Answer: I only have the answer for A, but still, the answer is 20.07.
- Explanation: Because the number ends in a 15, round to the nearest tenth which is 20. So now the number is 5420.
- To get the Watts (W) you have to take 5420 and divide it by the time in seconds. 4.5 minutes in seconds is 270, so 5420 divided by 270 equals 20.07.
- So 20.07 is the answer.
A She can run the same distance in a shorter amount of time.
Explanation:
Speed is a physical quantity that expresses the rate of change of distance with time:
Speed =
We can see that speed will increase if the distance covered increases with a decreasing amount of time.
Speed will decrease if the distance decreases with increasing time
Speed will increase if the distance covered stays the same with decreasing time
Speed will reduce if the distance covered stays the same with increasing time.
Learn more:
Speed brainly.com/question/10435836
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1 and 3 ???
not nuclear ... chemical (outside the nucleus)
energy is v v v often lost as heat.
Brain brain tissue nerve cell nervous tissue
The equation v²=u²+2as will help with solving this equation
v is what we are trying to find
u=0
a=4.9
s=200
v²=0²+2*4.9*200
v=√(2*4.9*200)
v=√1960
v=44.3 m/s (3 sf)