The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs __________ radiation
Fill in the blank(s) with correct word
infrared
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A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30.0 degrees above the horizontal. The projectile lands on a roof that is 4.00 m height. What is the velocity vector when the projectile hits the roof?
A. Vx = 17.3 m/s, Vy = +13.4 m/s B. Vx = 14.3 m/s, Vy = -3.23 m/s C. Vx = 15.2 m/s, Vy = -13.4 m/s D. Vx = 16.8 m/s, Vy = -3.95 m/s E. Vx = 17.3 m/s, Vy = -13.4 m/s
The second law of thermodynamics states that
A) energy cannot be created or destroyed B) matter cannot be crated or destroyed C) the energy in a system undergoes changes that lead to increasing disorder D) the energy in a system undergoes changes that lead to increasing complexity
Main sequence stars have radii ranging from about 0.03 solar radius to 30 solar radius
Indicate whether the statement is true or false
Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. If there is no air resistance, when they hit the ground
A) both will have the same kinetic energy. B) the heavier one will have twice the kinetic energy of the lighter one. C) the heavier one will have four times the kinetic energy of the lighter one. D) the heavier one will have half the kinetic energy of the lighter one. E) the heavier one will have one-fourth the kinetic energy of the lighter one.