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Chapter 17 Chapter 18 Chapter 20 Mixed Bag Random 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 White light passing through a prism separates into colors because of the differences in the _______ of each color of light. Wavelength or frequency Waves in a rope are transverse waves because the medium’s vibration is __________ to the direction in which the wave travels. perpendicular Consider a wave approaching a barrier with a small hole. What change is the wave likely to undergo as it encounters the barrier. Diffraction Two waves in the ocean meet and combine together. This interference is described as. What is constructive interference? The formula for wavespeed. Wave speed = Frequency x wavelength. The basic difference between electromagnetic waves and sound waves. EM waves do not require a medium while Sound waves do. Electromagnetic waves vary in Frequency and wavelength A translucent material does this with light. Scatters some light. When viewed in blue light, an object that reelects all the colors of light will appear _______ Blue What does light passing through a prism prove? White light is made of all colors. Name three ways that charge can be transferred. Induction, contact, friction What is the difference between direct current and alternating current. In direct current charges only flow in one direction, in alternating it can travel in two directions. The current in a toaster oven measures 10 amps. The resistance of the iron is 12 ohms. Find the voltage. V=IR V = 10amps x 12 ohms V = 120 Volts The voltage is 90 volts and the resistance is 30 ohms of an object. Find the current. V = IR I = V/R I = 90volts/30ohms I = 3 Amps Name three things that affect resistance. Thickness, length, and temperature. The type of current used in your house. Alternating Current (AC) Type of transfer of charge when putting your hand near a Van de Graff generator. Induction A person walks 6 meters forward, realizes he drops his keys and walks back 3 meters to get them. What is his displacement? What is the distance traveled? Displacement = 3m Distance = 9m Describe Newton’s laws of motion. 1st = Inertia 2nd is F=MA 3rd = For every action there is an equal and opposite reaction. Describe refraction. Light has the ability to bend, or refract, as it enters a new medium 2008 Superbowl Champions New York Giants Who said, "Imagination is more important than knowledge." Albert Einstein P waves in an Earthquake travel as what? A series of compressions and rarefactions. Name the two things that affect the strength of an electric field. Amount of charge on the object and distance from the charge. A car moves at 20m/s, 10 s later the car is moving at 50 m/s. Find the cars acceleration. Acc = (Vf – Vi)/time (50m/s – 20m/s)/ 10s Acc = 3m/s2