1. in the nuclear reaction e- + e+ (assume that particles are not moving to begi
ID: 3901764 • Letter: 1
Question
1. in the nuclear reaction e- + e+ (assume that particles are not moving to begin with), what is the net energy released in keV?
a. 100 keV b. 511 keV c.1000000 keV d. 1022 keV
2. the mass of a proton is 1.676 x 10^-27 kg and the mass of a neutron is 1.6749 x 10^-27 kg. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be:
a. equal to (1.6726 x 1.6749) x 10^-27 kg b. less than (1.6726 x 1.6749) x 10^-27 kg
c. any of these; it depends on the energy released during the capture d.greater than (1.6726 x 1.6749) x 10^-27 kg
3. an electron is accelerated from rest to a speed of 7.89 x 10^6 m/s, what potential difference did it cross?
a. 512 V b. 177 V c. 300 V d. 295 V
Explanation / Answer
1. 511 KeV
2. a. equal to (1.6726 x 1.6749) x 10^-27 kg
3. 177 V
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