The change in distance is 30 because if you subtract both number you'll get 30
This is basically Michael Faraday's law and this is known as electromagnetic induction
That's all I know
Answer:
The object will likely start moving with a nonzero acceleration.
Power is the work performed divided by time in seconds. The work is the force times distance:

the time in seconds is 60*11+30=690s so the power is

So choice B
Answer:
Prevost's theory of exchanges stated that each body radiates to, and receives radiation from, other bodies. ... Prevost went on to comment that "The heat of several portions of space at the same temperature, and next to one another, is at the same time in the two species of equilibrium."
Explanation: