crystalclear99
14.12.2020 •
Biology
Have a subject stand one foot away from a wall in a dark room. Have an assistant stand 10' back from the wall and shine the light at the friend's head. Observe the shadow's darkest (umbra) and lightest area around the edges of the shadow (penumbra). Measure the width of the penumbra. Measure the umbra. Record your data. Have the assistant with the light move 3 feet closer to the subject and shine the light on the subject's head. Measure the penumbra and umbra at this distance. Record your data. Have the assistant move another 3' closer. Repeat the measurements and record the data in a table like below.
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Ответ:
Can you subscribe to my utube channel for a Florida_kik
Explanation:
Ответ:
6
Step-by-step explanation:
This is a case of combination since the order does not matter, it only matters that there must be a marble in each one inside, therefore we must apply its formula.
xCn = n! / x! * (n - x)!
n, in this case it would be 4 because we must subtract 2 from the total 6, since there must already be one inside in each display case.
x = 2, since it is the number of showcases.
Replacing:
2C4 = 4! / 2! * (4 - 2)! = 6
Which means that you can in six different ways.