The threshold energy to initiate a certain nuclear reaction is 3.16 MeV and the Q for the reaction is -2.37 MeV. The stationary target is how many times as massive as the incident particle?
What will be an ideal response?
3.0 times as massive
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________ occur about 130 km above Earth's surface near the polar regions when energy in the solar wind guided by Earth's magnetic field excites gases in the upper atmosphere
a. Coronas b. Flares c. Auroras d. Coronal holes e. Nuclear fission
The half-life of uranium-232 is 70 years. The time for 3/4 of a sample of uranium-232 to decay is 105 years
a. True b. False Indicate whether the statement is true or false
The figures below represent interference fringes. The distances from the screen to the slits is the same for each figure, and the planes of the screen and the slits are parallel. In each figure the spacing d between the slits is the same. Which figure(s) represent(s) slits illuminated with light of the greatest wavelength ?? The white spaces represent the interference maxima
a.
I.
b.
II.
c.
III.
d.
IV.
e.
V.
What can disrupt the evolutionary sequence of a star?
What will be an ideal response?