Which of the following materials is a dielectric?
(a) Copper
(b) n-type silicon
(c) Diamond
(d) Lithium-doped polyacetylene
(c) Diamond
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Kinetic energy is conserved in
a. an inelastic collision. b. an elastic collision. c. any collision where two objects rebound off each other. d. none of the above.
We can be sure the particles in the rings of Neptune are very small because
a. the rings are faint in forward-scattered light. b. the rings are bright in forward-scattered light. c. only small particles are produced in comet impacts with larger moons. d. the magnetic field of Neptune would quickly force large particles out of the rings. e. the larger particles would be quickly destroyed by impacts with the shepherd satellites.
Calorimetry: Two experimental runs are performed to determine the calorimetric properties of an alcohol which has a melting point of -10°C. In the first run, a 200-g cube of frozen alcohol, at the melting point, is added to 300 g of water at 20°C in a styrofoam container. When thermal equilibrium is reached, the alcohol-water solution is at a temperature of 5°C. In the second run, an identical cube of alcohol is added to 500 g of water at 20°C and the temperature at thermal equilibrium is 10°C. The specific heat capacity of water is 4190 J/kg ? K. Assume no heat is exchanged with the styrofoam container and the surroundings. What is the specific heat capacity of the alcohol?
A. 1700 J/kg ? K B. 1900 J/kg ? K C. 2100 J/kg ? K D. 2300 J/kg ? K E. 2500 J/kg ? K
When sulfur-35 (Z = 16) decays to chlorine-35 (Z = 17), a(n) __________ is emitted
Fill in the blank(s) with correct word