Which form of electromagnetic radiation would be blocked in the stratosphere by ozone?
A) cosmic rays
B) ultraviolet
C) visible light
D) infrared
E) microwaves
B
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For the monochromatic emissive power distribution shown in the figure, determine the radiant energy emitted for (a) The full spectrum, and (b) over the wavelength band of 1 to 2 ?m.
What will be an ideal response?
An ant walks down the surface of a ball. If the ant begins to slip when the normal force is less than one-third of the ant's weight, at what angle, measured from the top of the ball, does the ant begin to slip?
A) 70.5° B) 19.5° C) 55.0° D) 18.4° E) 35.2°
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?
A) g downward B) 0.5g downward C) 2g downward D) g upward E) 2g upward
The highest mountain on Mars is Olympus Mons, rising 22 000 meters above the Martian surface. If we were to throw an object horizontally off the mountain top, how long would it take to reach the surface? (Ignore atmospheric drag forces and use gMars = 3.72 m/s2.)
a. 1.8 minutes b. 2.4 minutes c. 3.0 minutes d. 0.79 minute