The specific heat of copper is 0.385 j/g·°c. what equation would you use to calculate the amount of heat needed to raise the temperature of 0.90 g of copper from 9°c to 26°c?

Q = m c ΔT

Explanation:

Amount of heat required to raise the temperature of an object is give by the equation:

Q = m c ΔT

Where, m is the mass of the object, c is the specific heat and ΔT is the rise in temperature.

It is given that the specific heat of copper is c = .385 J/g°C

Mass of copper, m = 0.90 g

Change in temperature, ΔT = 26°C - 9°C = 17°C

Then amount of heat required to raise the temperature of given amount of copper is:

Q = m c ΔT ⇒ Q = 0.90 g × .385 J/g°C × 17°C = 5.89 J

Thus, 5.89 J is needed to raise the temperature of 0.90 g of copper from 9°C to 26°C.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .