<span>The moment of inertia for a cylinder of mass 'm' and radius 'r' is I = (m*r^2)/2. The average circumference of an adult head is stated to be 55 cm, yielding a radius of approximately 9 cm. Plugging this figure, along with the stated mass, into the listed equation, we have I = (62.5*0.09^2)/2 = 0.25 kg m^2.</span>
<h2>
Cost savings in using the fluorescent bulb is 3.81 cents</h2>
Explanation:
A 100 watt incandescent light bulb is operated for 7 hours.
Energy used by 100 watt incandescent light bulb = Power x Time
Energy used by 100 watt incandescent light bulb = 100 x 7 = 700 Wh
Energy used by 100 watt incandescent light bulb = 0.7 kWh
A 32 watt fluorescent light bulb is operated for 7 hours.
Energy used by 32 watt fluorescent light bulb = Power x Time
Energy used by 32 watt fluorescent light bulb = 32 x 7 = 224 Wh
Energy used by 32 watt fluorescent light bulb = 0.224 kWh
Cost of electricity per kWh = 8 cents
Cost of electricity by 100 watt incandescent light bulb = 0.7 x 8 = 5.6 cents
Cost of electricity by 32 watt fluorescent light bulb = 0.224 x 8 = 1.792 cents
Difference in costs = 5.6 - 1.792 = 3.808 cents
Cost savings in using the fluorescent bulb is 3.81 cents
Answer:
Explanation:
From the question we are told that
Generally the equation for velocity is mathematically given as
Generally the equation for Centripetal acceleration is mathematically given as
Answer:
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Answer:
efficiancy=40 percent
Explanation:
efficiency=energy output/energy input×100
efficiancy=8J/20J×100
efficiancy=0.4×100
efficiancy=40 percent
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