ANSWER:
300 J
STEP-BY-STEP EXPLANATION:
To know the work required, we must calculate the work in both cases, the difference would be the amount of work necessary for the speed to increase. The work done is the same as the amount of energy increase. The formula for kinetic energy is:
We calculate in each case:
We calculate the difference between the two to find out the work required:
The work required is 300 J
Magnitude: Magnitude generally refers to the quantity or distance.
Attraction: A force that makes things move together and stay together.
Repulsive: The feeling of being repelled, as by the thought or presence of something; distaste, repugnance, or aversion.
Current: Current is the rate of flow of electric charge. A potential difference (voltage) across an electrical component is needed to make a current flow through it.
I hope that helps :]
Answer:
c) 22,920 years
Explanation:
The half-life of C-14 is 5730 so in 5730 years , amount of C-14 is reduced to half.
In 5730 x 2 years , the amount of C-14 is reduced to 1/4 .
In 5730 x 3 years , the amount of C-14 is reduced to 1/8 .
In 5730 x 4 years , the amount of C-14 is reduced to 1/16 .
In 22920 years , the amount of C-14 is reduced to 1/16 .
So the answer is 22920 years.
Answer:
1.35 miles
Explanation:
Since the slope is 14% grade = -14/100. This is a negative slope.
The distance of 1000 ft descended is a vertical descent, so assuming our initial position is 0, and Δx is the change in horizontal distance.
tanθ = -14/100 = (0 - 1000)/Δx = - 1000)/Δx
-14/100 = - 1000)/Δx
Δx = -1000 × -100/14= 7142.86 ft
5280 ft = 1 mile
7142.86 ft = 7142.86/5280 miles = 1.353 miles ≅ 1.35 miles