The specific heat of aluminum is 0.21 cal g°c . how much heat is released when a 10 gram piece of aluminum foil is taken out of the oven and cools from 50 to 10 °c?

A) 84 calories

Explanation:

Specific Heat Capacity is the energy, transferred as heat, that is required to raise the temperature of one gram of a substance by one degree Celsius.

Quantity of heat = mcΔt; Where m is the mass in kilograms, c is the specific heat capacity and Δt is the change in temperature.

Mass = 10 g, specific heat capacity = 0.21 cal g°C, and Δt = 10 °C

Therefore;

Heat = 10 × 0.21 cal g°C × 40 °C

        = 84 calories

c)as speed changes, wavelength and frequency change.

everything changes!

increase masses, decrease separation