28. Determine whether each change requires Phase Change
Gain Energy or Lose Energy
Sublimation (s →g)
Deposition (
gs)
Melting (s 0)
Freezing (1 → s)
Vaporization (1 →g)
Condensation (g → 1)

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.