When you hold one end of a solid rod in a fire, the other end becomes hot because of heat convection
a. True
b. False
Indicate whether the statement is true or false
False
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Four things that the resistance of a conducting material depends on are __________, __________, __________ and ___________
Fill in the blank(s) with correct word
Two charges lie on the x axis, +2q at the origin, and -3q at x = 5.0 m. The point on the x axis where the electric potential has a zero value (when the value at infinity is also zero) is
a. 1.0 m. b. 2.0 m. c. 2.5 m. d. 3.0 m. e. 4.0 m.
what are the two forces that compete with each other to determine the ultimate fate of a star?
What will be an ideal response?
Ethanol is to be condensed around cool 10ºC tubes of 1 cm outside diameter and at a 50 saturation temperature of 78.5ºC. Plot the heat transfer per unit length on horizontal tubes arranged as shown in Figure 10-17b and as predicted by Equation 10-49 as the number of tubes is increased. How does this result compare to the heat transfer predicted for a single tube or for a dripping, in-line tube arrangement as shown in Figure 10-17c? Ethanol has a heat of vaporization hnfg of 842 J/kg at atmospheric pressure.
