All supernova remnants contain pulsars
a. True
b. False
Indicate whether the statement is true or false
False
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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
Which of the above would best describe how soap behaves in water?
A) a B) b C) c D) d E) none of the above
If the hypothesis tracing the extinction of the dinosaurs to an impact is correct, the dinosaurs died off largely because ________
A) the impact caused massive earthquakes worldwide B) radiation from iridium in the asteroid caused the dinosaurs to die of cancer C) of global climate effects initiated by dust and smoke that entered the atmosphere after the impact D) of injuries suffered from direct hits of pieces of the asteroid or comet
Significant Figures: A traveler has about $536 in his checking account, about $2107 in his savings account and exactly $7.62 in his wallet. To the greatest precision warranted, how much money does this shopper have?
A. $2651 B. $2650 C. $2650.6 D. $2650.62 E. $2650.620