Which example involves the transformation of chemical energy directly into light energy?

a) a wind mill
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b) a glow stick
c) photosynthesis
d) a hydroelectric dam

The eel has a certain amount of rotational kinetic energy when spinning at 14 spins per second. if it swam in a straight line instead, about how fast would the eel have to swim to have the same amount of kinetic energy as when it is spinning?

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Asher cycles 12 miles in 16 hours. what is his speed?