The Hubble Space Telescope only detects visible light.
Answer the following statement true (T) or false (F)
False
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Determine the heat transfer and fin efficiency for a copper fin shown in Figure 2-72. The fin can be assumed to be very long and its base temperature taken as 200ºF.
The diagram above shows the life track of a 1 MSun protostar from the time it first begins to form until it reaches the main sequence, with four stages labeled. What is happening to the protostar's surface temperature and luminosity during Stage 3, when it is undergoing radiative contraction and its life track moves up and to the left?
A) Its surface temperature and luminosity increase. B) Its surface temperature remains the same and its luminosity decreases. C) Its surface temperature and luminosity decrease. D) Its surface temperature decreases and its luminosity increases. E) Its surface temperature and luminosity remain the same.
What is the Q of the reaction 
The rest mass of the proton is 938 MeV/c2 and of the neutral point is 135 MeV/c2
A. 187 MeV B. 135 MeV C. 938 MeV D. -187 MeV E. -135 MeV
Compared to the primary voltage, the secondary voltage can be
A) higher. B) lower. C) the same. D) any of the above E) none of the above