Answer:
They all burn fossil fuel is the correct answer.
Explanation:
Cars, power plants, and furnaces all burn fossil fuels such as coal, natural gas, heavy oils, petroleum, oil.
Burning of these fossil fuels results in a release of a huge amount of carbon dioxide and sulfur dioxide gas, into the surrounding that causes air pollution, global warming, acid rain, and these gases present in the environment are highly corrosives and makes suffocating in the environment.
Answer:
The speed of the light ray is halved
Explanation:
The index of refraction of a medium is the ratio between the speed of light in a vacuum (c) and the speed of light in the medium (v):
For medium X, we have
(1)
For medium Y, we have
(2)
Dividing (1) by (2), we find
(3)
In this problem, the index of refraction of medium Y is twice as great as the index of refraction of medium X:
Substituting this into eq.(3), we get
So, as a light ray travels from medium X into medium Y, the speed of the light ray is halved.
Answer:
A. 19.8 cm.
Explanation:
The apparent depth of the combination is
As it mentioned that the two clear but non-mixing liquid having depth of 15 cm that placed in a glass container together
Also the refractive indices would be 1.75 and 1.33
Based on the above information
As we know that
Refractive indices = real depth ÷ apparent depth
1.33 ÷ 1.75 = 15 ÷ apparent depth
So, it would be 19.736842 cm
Now the combination of apparent depth would be
= ( 19.736842 + 15) ÷ (1.75)
= 19.8 cm
hence, the correct option is A.
The first one because the temperature of the water outside is higher than the one on the inside therefore the one on the inside is heating up