If a gray opaque body has emissivity of 0.6, what is its reflectivity?
What will be an ideal response?
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A plate falls vertically to the floor and breaks up into three pieces, which slide along the floor
Immediately after the impact, a 320-g piece moves along the x-axis with a speed of 2.00 m/s and a 355-g piece moves along the y-axis with a speed of 1.50 m/s. The third piece has a mass of 100 g. In what direction does the third piece move? You can neglect any horizontal forces during the crash. A) 216.9° from the x-axis B) 219.8° from the x-axis C) 36.9° from the x-axis D) 39.9° from the x-axis E) 39.8° from the x-axis
While luminous enough to be seen with the naked eye, Supernova 1987A was, in fact, in our companion galaxy, the Large Magellanic Cloud
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A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming negligible air resistance?
A) 9.8 m/s upward B) 9.8 m/s downward C) 0 m/s D) 19.6 m/s downward
A light bulb designed for use with AC would still work if hooked up to DC of the proper voltage
Indicate whether the statement is true or false