Apenny rides on top of a piston as it undergoes vertical simple harmonic motion with an amplitude of 4.0cm. if the frequency is low, the penny rides up and down without difficulty. if the frequency is steadily increased, there comes a point at which the penny leaves the surface.

1) at what point in the cycle does the penny first lose contact with the piston? (answer choices: )
a. midpoint moving up
b. midpoint losing down
c. highest point
d. lowest point

2) what is the maximum frequency for which the penny just barely remains in place for the full cycle?

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole