A car travels at 15 m/s for 10 s. It then speeds up with a constant acceleration of 2.0 m/s2 for 15 s. At the end of this time, what is its velocity?

A) 15 m/s
B) 30 m/s
C) 45 m/s
D) 375 m/s


C

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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Which radiation has no association with electric charge?

A) alpha B) beta C) gamma D) all of the above E) none of the above

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What are the two parts of a typical X-ray spectrum?

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A nonconducting sphere of radius 10 cm is charged uniformly with a density of 100 nC/m3 . What is the magnitude of the potential difference between the center and a point 4.0 cm away?

a. 12 V b. 6.8 V c. 3.0 V d. 4.7 V e. 2.2 V

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