A 2.25-kg object is attached to a horizontal an ideal massless spring on a frictionless table
What should be the spring constant of this spring so that the maximum acceleration of the object will be g when it oscillates with amplitude of 4.50 cm?
490 N/m
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Earth doesn't experience a solar eclipse every month because
a. of unpredictable weather patterns. b. the Moon always keeps its same side toward the Earth. c. the Moon's orbit plane is not aligned with the Earth's orbit plane. d. its sometimes nighttime when the eclipse occurs. e. sometimes the Moon is too far away.
A solid sphere, a solid cylinder, and a hoop all have the same mass and radius. Each are sent down identical inclined planes starting from rest. Their kinetic energies at the bottom of the incline are Ksphere,Kcylinder, and Khoop. Which of the following is true?
A. Ksphere>Kcylinder B. Khoop>Ksphere C. Khoop>Kcylinder D. Kcylinder>Khoop E. No answer above is correct.
What is the unit of resistance?
a. The volt. b. The coulomb. c. The ohm. d. The ampere. e. The joule.
Nuclear Binding Energy: The stability of 
Cl with respect to alpha, beta-plus and beta-minus decay is to be determined. The following atomic masses are known:
A. not subject to alpha, beta-plus or beta-minus decay. B. subject to alpha decay only. C. subject to beta-plus decay only. D. subject to beta-minus decay only. E. subject to beta-plus or beta-minus decay, but not to alpha decay.