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Why is permissible operating temperature of n silicon higher than it is for n germanium?
What is the effect of increasing reverse voltage on the depletion region of a pn junction?
What is the cause of reverse saturation current?
Prove Lorentz conoriance of the first equation of the electromagnetic field.
divB=0, and curlE= -db/dt
Why are there no holes in copper?
6. A wooden boat is found buried beneath the ocean floor. Scientists believe that timbers making up the boat had 8 g of carbon-14 in them when alive. They now have 2.3 g of carbon-14. How old is the boat if the half-life of carbon-14 is 5715 years?
5. The isotope neptunium-238 has a half-life of 2.00 days. If 4.0 grams is the starting amount, how much will be left after 12 days?
3. If the half-life of an isotope is 3 years, what fraction of the isotope remains after 4 years? (put fraction in as decimal
2. In 40 days, the number of radioactive nuclei decreases to one-sixteenth the number present initially. What is the half-life (in days) of the material?
1. A substance has a half-life of 1.3 minutes. How many half-lives will the substance go through in 20.1 minutes?
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