Name: ___________________________________________
Period: _______
AICE Physics – Review for Density/Pressure and Waves Test
1. A person stands flat on the ground. Write the equation used to calculate pressure.
2. A block of wood floats partially submerged in water. Write the equation for upthrust (buoyant
force).
If the density of wood is 0.04 kg/m3 and the upthrust is 10 N what is the volume of the wood that
is submerged?
3. A wire stretches when a force is applied.
a) Define stress and strain.
b) Write the equation for Young modulus.
4. Write the SI unit for force. Write the SI unit for area. Combine these to determine the SI base
units of stress and explain your reasoning.
5. Explain why sound waves: a) Cannot travel through a vacuum, b) Cannot be polarized
6. A sound wave travels to the right through air. Describe how the air particles move relative to
the direction of wave travel.
7. A dolphin swims toward a stationary microphone while emitting sound. Explain why the
detected frequency is higher than the emitted frequency using the concept of the doppler effect.
8. Unpolarized light passes through two polarizing filters at different angles.
a) State Malus’ Law.
If the original intensity of light is 8 Wm2 and the angle of the filter is 60 degrees, what is the
intensity of the light after it passes through the filter?
b) Explain how the angle between transmission axes affects the intensity of light.
c) Describe what happens when the transmission axes are perpendicular.
9. A laser produces a pattern of bright fringes on a screen through a double-slit slide.
Write the equation relating fringe spacing, wavelength, slit separation, and screen distance.
If the fringe spacing is 2.0 x 10-2 m, the separation of the slits is 1 mm, and the distance from
slits to screen is 3.0 m. What is the wavelength of the light?
10. A stationary wave forms on a stretched string. Define what is meant by Stationary
(Standing) wave, node and antinode.
11. Light passes through a diffraction grating.
a) Write the diffraction grating equation.
b) Explain why diffraction gratings are useful for measuring wavelength.
c) Monochromatic light passes through a diffraction grating containing 500 lines per mm. If the
first order maximum is observed at a 15 degree angle, what is the wavelength of light?