Answer:
549 gallons
Explanation:
1 gallon of radioactive material was added to unknown volume of gasoline which we will represent as V in gallons.
Initially the 1 gallon gives a 5500 counts per minutes (cpm)
After adding to an underground gasoline tank, the total volume becomes
(V + 1) gallons
1 gallon was withdrawn from the underground and gave 10 cpm
using simple proportion and assuming the gasoline has mixed together
1 gallon gave 10 cpm
10 (V + 1) gallons should give 5500cpm
10 (V+1) = 5500cpm
divide both side by 10
V+1 = 5500 /10 = 550
V = 550 -1 = 549 gallons
Answer:
Explanation:
Remark
The only thing that might trip you up is what to do with the angle. The vertical component of the 15 degrees does no work against anything. So the 15 degrees limits the horizontal force.
The formula is
Work = F * d * cos(15)
The givens are
F = 2000 N
d = 30 m
Cos(15) = 0.9659
Solution
Work = 2000 * 30 * cos(15)
Work = 57,955
Rounded to two places would be 5.8 * 10^4
C
Explanation:
Natural length of a spring is . The spring is streched by . The resultant energy of the spring is .
The potential energy of an ideal spring with spring constant and elongation is given by .
So, in the current problem, the natural length of the spring is not required to find the spring constant .
∴ The spring constant of the spring =
Answer:
Scientific notation is the way that scientists easily handle very large numbers or very small numbers. For example, instead of writing 0.0000000056, we write 5.6 x 10-9. So, how does this work? We can think of 5.6 x 10-9 as the product of two numbers: 5.6 (the digit term) and 10-9 (the exponential term).
Explanation:
Explanation:
hope you understood fella