A man rides a bicycle that is connected to an electrical generator. If he rides as hard as he can, his body can produce a mechanical power of 500 W, but the generator is only 40% efficient at converting mechanical energy into electrical energy. How many 100 W incandescent light bulbs can he power

the man can power 2 incandescent light bulbs

Explanation:

Given that;

power produced by the body while riding = 500 W

Efficiency of generator = 40% = 0.4

First we need to convert the mechanical energy to electric energy;

which efficiency of generator multiply by power input, so

⇒ 0.4 × 500 = 200 W

Now, if 1 incandescent light bulbs is 100 W

x incandescent light bulbs bulbs is 200 W

100x W= 200 W

x = 200 W / 100 W

x = 2

Therefore, the man can power 2 incandescent light bulbs

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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