The ozone layer
a. reflects all EM waves.
b. reflects high frequency radio waves.
c. reflects low frequency radio waves.
d. is responsible for the greenhouse effect.
e. absorbs ultraviolet light in sunlight.
e
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The energy from an AGN is produced by
a. the collision of two spiral galaxies. b. the collision of two elliptical galaxies. c. the collision of two radio jets. d. matter flowing into a supermassive black hole. e. supernovae.
Because of its axial tilt and more elliptical orbit, Mars' polar caps change size even more than the Earth's do
Indicate whether the statement is true or false
A 2200-kg auto moving northward at 12.0 m/s runs into a 3800-kg truck which is also moving northward, but at 5.00 m/s. If the vehicles lock bumpers, how fast are they moving just after the collision?
What will be an ideal response?
Grandfather clocks are designed in a way that the weight at the bottom of the pendulum can be moved up or down by turning a small screw. Suppose you have a grandfather clock at home that runs slow
Should you turn the adjusting screw so as to raise the weight or lower the weight? A) Raise it. B) Lower it. C) It doesn't matter if you raise or lower the weight as long as you displace it by the right amount. D) It doesn't matter if you raise or lower the weight, as long as you displace it with the correct initial velocity. E) Raising or lowering the weight doesn't help. The screw is there so that you can add or take away weight.