Graphical Analysis: The figure shows a graph of the velocity of an object as a function of time. What is the average acceleration of the object over the following time intervals?(a) From t = 0 s to t = 5.0 s(b) From t = 0 s to t = 8.0 s
What will be an ideal response?
(a) 2.0 m/s2 (b) -2.5 m/s2
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Radiation Doses: A 70-kg researcher absorbs 4.5 × 108 neutrons in a work day, each of energy 1.2 MeV. The relative biological effectiveness (RBE) for these neutrons is 10. What is the equivalent dosage of the radiation exposure for this researcher, in millirem?
A. 1.2 mrem B. 0.39 mrem C. 0.77 mrem D. 3.7 mrem E. 12 mrem
Suppose a car has a 100,000 mile 10 year warranty on the wheels and axles of a car. How may turns will the wheels of 0.80-m diameter make if both the mileage and time warranties run out simultaneously and what will be the average angular velocities of the wheel? Assume that a mile = m and that a year is s.
The unit of electrical potential, the volt, is dimensionally equivalent to:
a. J/C. c. F×C. b. J×C. d. C/J.
Maria throws two stones from the top edge of a building with a speed of 22 m/s. She throws one straight down and the other straight up. The first one hits the street in a time t1 . How much later is it before the second stone hits?
a. 5.5 s b. 4.5 s c. 3.5 s d. 6.5 s e. Not enough information is given to work this problem.