Does fire use energy?

What factors affect the upthrust exerted by the fluid on any object immersed on it?

What is the weight of a 2.00-kilogram object on the surface of Earth? (1) 4.91 N (3) 9.81 N (2) 2.00 N (4) 19.6 N

How does the electric force between two charged particles change if particle's charge is reduced by a factor of 3?

A zero-order reaction has a constant rate of 2.30*10-4 M/s. If after 80.0 seconds the concentration has dropped to 1.50*10-2 M, what was the initial concentration?

Use the small-angle formula to calculate the angular diameter of Earth as seen from the Moon. (Note: The linear diameter of Earth is; the average distance between the Moon and Earth is; the small-angle formula is.)

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.

An LC circuit has a 6.00 mH inductor. The current has its maximum value of 0.570 A at t = 0s. A short time later the capacitor reaches its maximum potential difference of 66.0 V. What is the value of the capacitance?

The first law of thermodynamics states that ΔE = Q - W. Is this also a statement of the principle of conservation of energy? Yes, the heat added and the change in internal energy of the gas equal the work done by the piston.