Conduction: A heat-conducting rod that is wrapped in insulation is constructed with a 0.15-m length of alloy A and a 0.40-m length of alloy B, joined end-to-end. Both pieces have cross-sectional areas of 0.0020 m2. The thermal conductivity of alloy B is known to be 1.8 times as great as that for alloy A. The end of the rod in alloy A is maintained at a temperature of 10°C, and the other end of the rod is maintained at an unknown temperature. When steady state flow has been established, the temperature at the junction of the alloys is measured to be 40°C, and the rate of heat flow in the rod is measured at 56 W. What is the temperature of the end of the rod in alloy B?
A. 80°C
B. 84°C
C. 88°C
D. 92°C
E. 96°C
Answer: B
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Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has zero velocity and negative acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E
Is the decay ?+ ? p + ?+ allowed?
A) No, because lepton number is not conserved. B) No, because mass is created. C) Yes, because it conserves energy. D) No, because charge is not conserved.
Saturn's rings are composed of?
A) chunks of ice and rock B) methane gas C) hydrogen D) old satellites and other space junk lost from Earth's orbit and other space missions
An absorption spectrum is also called a bright-line spectrum
a. True b. False Indicate whether the statement is true or false