According to Edwin P. Hubble's discovery in 1929, the sizes of galaxy redshifts are:
A) proportional to the number of stars in the galaxy.
B) inversely proportional to galaxy distances.
C) inversely proportional to the number of stars in the galaxy.
D) proportional to galaxy distances.
D
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A foul ball is hit straight up into the air with a speed of 30.0 m/s
(a) Calculate the time required for the ball to rise to its maximum height. (b) Calculate the maximum height reached by the ball. (c) Determine the time at which the ball pass a point 25.0 m above the point of contact between the bat and ball. (d) Explain why there are two answers to part (c). What will be an ideal response?
A fossil is found in a layer of strata above another layer dated at 10 million years and below another layer dated at 5 million years. From this we can deduce the age of the fossil to be
A) older than 10 million years B) younger than 5 million years C) we can tell nothing about the fossil's age from this data D) between 5 and 10 million years old
A ball rolls without slipping down incline A, starting from rest. At the same time, a box starts from rest and slides down incline B, which is identical to incline A except it is frictionless. Which has a larger translational speed at the bottom of the ramp?
1.They have the same translational speed at the bottom of the ramp. 2.the ball 3.the box 4.It is impossible to determine.
The number of cycles of a periodic process that occur per unit time is called the __________
Fill in the blank(s) with correct word