Answer: 477W
Explanation:
Given the following :
Mass (m) = 7.3kg
Initial Velocity (u) = 0
Final velocity (v) = 14m/s
time (t) = 1.5s
Power = workdone (W) / time (t)
The workdone can be calculated as the change in kinetic energy (KE) :
Recall ;
KE = 0.5mv^2
Therefore, change in KE is given by:
0.5mv^2 - 0.5mu^2
Change in KE = 0.5(7.3)(14^2) - 0.5(7.3)(0^2)
Change in KE = 715.4J
Therefore ;
Average power = Workdone / time
Workdone = change in KE = 715.4N
Average power = 715.4 / 1.5
Average power = 476.93333 W
= 477W
Answer:
Which one are we supposed to do
Explanation:
A particular atom<span> will have the same number of protons and electrons and most</span>atoms<span> have at least as many neutrons as protons. An </span>element<span> is a substance that is made entirely from one type of </span>atom<span>. For example, the </span>element<span> hydrogen is made from </span>atoms<span> containing just one proton and one electron.
Hope this helps</span>
I'm pretty sure the answer to your question is water because water particles are very close together but don't stay the same shape
Answer:
Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. ... Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.
Explanation:
