College Physics 12th Edition solutions

College Physics 12
Problem 1P Why is it useful to create an assembly of very slow-moving cold atoms A. The atoms can be more easily observed at slow speeds. B. Lowering the temperature this way permits isotopes that normally decay in very short times to persist long enough to be studied. C. At low speeds the quantu

College Physics 12
Problem 2P The momentum of a photon is given by p = h/??. Suppose an atom emits a photon. Which of the following photons will give the atom the biggest kickthe highest recoil speed? A. An infrared photon B. A red-light photon C. A blue-light photon D. An ultraviolet photon

College Physics 12
Problem 3P When an atom moves upstream against the photons in a laser beam, the energy of the photons appears to be _______ if the atom were at rest. A. Greater than B. Less than C. The same as

College Physics 12
Problem 4P A gas of cold atoms strongly absorbs light of a specific wavelength. Warming the gas causes the absorption to decrease. Which of the following is the best explanation for this reduction? A. Warming the gas changes the atomic energy levels. B. Warming the gas causes the atoms to move at

College Physics 12
Problem 5P A gas of cold atoms starts at a temperature of 100 nK. The average speed of the atoms is then reduced by half. What is the new temperature? A. 71 nK B. 50 nK C. 37 nK D. 25 nK

College Physics 12
Problem 6P Rubidium is often used for the type of experiments noted in the passage. At a speed of 1.0 mm/s, what is the approximate de Broglie wavelength of an atom of A. 5 nm B. 50 nm C. 500 nm D. 5000 nm

College Physics 12
Problem 7P A gas of rubidium atoms and a gas of sodium atoms have been cooled to the same very low temperature. What can we say about the de Broglie wavelengths of typical atoms in the two gases? A. The sodium atoms have the longer wavelength. B. The wavelengths are the same. C. The rubidium at

College Physics 12
Problem 8P Splitting the Atom Splitting an atom in the process of nuclear fission releases a great deal of energy. If all the atoms in 1 kg of of coal. What is the source of this energy? Surprisingly, the energy from this nuclear disintegration ultimately comes from the electric potential of th

College Physics 12
Problem 9P Splitting the Atom Splitting an atom in the process of nuclear fission releases a great deal of energy. If all the atoms in 1 kg of undergo nuclear fission, will be released, equal to the energy from burning of coal. What is the source of this energy? Surprisingly, the energy fr

College Physics 12
Problem 11P Splitting the Atom Splitting an atom in the process of nuclear fission releases a great deal of energy. If all the atoms in 1 kg of undergo nuclear fission, will be released, equal to the energy from burning of coal. What is the source of this energy? Surprisingly, the energy f

College Physics 12
Problem 10P Splitting the Atom Splitting an atom in the process of nuclear fission releases a great deal of energy. If all the atoms in 1 kg of undergo nuclear fission, will be released, equal to the energy from burning of coal. What is the source of this energy? Surprisingly, the energy f

College Physics 12
Problem 12P Splitting the Atom Splitting an atom in the process of nuclear fission releases a great deal of energy. If all the atoms in 1 kg of undergo nuclear fission, will be released, equal to the energy from burning of coal. What is the source of this energy? Surprisingly, the energy f

College Physics 12
Problem 13P Splitting the Atom Splitting an atom in the process of nuclear fission releases a great deal of energy. If all the atoms in 1 kg of undergo nuclear fission, will be released, equal to the energy from burning of coal. What is the source of this energy? Surprisingly, the energy f

College Physics 12
Problem 14AIP The glow-in-the-dark dials on some watches and some keychain lights shine with energy provided by the decay of radioactive tritium, . Tritium is a radioactive isotope of hydrogen with a half-life of 12 years. Each decay emits an electron with an energy of 19 keV. A typical new wat

College Physics 12
Problem 15AIP An x-ray tube is powered by a high-voltage supply that delivers 700 W to the tube. The tube converts 1% of this power into x rays of wavelength 0.030 nm. a. Approximately how many x-ray photons are emitted per second? b. If a 75 kg technician is accidentally exposed to the full powe

College Physics 12
Problem 16AIP Many speculative plans for spaceships capable of interstellar travel have been developed over the years. Nearly all are powered by the fusion of light nuclei, one of a very few power sources capable of providing the incredibly large energies required. A typical design for a fusion-p

College Physics 12
Problem 17AIP A muon is a lepton that is a higher-mass (rest mass ) sibling to the electron. Muons are produced in the upper atmosphere when incoming cosmic rays collide with the nuclei of gas molecules. As the muons travel toward the surface of the earth, they lose energy. A muon that travels

College Physics 12
Problem 18AIP A muon is a lepton that is a higher-mass (rest mass A muon is a lepton that is a higher-mass (rest mass ) sibling to the electron. Muons are produced in the upper atmosphere when incoming cosmic rays collide with the nuclei of gas molecules. As the muons travel toward the surface