars in its formation cluster. E) The star may collide with another, unrelated star.
A student adds two displacement vectors that have the magnitudes of 14.0 m and 6.0 m. What is the range of possible answers for the magnitude of the resultant vector?
What will be an ideal response?
The supernova that formed M-1, the Crab Nebula, was observed in
A) 1572 AD by Tycho Brahe. B) 1604 AD by Johannes Kepler. C) 1054 AD by Chinese and Middle Eastern astronomers. D) 1006 by observers in the southern hemisphere. E) about 9,000 BC by all our ancestors.
Your vocal cords are used to produce all the sounds you make while speaking
Indicate whether the statement is true or false