The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs ultraviolet radiation
a. True
b. False
Indicate whether the statement is true or false
False
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Thin Films: When a light wave enters into a medium of different refractive index,
A. only its speed and frequency change. B. only its speed and wavelength change. C. only its frequency and wavelength change. D. its speed, frequency, and wavelength change.
Shapley correctly argued that the rotation of the spiral nebulae proved they could not be very distant
Indicate whether the statement is true or false
Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is
A) half as much. B) the same. C) twice as much. D) four times as much. E) none of the above
An object floats with half its volume beneath the surface of the water. The weight of the displaced water is 2000 N. What is the weight of the object? The density of water is 1000 kg/m3
A) 1000 N B) 4000 N C) 2000 N D) It cannot be determined because we do not know the volume of the object.