The ratio of the speed of light in a vacuum to the speed of light in a substance is defined as that substance's ____________________ ____________________ ____________________
Fill in the blank(s) with correct word
index of refraction
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A car accelerates from rest at 2 m/s2. What is its speed 3 s after the car starts moving?
A) 2 m/s B) 3 m/s C) 4 m/s D) 6 m/s E) none of the above
American bombers flying west for bombing raids on Japan in World War II were slowed down significantly when they encountered a jet stream
Indicate whether the statement is true or false
Subarctic climates contain primarily which type of vegetation?
a. mediterranean woodland shrub and grassland b. coniferous forest c. ice cap d. mid-latitude prairie and steppe grassland e. tundra
The __________________ mountain chain runs through northern England and was the source of the coal, ores, and waterpower that fueled the Industrial Revolution.
-Pennines -Pyrenees -Alps -Carpathian -Apennines