Answer:
the answer to this question is option A mark me as brainliest
mark me as brainliest
Answer:
2.34 gms left
Explanation:
3 weeks = 21 days = 7 half lives
300 * (1/2)^7 = 2.34 gms
X rays have a lower frequency than microwaves would be the scientific statement.
Answer:
Two advantages are: Its cheap and it is a renewable energy source. Two disadvantages are it's not windy everyday and it will take up a lot of space for windmills.
Explanation:
Frequency=speed over wavelength
so you need to know the value of speed in light inordet to figure out the frequency.
