What happens in electron capture?
a. The nucleus emits an electron, a neutron becomes a proton, and the atomic number goes up.
b. The nucleus absorbs an electron, a proton becomes a neutron, and the atomic number goes down.
c. The nucleus emits a positron, a neutron becomes a proton, and the atomic number goes down.
d. The nucleus emits an electron, a neutron becomes a proton, and the atomic number goes down.
e. The nucleus absorbs an electron, a proton becomes a neutron, and the atomic number goes up.
b
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A refrigerator uses 40.0 J of work to extract 90.0 J from a heat reservoir at 
What is the coefficient of performance for the refrigerator?
A. 1.60 B. 2.05 C. 2.25 D. 2.85
Which of these bodies has the lowest density?
A) Saturn B) Jupiter C) a comet D) an asteroid E) a Kuiper Belt object
What is meant by neutrino oscillations?
a. oscillating movement of neutrinos b. one neutrino type (e.g., muon neutrinos) changing into another (e.g., tau neutrinos) c. random changes in mass of neutrinos d. none of the above
A silicon monoxide thin film (n = 1.45) of thickness 77.6 nm is applied to a camera lens made of glass (n = 1.55). This will result in a destructive interference for reflected light of what wavelength?
a. 720 nm c. 450 nm b. 558 nm d. 522 nm