A radiation pyrometer is a device that uses radiant heat to measure the temperature of a surface. Assume that a pyrometer has a surface area of 5 cm^2 and is at a temperature of 20ºC when directed towards a furnace opening having a temperature of 1100ºC. Estimate the net rate of heat transfer towards the pyrometer if black body radiation is assumed.
What will be an ideal response?
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Imagine that at a certain place in a river, water moves horizontally to the left. Consider an oriented sur-face that faces in a direction that is 30° upward of right. The flux of water velocity through this surface is
A. positive. B. negative. C. zero. D. Impossible to determine from the given information
In the absence of a greenhouse effect, what would happen to Earth's oceans?
a. They would evaporate. b. They would freeze over. c. They would be rapidly absorbed into the surface rocks. d. They would dissociate into ozone and hydrogen.
A wood stove in the corner of a cabin causes the entire cabin to become heated. This is an example of __________
Fill in the blank(s) with correct word
The horizontal acceleration of a projectile
a. is zero b. stays constant c. continuously increases d. continuously decreases e. sometimes decreases and sometimes increases