A child pushes a toy box across the floor in 5 seconds. If he did 30 J of work on the toy box, what amount of power was required
to complete this action?
6 watts
25 watts
150 watts
35 watts
2 answers:
My answer is 6 watts because 30J/5s is 6
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The answer is the third option
Answer:
SpongeBob SquarePants
Weight equals mass times gravitational acceleration=400N, so mass=400/9.8=41kg approx.
1) Equivalent resistance, 1/R = 1/15 + 1/40 + 1/60 = 8+3+2 /120 = 13/120
R = 120/13 = 9.23
2) Current, I = V/R = 115/9.23 = 12.45 A
Conductors have many free electrons
insulators have few free electrons
conductors are ideal for electrical wiring
