At the chemical composition of iron and 4.26 weight percent carbon and a temperature of 1153°C, there is a(n) _________reaction.
Fill in the blank(s) with the appropriate word(s).
eutectic
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Which of the following describes the most convincing evidence in support of the idea that human activity is causing climate change on Earth?
A) Polls show that a majority of Americans agree that this is the case. B) The vast majority of scientists say so. C) The known science behind the greenhouse effect predicts that warming should be occurring as the carbon dioxide concentration rises, and the average temperature is rising as expected. D) There is no other known process besides the burning of fossil fuels that can lead to any change in Earth's average temperature.
An object weighs 432 N on the surface of the earth. The earth has radius R. If the object is raised to a height of 3R above the earth's surface, what is its weight?
A) 108 N B) 48.0 N C) 27.0 N D) 305 N E) 144 N
For the design of novel type of nuclear power plant, it is necessary to determine the temperature distribution in a large slab-type nuclear fuel element. Volumetric heat is generated uniformly in the fuel element at the rate of 2*107 W/m3 . This slab fuel is insulated on one side, while on other side it is covered by a stainless steel cladding of 0.3 cm thickness. Heat is removed from the fuel slab by a liquid at 2000C that flows on the other side of the steel cladding with the convective heat transfer coefficient of 10,000 W/(m2 K). Determine the maximum temperature in the fuel element and sketch the temperature distribution.
GIVEN
FIND
Maximum temperature in fuel element
Sketch temperature distribution.
ASSUMPTIONS
• 1 Dimensional steady state heat transfer
• Constant properties.
• Uniform heat generation.
• Negligible contact resistance between surfaces.
SKETCH
According to Kepler's laws the Sun is located at one of the foci of Earth's orbit.
Answer the following statement true (T) or false (F)