All categories

3 years ago

PLEASE HELP! SCIENCE QUESTION

Physics

1 answer:

Nikolay [14]3 years ago

7 0

The answer is:

A) Light wave changes direction.

Here is why:

In refraction, the<u> light bends or changes direction</u> when it passes through one medium to another. The change happens because the speed of light is different depending on the medium it passes through because the density of the medium is different.

Another difference would be the angle of incidence. In reflection the angle of incidence is equal to the angle of reflection but in refraction, they are not the same.

You might be interested in

In the fusion reaction occurring in the Sun, how does the mass of helium atom formed compare to the mass of the hydrogen atoms?

PolarNik [594]

B bc there is a lot of hydrogen used

3 0

3 years ago

Which county in Florida is most in need of safe rooms and hurricane ties?

Murrr4er [49]

Probably Pasco. Lol.

8 0

3 years ago

Read 2 more answers

The electric force between two charges A. increases with distance between the charges B. increases if either one of charges gets

beks73 [17]

Answer:

Option (A) , (b) and (d) are correct option

Explanation:

According to Coulomb's law electric force between two charges is given by

$F=\frac{1}{4\pi \epsilon _0}\frac{q_1q_2}{r^2}$

From the relation we can say that force is directly proportional to magnitude of charges and inversely proportional to distance between them '

So if we increase the distance then force will decrease

Increase if any of the charge get larger

If force is attractive then both the charge will be of different sign and is force is repulsive then both the charges of same sign

From above conclusion we can say that (a), (b) and (d) are correct option

6 0

3 years ago

1.) A stone falls from rest from the top of a cliff.

KengaRu [80]

Answer:

Explanation:

ignore air resistance

Let t be the time of fall for the dropped stone.

½(9.8)t² = 43.12(t - 2.2) + ½(9.8)(t - 2.2)²

4.9t² = 43.12t - 94.864 + 4.9(t² - 4.4t + 4.84)

4.9t² = 43.12t - 94.864 + 4.9t² - 21.56t + 23.716

0 = 21.56t - 71.148

t = 71.148/21.56 = 3.3 s

h = ½(9.8)3.3² = 53.361 = 53 m

h = 43.12(3.3 - 2.2) + ½(9.8)(3.3 - 2.2)² = 53.361 = 53 m

4 0

2 years ago

40 POINTS EASY

11111nata11111 [884]

We know, Mechanical Energy = K.E. + P.E.
As ball is at ground, P.E. would be zero. But as it is in motion, it must have some K.E. and that is:

K.E. = 1/2 mv²
K.E. = 1/2 * 1 * 2²
K.E. = 4/2
K.E. = 2 J

In short, Your Answer would be Option B

Hope this helps!

7 0

3 years ago