HOMEWORK 3/17/14- 3/21/14

  1. Which of the following items would work well in space?
  1. Drum set
  2. Guitar
  3. Radio
  4. Flashlight

Why?

  1. For a lab experiment, Antonia wants to measure the amplitude of a transverse wave. Which of the following distances is equal to the amplitude of the transverse wave?
  1. The distance from one crest to the next
  2. The distance from the highest point to the lowest point
  3. The distance from one trough to the next
  4. The distance from the rest position of the wave to its highest point

Why?

  1. Jeff and Lyle were fishing int eh ocean. Jeff bet Lyle that the ocean waves moving quickly by the floating boat would not carry away a piece of bread that Jeff threw into the water. Which of the following is a valid explanation for this claim?
  1. Ocean waves are surface waves, which move the particles of their medium in circles.
  2. Ocean waves are longitudinal waves, which move the particles of their medium back and forth.
  3. Ocean waves are combination waves, which can move particles along the ocean surface.
  4. Ocean waves are transverse waves, which move the particles of their medium up and down.

Why?

  1. The amount of energy that a wave carries is related to the wave’s amplitude and wavelength. Which of the following waves would carry the most energy?
  1. C.
  1. D.

Why?

SOUND WAVES IN WATER

TIME (S) / DISTANCE TRAVELED (KM)
1 / 1.5
2 / 3.0
3 / 4.5
4 / ??
  1. The data above was collected for sound waves traveling through water. If all other factors were the same, how far did the sound wave travel after 4 seconds?
  1. 5.0km
  2. 5.5km
  3. 6.0km
  4. 6.5km

Why?

  1. What is the frequency of a wave that has a wavelength of 3m and a speed of 18m/s?
  1. 3Hz
  2. 6Hz
  3. 9Hz
  4. 15Hz

Why?

  1. Lanh performed a lab experiment about wave motion. He and a partner held opposite ends of a rope. Each person generated a wave crest in the same direction at the same time. What happened when the wave crests met?
  1. The amplitude of the combined wave was larger than the amplitude of the individual waves.
  2. The amplitude of the combined wave was smaller than the amplitude of the individual waves.
  3. The amplitude of the combined wave was the same as the amplitude of the individual waves.
  4. The waves cancelled each other out.

Why?

  1. What is the kinetic energy of a 30kg greyhound that is running at a speed of 17m/s?
  1. 255J
  2. 510J
  3. 4,335J
  4. 8,670J

Why?

  1. Which of the following correctly describes the difference between an atom and a molecule?
  1. An atom consists of one or more molecules chemically joined together.
  2. An atom is the result of the physical separation of the molecules
  3. A molecule consists of one or more atoms chemically joined together.
  4. A molecule is one or more atoms physically joined together.

Why?

  1. Which of the following produces energy from processes that do not involve a chemical change?
    a. A bonfire

b. a fossil fuel power plant

c. a solar cell

d. a car

Why?