An atom has 98 protons and 249 nucleons. If it undergoes alpha decay, what are the number of protons and nucleons, respectively, in the daughter nucleus?
A) 100, 245
B) 94, 247
C) 96, 245
D) 96, 247
E) 100, 249
C
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A) increases. B) decreases. C) remains the same.
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A 0.30-m-radius automobile tire accelerates from rest at a constant 2.0 rad/s2 over a 5.0-s interval. What is the tangential component of acceleration for a point on the outer edge of the tire during the 5.0-s interval?
a. 33 m/s2 b. 6.7 m/s2 c. 0.60 m/s2 d. 0.30 m/s2