PS3.B Flashcard

Energy can be transformed from one form to another, but the total amount remains constant.

Use the formula $$PE = mgh$$ where $$m$$ is mass, $$g$$ is acceleration due to gravity (9.8 m/s²), and $$h$$ is height.

490 J (calculated using $$PE = mgh = 5 kg * 9.8 m/s² * 10 m$$ ).

Radiation.

Use the formula $$KE = \frac{1}{2}mv^2$$ where $$m$$ is mass and $$v$$ is velocity.

200 J (calculated using $$KE = \frac{1}{2} * 4 kg * (10 m/s)^2$$ ).

125 J (calculated using $$KE = \frac{1}{2} * 10 kg * (5 m/s)^2$$ ).

Conduction is the transfer of heat through direct contact between materials.

Convection is the transfer of heat through the movement of fluids (liquids or gases).

Radiation is the transfer of energy through electromagnetic waves.