As far as I remember the nuclear power is derived from a nuclear <span>A)fusion </span>chain reaction. I think it's correct.
Answer:
<em>The centripetal acceleration would increase by a factor of 4</em>
<em>Correct choice: B.</em>
Explanation:
<u>Circular Motion</u>
The circular motion is described when an object rotates about a fixed point called center. The distance from the object to the center is the radius. There are other magnitudes in the circular motion like the angular speed, tangent speed, and centripetal acceleration. The formulas are:
If the speed is doubled and the radius is the same, then
The centripetal acceleration would increase by a factor of 4
Correct choice: B.
Answer:
(a) 2450 J
(b) 0.0567 W
(c) 6347755 trees
Explanation:
mass of water, m = 50 kg
distance, h = 5 m
time, t = 12 hour = 12 x 3600 second = 43200 s
(a) Amount of work done, W = m x g x h = 50 x 9.8 x 5 = 2450 J
(b) Power is defined as teh rate of doing work .
Power = work / time = 2450 / 43200 = 0.0567 Watt
(c) Electrical power = 30 kWh
Time = 12 hour
Power = energy x time 30 x 12 = 360 kW = 360000 W
power by one tree = 0.0567 watt
Nuber of trees required = 360000 / 0.0567 = 6347755
Thus, the number of trees required are 6347755.