Answer:
I'm not sure, its either 1 or 2
Explanation:
Water melts ice because it is at a higher temperature than the ice, so heat energy is transferred from the water to the ice. Since the scientific principle at work here is the idea of heat transfer, it is not necessary that water be used to melt ice.
Answer:
both are correct .... ....
A continually rotating magnetic field would continuously induce current, the induced current would show alternating direction
First of all, the question is worded somewhat ambiguously because mass does not necessarily imply that there is a force (i.e. an object could be stationary in a system with no gravity and not have a force, or something of the like). Moreover, simply because an object is twice the mass does not mean the force will change.
However, we know from Newton's second law that F = ma. Therefore, force will increase or decrease proportionally with mass. This means if an object maintains a contestant acceleration and its mass doubles, the force that it provides will also double.