__________ radiation is emitted from a small hole in a furnace
Fill in the blank(s) with correct word
Blackbody
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Which of the following would lead to a warmer temperature for a planet?
A) a decrease in the planet's reflectivity B) a decrease in the planet's amount of greenhouse gases C) a decrease in the brightness of the Sun D) a decrease in the number of volcanic eruptions on the planet
A foul ball is hit straight up into the air with a speed of 30 m/s, and air effects are negligible. (a) Calculate the time required for the ball to rise to its maximum height
(b) Calculate the maximum height reached by the ball above the point where it hit the bat. (c) Determine the times at which the ball passes a point 25 m above the point where it was hit by the bat. (d) Explain why there are two answers to part (c).
A horse and rider travel in a region in which the vertical component of the Earth’s magnetic field is 0.035mT, while the horizontal component is 0.022mT. Attached to the horse’s bridle is a metal bit, a cylinder approximately 15cm long, in the horse’s mouth that is oriented horizontally. If the horse is galloping at 15m/s, what is the induced potential difference between the ends of the bit?
A. 79mV B. 93mV C. 50?V D. 93?V E. 50mV F. 79?V
A ball is thrown straight up with an initial velocity of 10 m/s. After 3 seconds its velocity will be
A. 29.4 m/s. B. 19.4 m/s. C. -19.4 m/s. D. 0 m/s. E. -29.4 m/s.