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Nuetrik [128]
3 years ago
14

Why does a beam of light bend when it passes into a new medium?

Chemistry
1 answer:
Ludmilka [50]3 years ago
3 0

Answer + Explaination: A beam of light bends when it passes into a new medium because light travels slower in denser medium.

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Answer this question and you’ll get 20 points Explain how energy is transfers using the major forms of energy in a circuit descr
svetlana [45]

Answer:

When the fuel is burnt, the hot gas rushes out of the rocket due to the great heat and pressure produced by the release of chemical energy in burning. Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another.

Explanation:

4 0
3 years ago
Which describes an element?
sesenic [268]

Answer:

I think it's D one. Because all others are wrong

3 0
3 years ago
An environmental study of a certain metropolitan region indicates that given population x (in thousands), the average daily leve
Vedmedyk [2.9K]

Answer:

In 4 years the carbon monoxide level reach 7.8 parts per million.

Explanation:

The average daily level of carbon monoxide in the air is given by :

c(x) = 0.5x + 2 parts per million..[1]

The population of the region after t years is modeled by the formula :

x(t) = 10 + 0.1t^2...[2]

If level of carbon monoxide level reach 7.8 parts per million in t years.

Using [1] to calculate value of x.

c(x)= 7.8 parts per million

c(x) = 0.5x + 2  parts per million

7.8 parts per million = (0.5x + 2 ) parts per million

Solving for x , we get ;

x = 11.6

Using [2] to calculate value of t.:

x(t) = 11.6

11.6 = 10 + 0.1t^2

Solving for 't' we get ;

t = 4 years

In 4 years the carbon monoxide level reach 7.8 parts per million.

3 0
3 years ago
The halogens, the elements of Family 17 on the periodic table, combine easily with elements from Family 1. When a halogen reacts
timofeeve [1]

Answer:

When halogen elements react with group one metals they form halide salts.

Explanation:

The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. Halogens are very reactive these elements can not be found free in nature. Their chemical properties are resemble greatly with each other. As we move down the group in periodic table size of halogens increases that's way fluorine is smaller in size as compared to other halogens elements. Their boiling points also increases down the group which changes their physical states. i.e fluorine is gas while iodine is solid.

When halogen elements react with group one metals they form halide salts.

Alkali metals have one valance electron and halogens needed one electron to complete the octet thus alkali metals loses one electron which is accepted by halogens atom and form ionic compound called halide salts.

For example:

2Na + Cl₂ → 2NaCl

2K + Cl₂  → 2KCl

2Rb + Cl₂ → 2RbCl

2Li + Cl₂ → 2LiCl

With bromine:

2Na + Br₂ → 2NaBr

2K + Br₂  → 2KBr

2Rb + Br₂ → 2RbBr

2Li + Br₂ → 2LiBr

With iodine:

2Na + I₂ → 2NaI

2K +  I₂ → 2KBI

2Rb + I₂ → 2RbI

2Li + I₂ → 2LiI

4 0
3 years ago
Clathrate hydrate research is done by Professor Kend Janda at UC Irvine. Look up clathrate hydrate with a general internet searc
lidiya [134]

Answer:

water, host

Explanation:

Clathrate hydrates are the crystalline water-based solids which physically resembles with the ice, in which the small non-polar molecules or smaller polar molecules with the large hydrophobic moieties are usually trapped inside the "cages" of the hydrogen bonded as well as frozen water molecules.  

<u>Clathrate hydrates are the clathrate compounds in which water creates the cage and the water behaves as a host molecule and guest molecule is typically a gas or liquid.</u>

3 0
3 years ago
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