A marathon is 26mi and 385yd long. Estimate how many strides would be required to run a marathon. Assume a reasonable value for the average number of feet/stride
A) 4.5 × 106 strides B) 4.5 × 104 strides C) 4.5 × 105 strides D) 4.5 × 103 strides
B
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Estimation: A reasonable estimate for the duration of a typical physics lecture is
A. 600 s. B. 1000 s. C. 3500 s. D. 10,000 s.
A hunter notches a 0.05-kg arrow in a compound bow and draws the arrow back to set the bow. The hunter does 50 J of work in the process setting the bow/arrow combination and then releases the arrow. The speed of the arrow is ___________
Fill in the blank(s) with correct word
The gravitational force between two objects is inversely proportional to
A) the distance between the two objects. B) the square of the distance between the two objects. C) the product of the masses of the two objects. D) the square of the product of the masses of the two objects. E) none of the above
The overall direction of change in the universe is toward
A. a state of increased mass in the universe. B. a state of greater disorder. C. a state of increased organization. D. increased energy content of the universe.