The electrical resistivity of copper at 123 K is 0.50×10-8 ?·m and at 173 K it is 0.88×10-8 ?·m. Evaluate the B term in Equation 16.17.
What will be an ideal response?
there are two unknowns ?s and B. Therefore, it is necessary to have two equations to solve for any unknowns.
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Surface tension is a direct result of
A) viscosity. B) Archimedes' principle. C) adhesive forces between molecules in a liquid or solid. D) cohesive forces between molecules in a liquid.
A hole is punched in a full milk carton, 10 cm below the top. What is the initial velocity of outflow?
a. 1.4 m/s b. 2.0 m/s c. 2.8 m/s d. 3.9 m/s e. 4.2 m/s
In the proton-proton chain
a. no neutrinos are produced. b. energy is released because a helium nucleus has a greater mass than a hydrogen nucleus. c. no photons are produced. d. carbon serves as a catalyst for the nuclear reaction. e. energy is produced in the form of gamma rays and the velocity of the created nuclei.
Star clusters are important to the study the stellar evolution because stars in a given cluster have the same
a. temperature. b. mass. c. age. d. luminosity.