Explanation:
Earth or any planet are actually born from huge clouds of gas and dust. Their stellar mass are fairly distributed at a radius from the axis of rotation. Gravitational force cause the cloud to come together. Now the whole gathered in smaller area. Now, individual particles come close to the roational axis. Thus, decreasing the moment of inertia of the planet.
As
I=mr^2
reducing r reduces I. However, the angular moment of the system remains always conserved. So, to conserve the angular momentum the angular velocity of the planet increases and so did the otational kinetic energy
The correct answer is B. False I believe because the element hydrogen is made from atoms containing just one protons and one electrons. So The correct is B. False.
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One very handy electrical formula is
Power dissipated by a resistance = (Voltage)²/(resistance) .
24 kilowatts = (240 v)² / Resistance
Multiply each side by (Resistance):
(Resistance) x (24 kilowatts) = (240 v)²
Divide each side by (24 kilowatts):
Resistance = (240 v)² / (24,000 watts)
Resistance = (57,600 / 24,000) (volt² / volt · Amp)
Resistance = 2.4 (volt/Amp)
Resistance = 2.4 Ohms
Answer:
The store energy is 2113109.72 J.
Explanation:
Given that,
Radius = 0.11 m
Mass = 6.5 kg
Spins = 70000 rpm
Suppose we need to find how much kinetic energy is stored by the flywheel when it is rotating at its maximum rate
We need to calculate the moment of inertia
Using formula of moment of inertia
Put the value into the formula
We need to calculate the rotational kinetic energy
Using formula of rotational kinetic energy
Put the value into the formula
Hence, The store energy is 2113109.72 J.