Homework help please. 10th grade science?

Question

1. The combustion of a fuel provides 15 000 J of thermal energy to heat water. If the temperature of 0.50 kg of water is raised by 4.0°C, calculate the efficiency of the process.

2. For each of the following energy converters, name the type or types of energy that we would consider useful:

a) Jet airplane –

b) Television set –

c) Coffee pot –

d) Toaster –

e) You –

Answer 1

you must study hard by learning at dawn as well