A uniform solid sphere rolls without slipping along a horizontal surface. What fraction of its total kinetic energy is in the form of rotational kinetic energy about the CM?
What will be an ideal response?
2/7
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Which theory best describes today's current thinking about the birth of a solar system?
a. Big Bang theory b. Solar Nebular theory c. Condensation theory d. Theory of Relativity e. Passing star theory
Potential Energy: A very small 4.8-g particle carrying a charge of +9.9 ?C is fired with an initial speed of 8.0 m/s directly toward a second small 7.8-g particle carrying a charge of + 5.2 ?C. The second particle is held fixed throughout this process. If these particles are initially very far apart, what is the closest they get to each other? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
In comparing two unequal forces on a rigid body, is it possible to have the larger force produce less torque than the smaller force?
A. yes B. no C. insufficient information
About what percentage of a star's total lifetime is spent on the main sequence?
A) 10% B) 20% C) 50% D) 90% E) 100%