The specific heat of wood is 2.03 (J/gºC). How much heat is needed to convert 550
grams of wood at 15°C down to 10 °C?

-5582.5J

Explanation:

The quantity of Heat Energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of wood = 550 grams

C = 2.03 (J/gºC)

Φ = (Final temperature - Initial temperature)

= 10°C - 15°C = -5°C

Then, Q = MCΦ

Q = 550g x 2.03J/gºC x -5°C

Q = -5582.5J

Thus, -5582.5 joules of heat is needed convert 550 grams of wood at 15°C down to 10 °C

there is none because earth is stationary and flat.