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2 years ago

Two polarizers are arranged as shown. How much light will reach point X?

Mathematics

2 answers:

lukranit [14]2 years ago

8 0

Answer:

Step-by-step explanation:

The light intensity would be cut by 100% if the second filter is rotated 90 degrees.

d1i1m1o1n [39]2 years ago

7 0

Answer: C) 50%

Step-by-step explanation:

If the polarizes are parallel, then it will be 0%. But if they're both perpendicular than it will be 50%. If they are neither parallel nor perpendicular, than it will be less than 50% and greater than 0%

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Step-by-step explanation:

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1 year ago

Question 6 of 10

Maksim231197 [3]

Answer:

(2.5 , 3.5)

Step-by-step explanation:

We can use the midpoint formula . Here the points are , (2,2) and (3,5) .

• Using Midpoint Formula :-

⇒ M = { (x1 + x2)/2 , (y1 + y2)/2 }

⇒ M = ( 2+3/2 , 5+2/2 )

⇒ M = ( 5/2 , 7/2 )

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2 years ago

Can someone please help me? I don't understand this problem. How would they be the same???

musickatia [10]

Area of rectangle = 15 x 8
=120

area of parallelogram = 8 x 15
=120
so, they have the same area, because the length of a rectangle is the same as the height of a parallelogram and also for the base.

4 0

2 years ago

The 8th and 20th terms of an arithmetic sequence are 20 and 56 respectively. What is the 1st term of the sequence.

Ostrovityanka [42]

Answer:

Step-by-step explanation:

$a_n=a_1+d(n-1)\\\\a_8=a_1+d\cdot7\\\\a_{20}=a_1+d\cdot19\\\\a_{20}-a_8=a_1+19d-(a_1+7d)=12d\\\\56-20=2d\\\\12d=36\\\\d=3\\\\\\ a_1+3\cdot7=20\\\\a_1=20-21=-1$

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2 years ago