SECTIONS 1.8 and 1.9 (The Relativity of Time and Evidence for Time Dilation) 1.19An athlete runs...
1.19 An athlete runs the 100-meter dash at 10 m/s. How much will her watch gain or lose, as compare ground-based clocks, during the race? [Hint: You will need to use the binomial approximation (1.6) .]
An athlete runs 9 km in 46.9 min, as measured by a friend at rest relative to the Earth. The runner also measures the time with a watch. By how much do the two time measurements differ? (Hint: Use the binomial approximation.)
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
Please read the article and answer about questions. You and the Law Business and law are inseparable. For B-Money, the two predictably merged when he was negotiat- ing a deal for his tracks. At other times, the merger is unpredictable, like when your business faces an unexpected auto accident, product recall, or government regulation change. In either type of situation, when business owners know the law, they can better protect themselves and sometimes even avoid the problems completely. This chapter...