Ancient astronomers often had difficulty explaining _____, the occasional westward motion of the planets
a. parallax
b. eccentrics
c. retrograde motion
d. deferents
e. epicycles
c
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Bricks have been made for centuries by baking them in direct sunlight. Determine the time required to complete the baking if water is driven off at 95ºF and it requires 7000 Btu for each brick. Each brick is 4 inches by 6 inches by 8 inches and the surface emissivity is 0.4.
What will be an ideal response?
Two masses, A and B, are attached to different springs. Mass A vibrates with an amplitude of 8 cm at a frequency of 10 Hz and mass B vibrates with an amplitude of 5 cm at a frequency of 16 Hz
How does the maximum speed of A compare to the maximum speed of B? A) Mass A has the greater maximum speed. B) Mass B has the greater maximum speed. C) They are equal.
Write the energy balance for an adiabatic heat exchanger.
What will be an ideal response?
The Pleistocene is a(n)
a. epoch. b. era. c. eon. d. period.