Which option below correctly compares the average annual dose of background radiation to the dose liked to an increased cancer r
isk?
A. The average annual dose of background radiation is 250 times larger than the dose linked to increased cancer risk.
B. The average annual dose of background radiation is 250 times smaller than the dose linked to increased cancer risk.
C. The average annual dose of background radiation is 100,000 times smaller than the dose linked to increased cancer risk.
D. The average annual dose of background radiation is 100,000 times larger than the dose linked to increased cancer risk.
A. The average annual dose of background radiation is 250 times larger than the dose linked to increased cancer risk.
B. The average annual dose of background radiation is 250 times smaller than the dose linked to increased cancer risk.
C. The average annual dose of background radiation is 100,000 times smaller than the dose linked to increased cancer risk.
D. The average annual dose of background radiation is 100,000 times larger than the dose linked to increased cancer risk.
1 answer:
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Answer:
38.47 m
Explanation:
To find the height of the building, we will use the following equation
Where yf is the final height, yi is the initial height, viy is the initial vertical velocity, t is the time, and a is the acceleration due to gravity.
If the brick is in flight for 3.1 s, we can say that when t = 3.1s, yf = 0 m. So, replacing
viy = (16 m/s)sin(10) = 2.78 m/s
a = -9.8 m/s²
we get
Solving for yi
Therefore, the height of the building is 38.48 m