The spring force is larger
A. The more the spring is compressed
B. The more the length is changed
C. The more the spring is stretched
D. None of these
Answer: B. The more the length is changed
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Flux: A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are at an angle of 30°.
A. 0 T ? m2 B. 3.1 × 10-3 T ? m2 C. 5.5 × 10-3 T ? m2 D. 6.3 × 10-3 T ? m2
If a spaceship travels near the speed of light away from the Earth, an observer on Earth would see the length of the spaceship ________
Fill in the blank(s) with correct word
Calculate the energy released in the following fusion reaction where reactants are 6Li and a neutron; products are 4He and 3H. (atomic masses: 6Li, 6.015 12; neutron, 1.008 67; 4He, 4.002 60; 3H, 3.016 031; also 1 u = 931.5 MeV/c2)
a. 2.95 MeV b. 4.81 MeV c. 8.63 MeV d. 17.2 MeV
A turntable has a moment of inertia of 3.0 × 10^-2 kg•m2 and spins freely on a frictionless bearing at 25 rev/min. A 0.60-kg ball of putty is dropped vertically on the turntable and sticks at a point 0.10 m from the center. By what factor does the kinetic energy of the system change after the putty is dropped onto the turntable?
a. 0.91 c. 0.83 b. 1.0 d. 1.5