I just googled refraction vs reflection. Hope this helps! :)
Answer:
A force is a push or a pull and it affects our daily lives because without force,people would not be able to open and close stuff or lift up our arms or legs .....or anything, for that matter.
Explanation:
brainly
Microwaves and light waves ... as well as radio, X-rays,
ultraviolet rays, gamma rays, etc. ... are waves of
electromagnetic radiation. The difference is in their
frequency/wavelength.
The amount of a radioactive element over time can be written as:

So, considering that we know the time of its half life, we know how long it takes to get to half the original amount. This is (usint the amount of days in microseconds):


Thus, lambda=3.82*10^(-11)/microseconds
Answer: 71.72 days
Explanation:
This problem can be solved using the <u>Radioactive Half Life Formula: </u>
(1)
Where:
is the final amount of Iodine-131
is the initial amount of Iodine-131
is the time elapsed
is the half life of Iodine-131
Knowing this, let's substitute the values and find
from (1):
(2)
(3)
Applying natural logarithm in both sides:
(4)
(5)
Finding
: