During the full moon phase, how much of the illuminated portion of the Moon's surface is visible from Earth?
What will be an ideal response?
All of it
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A ball is launched from ground level at 25 m/s at an angle of 31° above the horizontal. How far does it go before it is at ground level again?
a. 34 m b. 94 m c. 28 m d. 56 m e. 14 m
Saturated liquid water flows through 2 cm ID stainless steel tubes at 200 g/s. The water is at 80ºC and the inside surface of the tubes is 200ºC. (a) Determine the convection heat transfer to the water per unit length of tube and (b) predict the convective heat transfer after ten years when the inside of the tubes is coated with a film so that the ID is now 1.9 cm and has a toughness of 0.2mm.
What will be an ideal response?
Suppose it is January and the Sun remains above your horizon all day long. Where must you be located?
A) at the South Pole B) at the North Pole C) somewhere between the Antarctic Circle and the South Pole D) somewhere between the Arctic Circle and the North Pole
Compared to ultraviolet waves, the frequency of infrared waves is
A) lower. B) the same. C) higher.