Two identical balls are at rest and side by side at the top of a hill. You let one ball, A, start rolling down the hill. A little later you start the second ball, B, down the hill by giving it a shove. The second ball rolls down the hill along a line parallel to the path of the first ball and passes it. At the instant ball B passes ball A:
a. it has the same position and the same velocity as A.
b. it has the same position and the same acceleration as A.
c. it has the same velocity and the same acceleration as A.
d. it has the same displacement and the same velocity as A.
e. it has the same position, displacement and velocity as A.
b
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A mobile phone is pulled northward by a force of 10 N and at the same time pulled southward by another force of 15 N. The resultant force on the phone is
A) 0 N. B) 5 N. C) 25 N. D) 150 N.
Only at the equator are all the stars visible over the course of the year
Indicate whether the statement is true or false
Exhibit 15-1
A dictator has built a bunker for his use in emergencies. Its dimensions are shown below. When it floods to ground level during a tropical storm, air is trapped above the dashed line in the bunker.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 15-1. The absolute pressure at point A, in Pa, is
A. 3.92 × 105. B. 4.90 × 105. C. 5.39 × 105. D. 5.88 × 105. E. 6.89 × 105.
Most of our knowledge of stellar evolution comes from studies of ________
Fill in the blank(s) with correct word