Specific gravity is a number representing the ratio of a mineral's weight to the weight of an equal volume of water.
TRUE
FALSE
TRUE
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A stage 4 object can be plotted on the H-R diagram. At this stage, the star will appear:
A) in the middle left of the diagram. B) in the middle right of the diagram. C) just on the bottom right of the main sequence. D) down and to the left of where it will be when it is a main sequence star. E) in the middle of the main sequence.
If the speed of a continuous wave is constant, as you increase the frequency of the wave, the wave must have a proportionally _________ wavelength
Fill in the blank(s) with correct word
Slanting Surfaces With Friction: A 50.0-kg block is being pulled up a 16.0° slope by a force of 250 N that is parallel to the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
A. 0.528 m/s2 B. 0.158 m/s2 C. 0.412 m/s2 D. 0.983 m/s2 E. 0.260 m/s2
A ruby laser beam (l = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
a. 500 m b. 250 m c. 120 m d. 1.0 km e. 2.7 km