Physics, 15.11.2019 23:31, BIKRAMlawati5544
A500.0-g chunk of an unknown metal, which has been in boiling water for several minutes, is quickly dropped into an insulating styrofoam beaker containing 1.00 kg of water at room temperature (20.0∘c). after waiting and gently stirring for 5.00 minutes, you observe that the water’s temperature has reached a constant value of 20.0∘c.
(a) assuming that the styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal?
(b) which is more useful for storing thermal energy: this metal or an equal weight of water? explain.
(c) if the heat absorbed by the styrofoam actually is not negligible, how would the specific heat you calculated in part (a) be in error? would it be too large, too small, or still correct? explain.
Answers: 1
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Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above
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An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2
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A500.0-g chunk of an unknown metal, which has been in boiling water for several minutes, is quickly...
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