How much thermal energy must be removed from 456 g of water at 25.0°C to change it into ice at -10.0°C?
The specific heat of ice is 2090 J/kg ? K, the latent heat of fusion of water is 33.5 × 104 J/kg, and the specific heat of water is 4186 J/kg ? K.
A) 105 kJ
B) 153 kJ
C) 57.3 kJ
D) 47.7 kJ
E) 210 kJ
E
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A solarium is approximated by the rectangular parallelogram shown. The floor is well insulated and all walls and ceiling have emissivity of 0.2. The floor temperature is 40ºF, the wall and ceiling temperature is 67ºF, and the window temperature is 12ºF. Construct an equivalent circuit for the solarium and determine the heat loss by radiation.
Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles ?1 and ?2 such that:
A.
B.
.C.
.D.
E.
During the Hadean Eon, life
A) could have existed and survived regardless of impacts B) may have existed but probably could not have survived for long periods due to sterilizing impacts C) probably survived and existed until the end of the Hadean eon after which it was destroyed D) could not have existed at all
Suppose an asteroid has a semi-major axis of 4 AU. How long does it take the asteroid to go around the Sun?
1.2 years 2.4 years 3.6 years 4.8 years