In emission,
a) an electron moves from an excited state to a lower energy state, and energy is released.
b) an electron moves from an excited state to a lower energy state, and energy is absorbed.
c) an electron moves from a lower energy state to an excited state, and energy is released.
d) an electron moves from a lower energy state to an excited state, and energy is absorbed.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

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