Why is mass multiplied by the speed of light squared in einstein's famous equation?
a. mass is only converted to kinetic energy
c. energy is unstable
b. mass isn't conserved like energy is
d. the energy created is moving at the speed of light

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )