The two purposes of water in a reactor core are ______
a. neutron absorber and heat transfer liquid
b. neutron moderator and heat transfer liquid
c. neutron moderator and neutron absorber
d. neutron absorber and lubricant
e. neutron moderator and radiation shield
b
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Equilibrium: The mobile shown in the figure is perfectly balanced, and the horizontal supports have insignificant masses. What must be the masses of the suspended objects m1, m2, and m3 to maintain balance?
What will be an ideal response?
What power (in diopters) of corrective contact lens is required to correct the vision of a myopic eye whose far point is at 170 cm?
What will be an ideal response?
The ________ was a particle predicted to exist long before it was observed because energy is not conserved in beta decays without it.
What will be an ideal response?
Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 540 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s)
a. 463 Hz c. 579 Hz b. 540 Hz d. 500 Hz