Friday
December 13, 2013

# Posts by StressedStudent

Total # Posts: 51

Physics
Which kind of pot would be better to use on a halogen cooktop? A. A shiny stainless steel pot B. A black cast iron pot C. It's equally OK to use either as long as you adjust the thickness so that the heat conduction is the same.

Physics
Assuming there is no conduction or convection operating, a cold object in a warm room: A.Radiates more energy than it absorbs B.Absorbs more energy than it radiates C.Only absorbs energy; it does not radiate because it is colder than its environment.

Physics
The igloo shown at the very start of chapter 13 is meant to keep out the cold. Which would work better: an igloo made of ice 15cm thick or an igloo made out of concrete 15cm thick? Ice Concrete

Physics
When you blow on a spoonful of soup to cool it, this is an example of: Natural convection Forced convection Conduction

Physics
A sealed box containing a chunk of ice is made of 2cm thick wood, a good thermal insulator. The air outside the box is warm. It takes the ice one hour to melt. If I had put 2cm of aluminum (a good thermal conductor) around the outside of the box, in contact with the wood, the ...

Physics
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 5.8 x 1028 kg and 1.5 x 103 m. (a) Find the density of such a star. (b) If a dime (V = 2.0 x 10-7 m3) were made from this material, how much would...

Physics
A sealed can is filled completely with methyl alcohol. Which of these materials could the can be made of so that it would not rupture when the whole system was cooled by 20 degrees Celsius? A.)Aluminum B.)Fused quartz C.)Copper D.)Any of these E.)None of these

Physics
Consider a cube of an unknown material. When heated by 10 K, each side expands by 1%. Using *only this information*, what is the ratio between the coefficent of volume expansion and the coefficient of linear expansion (i.e., beta/alpha)? Express your answer to two significant ...

math
Those two values will have the same value if put in the way you wrote it. If the equation was written like: (5+5)^3 it would yield a different amount rather than 5+5^3. So,it all depends on how the equation is written.

physics
The maximum applied force of compression that one man’s thighbone can endure without breaking is 7.6 x104 N. The minimum effective cross-sectional area of the bone is 3 x10-4 m2, its length is 0.54 m, and Young’s modulus is Y=9.4x109 N/m2. The mass of the man is 61 k...

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