Kinetic energy is proportional to the square of the speed. So when anything or anybody speeds up, its kinetic energy increases.
A conductor contains electrons that are bound so weakly to their atoms
that they can be ripped away with a small voltage, and sent scurrying in
the direction of the higher potential.
<u>Answer:</u>
<em>The length of the swimming course is 47.16 meters.</em>
<u>Explanation:</u>
It is given that the right triangle overlaps the lake and hypotenuse L runs through the length of the lake. Thus length of the lake will be the length of this hypotenuse.
The instructors have conducted measurements of the right triangle and has found the legs to be 25 and 40 meters. The sum of squares of base and height of a right triangle gives the value of its hypotenuse according to Pythagoras theorem.
Thus 
b - base
h - height.
C. Farmers and gardeners should use other methods..........
Power = (work done) / (time to do the work)
Work done = (force) / (distance moved in the direction of the force)
The work for the first mass is (5 kg) x (g) x (2 m) = 10g Joules.
The work for the 2nd mass is (10 kg) x (g) x (1 m) = 10g Joules.
as long as Jenna lifts both masses on the same planet, the amount of work is going to be the same in both cases. So in order to have the same power output, she would have to do both jobs in the same amount of time. If she did the first one in 3 seconds, then the second one also requires 3 seconds.
