A torsional pendulum consists of a solid disk (mass = 2.0 kg, radius = 1.0 m) suspended by a wire attached to a rigid support. The body oscillates about the support wire. If the torsion constant is 16 N?m/rad. What is the angular frequency (in rad/s)?
A. 2
B. 4
C. 6
D. 8
E. 7
Answer: B
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Rotational Dynamics: A small 355-g box hangs from one end of a thin light string that goes over a frictionless pulley having a moment of inertia of 0.0125 kg ? m2 and a radius of 15 cm. A second small package, this one of mass 680 g, hangs from the other end of the string. When the packages are released, the larger one accelerates downward, the lighter one accelerates upward, and the pulley turns without the string slipping.(a) What is the tension in the string on the side of the 355-g package?(b) At what rate do the packages change their speeds?
What will be an ideal response?
A depth change of 10 metres/33 feet causes a pressure change of.
a. 1 bar/ata b. 2 bar/ata c. 3 bar/ata d. 4 bar/ata
Ideal monatomic gas A is composed of molecules with mass m while ideal monatomic gas B is composed of molecules with mass 4m. The average translational kinetic energies are the same if the ratio of the temperatures TA/TB is:
A. 1/4 B. 1/2 C. 1 D. 2 E. 4
If electric field lines flow out of a positive charge, as shown in this figure, where do these same lines terminate?
a. The lines continue forever. b. They terminate on negative charge, not shown in the figure. c. The lines are fictitious and need not terminate anywhere. d. The lines simply become weaker with distance until they disappear. e. The field lines circle around and return to the same charge they started from.