Answer:
375J of wasted energy
Explanation:
Efficiency=work output/work input×100%
50=w.o/750×100
750×50=100w.o
w.o=750×50/100
w.o=75×5
w.o=375J
Wasted energy=750J-375J
=375J
Aliter
If the machine is 50% efficient then it is also 50% inefficient
50%×750J=375J
Answer:
74.4 kilowatts or 99.8 horsepower
Explanation:
The explanation is in the attachment.
Answer:
2nd option
Explanation:
Static electricity the charges are at rest and they are accumulating on the surface of the insulator.
Current electricity the electrons are moving inside the conductor.
Marble. This is because granite is of a different chemistry that is not nearly as vulnerable to acidic rain as marble.