In an experiment to measure the thermal conductivity of a certain material, a slab of material 10.0 mm thick separates a steam chamber from a block of ice with a square cross-section with dimensions 8.00 cm × 8.00 cm
After 5.00 min of running the experiment, 64.0 g of ice have melted. What is the thermal conductivity of this material? The latent heat of fusion of water is 33.5 × 104 J/kg, the latent heat of vaporization of water is 2.256 × 106 J/kg, and both the ice and water are under 1.00 atm of pressure.
A) 0.130 W/m ? K
B) 0.250 W/m ? K
C) 0.440 W/m ? K
D) 0.620 W/m ? K
E) 1.12 W/m ? K
E
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A) almost in its entirety by Max Planck. B) almost in its entirety by Albert Einstein. C) almost in its entirety by Erwin Schroedinger. D) in its entirety by Planck, Schroedinger, and Einstein. E) by Planck, Schroedinger, Einstein, and many other scientists.
It is possible for a mixture of hot water (90 °C) and ice to have a final equilibrium temperature of 0 °C
What will be an ideal response?
Carbonaceous chondrites are meteorites that have
a. never been melted since formation from solid particles in the solar nebula. b. totally melted after formation. c. been made from hydrogen and helium. d. never entered Earth's atmosphere. e. entered Earth's atmosphere but will be destroyed before reaching the ground.
The binding energy of a nucleus is equal to
a. the energy needed to remove one of the nucleons. b. the average energy with which any nucleon is bound in the nucleus. c. the energy needed to separate all the nucleons from each other. d. the mass of the nucleus times c2.