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?
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For carbon dioxide, the van der Waals constants are: a = 0.364 J?m3/mol2, and b = 4.27 × 10-5 m3/mol
Assuming that the van der Waals equation holds at the critical point (where the p-V curve first becomes horizontal and has a point of inflection), what is the critical temperature of carbon dioxide? A) 513 K B) 592 K C) 304 K D) 1026 K E) 326 K
Two long parallel wires each carry a current of 5.0 A directed to the east. The two wires are separated by 8.0 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires?
a. 72 ?T b. 48 ?T c. 24 ?T d. 96 ?T e. 32 ?T
A block of mass m sits at rest on a rough inclined ramp that makes an angle ? with the horizontal. What must be true about the force F that the ramp exerts on the block perpendicular to the surface of the ramp?
A) F > mg B) F > mg cos ? C) F > mg sin ? D) F = mg cos ? E) F = mg sin ?
An isolated black hole in space would be difficult to detect because
a. there would be no light source nearby. b. it would not be rotating rapidly. c. it would be stationary. d. very little matter would be falling into it. e. there would be very few stars behind it whose light the black hole could block out.