A spherical object 25.0 cm in diameter having an emissivity of 0.800 is held at a temperature of 275°C by an internal heater. This object is embedded in a very large vat of water at 100.0°C and atmospheric pressure
At what maximum rate (in g/min) is the water evaporating in the vat due to the radiated heat it receives from the object? You can ignore any heat radiated by the water. The latent heat of fusion for water is 33,400 J/kg, its latent heat of vaporization is 2.26 × 106 J/kg, and the Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 • K4.
21.3 g/min
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Possible units for the coefficient of volume expansion are:
A. mm/C? B. mm3/C? C. (C?)3 D. 1/(C?)3 E. 1/C?
A new theory conforms to the Correspondence Principle when it
1) successfully accounts for the verified results of the old theory. 2) corresponds to all theories of nature. 3) states the essence of the old theory, but in an up-to-date way. 4) successfully ties two or more theories together. The Correspondence Principle is applicable 5) principally at the atomic level. 6) in all realms of physics. 7) for all good theory, scientific or otherwise.
A hockey puck slides off the edge of a table at point A with an initial velocity of 20.0 m/s and experiences no air resistance. The height of the tabletop above the ground is 2.00 m
(a) What is the speed (not the velocity) of the puck just before it touches the ground? (b) What is the distance between point A and the point where the puck hits the ground? What will be an ideal response?
An astronaut in a space capsule is experiencing "weightlessness." Does the astronaut have to exert any effort to throw a bowling ball, since the bowling ball is also weightless?
What will be an ideal response?