Why is the effect of neutrons on materials such as steel of concern in the design of fusion reactors using the deuterium-tritium reaction?
What will be an ideal response?
As indicated above in Question 26, steel can become embrittled. This is a cause
for concern in terms of plant safety and reliability.
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Total internal reflection
A. Can occur when light travels from lower index of refraction into higher index of refraction. B. Can occur when light travels from higher index of refraction into lower index of refraction. C. Can occur in any combination of indices of refraction. D. Never occurs.
What source of energy might keep water beneath the surface of Enceladus liquid?
A) tidal heating only B) radioactive decay only C) tidal heating and radioactive decay D) heat released from a partially molten core
A certain factory whistle can be heard up to a distance of 2.5 km. Assuming that the acoustic output of the whistle is uniform in all directions, how much acoustic power is emitted by the whistle? The threshold of human hearing is 1.0 × 10-12 W/m2
A) 0.079 mW B) 0.26 mW C) 0.026 mW D) 2.6 mW E) 0.79 mW
An avalanche of ice and snow of mass 1 500 kg slides a vertical distance of 190 m down a mountainside. If the temperature of the ice, snow, mountain and surrounding air are all at 0°C, what is the change in entropy of the universe?
a. 2.05E+4 J/K b. 1.02E+4 J/K c. 5.12E+3 J/K d. 3.41E+3 J/K e. 1.04E+3 J/K