Rotational Kinetic Energy: A solid sphere and a solid cylinder, both uniform and of the same mass and radius, roll without slipping at the same forward speed. It is correct to say that the total kinetic energy of the solid sphere is
A. more than the total kinetic energy of the cylinder.
B. less than the total kinetic energy of the cylinder.
C. equal to the total kinetic energy of the cylinder.
Answer: B
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Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. Sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. Which one, if either is correct?
a. Beryl, because low thermal conductivity results in low heat transfer. b. Beryl, because low thermal conductivity results in high heat transfer. c. Sapphire, because low thermal conductivity results in low heat transfer. d. Sapphire, because low thermal conductivity results in high heat transfer. e. Neither, because low heat transfer is desirable both in summer and in winter.
The Hawaiian Islands and the Emperor seamount chain were formed when the Pacific plate rode over a(n) ______________
Fill in the blank(s) with correct word
If H equals 50 km/s/Mpc, then a galaxy with a radial velocity of 50,000 km/s will have a distance of about 1 Mpc
a. True b. False Indicate whether the statement is true or false
If 1.0 m3 of concrete weighs 5 × 104 N, what is the height of the tallest cylindrical concrete pillar that will not collapse under its own weight? (The compression strength of concrete is 1.7 × 107 N/m2.)
What will be an ideal response?