Answer:
Energy is force times distance. For your problem, no matter how long you push, the wall still goes nowhere, so there is no obvious energy transfer. so in conclusion, you actually didn't do anything :(
Explanation:
propagated disturbance is a variation
Answer:
The total amount of heat needed will be
.
Explanation:
We will divide the calculation in two: First, the heat needed to melt the ice, and then the heat needed to warm the resulting liquid from 0°C to 37°C.



<em>i) </em>The fusion heat will be:

<em>ii)</em> The heat needed to warm the water from
to
will be:

So, the total amount needed will be the sum of these two results:
.