The time for one cycle of a periodic process is called the
A)
amplitude.
B)
wavelength.
C)
frequency.
D)
period.
E)
pulse.
D
You might also like to view...
The following figures show a top view of Earth, sunlight, and six different positions of the Moon as it orbits Earth. Note that the distances shown are not drawn to scale. Rank each of the six lunar positions from left to right based on the amount of the Moon’s illuminated surface that is visible from Earth, from greatest to least. (If two diagrams have an equal amount of illumination as seen from Earth, put one on top of the other.)
Can an asteroid also be a dwarf planet?
A) No; dwarf planets have different compositions from asteroids. B) No; asteroids are too big to be considered "dwarfs." C) Yes, if the asteroid is large enough for its gravity to have made it round. D) Yes, all asteroids are considered to be dwarf planets.
If Jupiter were about 80 times more massive than it is, nuclear fusion should have been possible, making it a small star. What might have been the most likely effect on the Earth?
A) The gravitational pull might have prevented the Earth settling into a stable orbit, which would have prevented the development of life on Earth. B) Jupiter's moons would have been likely to develop life, which would have competed with life on Earth. C) The extra radiation from a second star in the solar system would have prevented life forming on Earth. D) Jupiter's magnetic field would have been much larger, disrupting Earth's magnetic field. E) Nothing because Jupiter is so much further from the Earth than the Sun is.
A two-shell-eight-tube-pass heat exchanger condenses 3 kg/s of ammonia at 45ºC using 65 kg/s of water at 20ºC. If the ammonia enters as saturated vapor, leaves as saturated liquid, and has a heat of vaporization of 1078 kJ/kg, determine (a) outlet water temperature and (b) heat exchanger effectiveness.
What will be an ideal response?