A periscope contains mirrors in it that are on opposite sides and are arranged in a 45° angle to each other. It works by light striking the first mirror which cause its to reflect it at a 45° angle to the next mirror.

Depending on the length of the periscope, this continues until the last mirror reflects the incoming light to the eyes of the person using the periscope thereby allowing them to see objects hidden behind or under a barrier.

4 0

3 years ago

On the first month test Keiko answered 19 out of 25 questions correctly. On the second test she got 17 out of 20 correct. On whi

LekaFEV [45]

He/she idk, got a higher score on the second test. How you do it is divide the score by the number out of it so like 19 divided by 25. Umm for the ratio, I'm not really sure, I guess you just do 19:25 and 17:20

8 0

3 years ago

Susan ran a race she ran 5 miles an hour, and the race took her t hours to complete

Rudik [331]

It’s 5×2 which is 10 hope this helps:)

5 0

2 years ago