A dime is 1.8 cm in diameter. Earth's Moon is 3.844 × 10^10 cm from Earth and has a diameter of 3.76 × 10^8 cm. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full Moon?
a. 200 cm
b. 2 cm
c. 0.2 cm
d. 2 AU
e. 2 LY
a
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The following images represent four types (wavelength bands) of light. Rank these from left to right based on the amount of each that is emitted (as thermal radiation) by Earth’s surface, from greatest to least. If you think that two (or more) types should be ranked as equal, drag one on top of the other(s) to show this equality.
An object has kinetic energy when it is __________
Fill in the blank(s) with correct word
Under what circumstances would a nonzero vector lying in the xy plane have components that are equal in magnitude?
1.This can never happen. 2.Always. Components of vectors are always equal in just two dimensions. 3.Only when the vector lies on the x- or y-axes (0°, 90°, 180°, or 270°). 4.Only when the vector lies 45° from the x- or y-axes (45°, 135°, 225°, or 315°).
One way to heat a gas is to compress it. A gas at 1.00 atm at 25.0°C is compressed to one tenth of its original volume, and it reaches 30.0 atm pressure. What is its new temperature?
a. 1500 K c. 1192°C b. 621°C d. 919°C