The Mohorovicic discontinuity occurs because of a
A) change in temperature with depth.
B) shift in the density of minerals with the same composition.
C) change in the composition of rocks on both sides of the boundary.
D) density change in rocks of the same composition on both sides of the boundary.
Answer: C
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Free Fall: Two objects are thrown from the top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the street? Neglect air resistance.
A. The one thrown up is traveling faster. B. The one thrown down is traveling faster. C. They are traveling at the same speed. D. It is impossible to tell because the height of the building is not given.
Some parts of the Sun rotate faster than other parts
Indicate whether the statement is true or false
A smooth distribution of radiation across a broad range of wavelengths is referred to as
A) an emission line spectrum B) an absorption line spectrum C) a continuous spectrum D) a broad spectrum
Snell's Law: A light ray in glass arrives at the glass-water interface an an angle of ? = 48° with the normal. The refracted ray in water makes an angle ? = 72° angle with the normal, as shown in the figure.The index of refraction of water is 1.33. The angle of incidence is now changed to ? = 37°. What is the new angle of refraction ? in the water?
A. 50° B. 48° C. 46° D. 52° E. 54°