124 test three • Name:

  1. __________________ Given that for a wave the velocity v = λ f, what is the velocity of a wave on a chain with a wavelength λ of 48 cm and a frequency f of 3.8 Hertz?
  2. ____________________ A Frigidaire electric stove consumes 7500 Watts at 208 volts. Use the mathematical relationship power = current × voltage to calculate current i in amperes used by the stove.
  3. ____________________ Use Ohm's law voltage = current × resistance and the result above, to calculate the resistance R of the microwave in Ohms (Ω)?
  4. For the data presented below, plot the data points on the graph provided.

Optical image depth Sunshine

Data

image dist i (cm)object dist o (cm)
2.95
5.910
8.815
11.820
14.725
17.630
background rectangle major grid lines axes coordinate labels for the circles below (2.9,5) (5.9,10) (8.8,15) (11.8,20) (14.7,25) (17.6,30) linear regression line data points as circles text layers Optical image depth image dist i (cm) object dist o (cm) y-axis labels 5 8 10 13 15 18 20 23 25 28 30 x-axis labels 2.9 5.9 8.8 11.8 14.7 17.6

  1. __________ For the data presented above, determine the index of refraction for the material by calculating the slope. You can use any two points to determine the slope using the slope formula m = ( y 2 − y 1 ) ( x 2 − x 1 )
  2. __________ The above material is reported to have a theoretic index of refraction of 1.7. What is the percentage error for the slope you calculated based against a theoretic value of 1.7?
  3. ______________ How good is the agreement between the experimental and theoretic value for the data above?
  4. __________ Does the data above provide support for a theoretic index of refraction of 1.7?
  5. What is a refraction?
  6. On the diagram below, sketch the location of the image of the penny and draw the path of a light ray from the penny to the eye.
    Image depth versus object depth measurement diagram for physical science laboratory Eye eye water objects (coin?) container air water penny opaque container
  7. Compare and contrast an echo from laboratory seven (speed of sound) and a reflection from laboratory ten (optics). Use complete sentences, correct grammar, and appropriate vocabulary choices used with clear comprehension of the meaning of the terms used.