Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is 69 beats/min and a life span of 75 years
A) 3 × 109 beats
B) 3 × 108 beats
C) 3 × 1010 beats
D) 3 × 107 beats
A
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A 1 cm diameter thick shield is placed around a furnace. What diameter holes should be put in the shield so that 50% of the incident radiation on the hole passes through?
What will be an ideal response?
Graphical Analysis: If the velocity versus time graph of an object is a horizontal line, the object is
A. moving with zero acceleration. B. moving with constant non-zero acceleration. C. at rest. D. moving with increasing speed.
Where are the Trojan asteroids located?
A) on orbits that cross Earth's orbit B) along Jupiter's orbit, 60° ahead of and behind Jupiter C) surrounding Jupiter D) in the center of the asteroid belt E) on orbits that cross Mars's orbit
The notation s-1 means the same thing as
a. 1/s b. Hz c. per second d. none of the above