According to the special theory of relativity, if a 35 year old astronaut sent on a space mission is accelerated to speeds close to that of light, and then returns to Earth after 20 years as measured on earth, what would be his biological age upon returning?
a. less than 55 years
c. exactly 110 years
b. more than 55 years
d. 55 years
A
You might also like to view...
The thermal conductivity of copper is 397 J/s/m/°C and of silver is 427 J/s/m/°C. A rod of each material is used as a heat conductor. If the rods have the same geometry and are used between the same temperature differences for the same time interval, what is the ratio of the heat transferred by copper to the heat transferred by the silver?
a. 0.930 b. 1.395 c. 2.093 d. 0.465 e. 0.791
A rocket with a mass of 2.0 × 106 kg is designed to take off from the surface of the earth by burning fuel and ejecting it with an exhaust speed of 3500 m/s
What is the minimum rate at which the fuel should be consumed in order to attain liftoff? A) 5.6 × 103 kg/s B) 1.4 × 103 kg/s C) 1.8 × 103 kg/s D) 2.8 × 103 kg/s E) 18 × 103 kg/s
Inside your apartment, you blow up a balloon as large as possible and then take it outside on a hot summer day. The balloon is most likely to then
A. shrink. B. remain the same size. C. expand and pop.
The temperature coefficient of resistivity for copper is 0.0068°C-1. If a copper wire has a resistance of 104 ? at 20°C, what is its resistance 80°C?
A) 192 ? B) 42 ? C) 71? D) 161 ? E) 146 ?