Adding both distances together, you get a total of 1800 miles. With the total travel time of 4 hours, you divide the distance traveled by the time it took. so 1800/4=450 mph
Albert Michelson had many attempts to measure the speed of light during his career, yet his self-acclaimed definitive measurements were achieved using an 8-sided mirror that rotated around an axis at the speed of 528 revolutions per second. He used a large distance between these reflecting mirrors on a mountain-site, and they were approximately 35.5 km apart. In order to determine what the speed of light was, he would calculate in meters per second how long it would take the light to reach the one reflector and travel back compared to the time it took for one of the eight mirrors to complete a 360 degree rotation.
The image distance is 33.3 cm while the image height is 14.2 cm.
<h3>What is a converging lens?</h3>
A converging lens will always have a positive focal length hence, we have to find the object distance as follows;
1/f = 1/v + 1/u
1/12 = 1/v + 1/20
1/v = 1/12 - 1/20
1/v = 0.08 - 0.05
v =33.3 cm
Now;
Magnification = 33.3 cm/20.0 cm =1.67
M = Image height/Object height
1.67 = Image height/8.50 cm
Image height = 1.67 * 8.50 cm
Image height = 14.2 cm
Learn more about focal length:brainly.com/question/16188698
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Echolocation. It’s the process of using sound waves to locate objects, like it’s name suggests.
