Question

1. Which has the greater amount of internal energy—an iceberg or a cup of hot coffee? Defend your answer

2. If you toss a stone in still water, concentric circles are formed. What form will waves have if a stone is tossed into smoothly flowing water?

3.What is the ultimate source of energy in coal, oil, and wood? Why do we call energy from wood renewable but energy from coal and oil nonrenewable?

Answer 1

1) the iceberg will have larger amount of internal energy because of it's greater mass than the small cup of coffee.

2) there will still be formation of concentric circle which will be formed relative to the water, after a period of time , the observer will start seeing elliptical patterns due to doppler effect

3) The source of energy in coal , oil and wood is chemical potential energy . energy from wood is renewable because it can be replenished naturally over a short period of time whereas coal and oil and available in limited quantity and it takes lot to time to recover them and hence they are called non renewable