Answer:
If a runner exerts 350 J of work to generate 175 W of power, it took the runner 2 seconds to do the work.
Explanation:
Power is defined as the speed with which a job is done. In other words, power is a given amount of work done in a given unit of time. That is, it is the amount of work per unit of time that some object or system produces.
Its expression is:
where:
- P: Power developed by the force doing the work. Its unit of measure in the International System is the Watt (W)
- W: Work. Its unit of measure in the International System is the Joule (J)
- t: Time during which the work is carried out. Its unit of measurement in the International System is the second (s).
In this case:
Replacing:
and solving you get:
t= 2 s
<u><em>
If a runner exerts 350 J of work to generate 175 W of power, it took the runner 2 seconds to do the work.</em></u>
Because if there's no force on the object, then it just moves in a straight line.
Answer: negative
Explanation:
those are electrons. electrons = - charge
nice ish diagram
m 55g
scale readings ... 69, 65 ... diff 4 units
4 x area of cross section = vol displ = vol hammer
dens = 4/55xarea ... units
silicone rubber is used to make a cast of a tool mark.