Answer:
r = 255.68 m
Explanation:
When a body moves in a circular path, an acceleration, due to constant change in its direction, is developed, known as centripetal acceleration. The centripetal acceleration acts towards the center of the circular path. The formula to calculate the centripetal acceleration is given as follows:
ac = v²/r
where,
ac = centripetal acceleration = 22 m/s²
v = tangential speed = 75 m/s
r = radius of curve = ?
Therefore,
22 m/s² = (75 m/s)²/r
r = (75 m/s)²/(22 m/s²)
<u>r = 255.68 m</u>
-- Conserve. Don't use more than we need. There isn't any more of it.
-- Conserve. Don't pollute what we have. There isn't any more of it.
Of course, what we REALLY need to do is <u><em>convince</em></u> great numbers of people to go along with these suggestions. Otherwise it won't work.
Answer:
For 1 week total cost will be equal to 0.2912
Explanation:
We have given power P = 40 watt
Light is on from 6 pm to 7 am
So total time = 13 hours
We know that energy is given by
So energy will be 
We have given cost per KWh is 0.08
So total cost per day will be = 0.08 ×0.520 = 0.0416
For 1 week that is for 7 day total cost will be = 7×0.0416 = 0.2912
