i searched this in googl.e, and there was one website, so i clicked it, and umm it was very disgusting ,,,
There's really no "why", because it's not difficult at all.
Simply multiply the number of miles by 1,760, and bada boom,
there you have the same distance described in yards.
If the car is on the moon, its mass is about 817 kg.
If it's on the Earth, its mass is about 135 kg.
Answer:
The magnitude of charge is 
with a positive charge.
Explanation:
Given that,
The potential due to a point charge, 
Distance, d = 15.7 m
The potential due to a point charge is given by :
q is charge
k is electrostatic constant
Here, the potential is positive, then the magnitude of charge is with a positive charge.
efficiency=work output/work input×100
since it exhausts(use up)3000j of heat that's the work input and the 1500j is the work input
efficiency=1500/3000×100
=50%
