What happens to a mirror when a ray is directed at it

Answers

Answer 1

Answer:
Nothing happens to the mirror.

However, if the ray is within some suitable range of
wavelengths, the ray is reflected from the mirror's surface.

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How much energy in joule does the heater deliver in 7 secondsThe heater has a power output of 3kW

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Answer:

Transforme 0,4m em mm

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1m = 1000 mm

0,4m = 0,4 * 1000 = 400mm

A compound microscope that has an eyepiece lens with a magnification of 10X and an objective lens with a magnification of 25X will have a total magnification of __________ times.

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Answer:

Explanation:

total magnification = eyepiece lens x objective lens

TM = 10X x 25X

TM = 250X

Plateau period are times in life when

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Good morning Brianiac

Plateau period are times in life when there is no downhill or downhill happened in your life.

It was my pleasured to help you :0

Isotopes have variable numbers of electrons.
a. True
b. False

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Isotopes have the same number of valence electrons

How do elements change as you move down a column in a periodic table? a.the atomic radius decreases b.the number of protons decreases c.the atomic mass decreases d.the electronegativity decreases

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Answer: Option (d) is the correct answer.

Explanation:

Electronegativity is defined as the ability of an atom to gain electrons in order to become stable.

When we move downwards in a group then there will be increase in size of atom. As a result, atomic radius will also increase.

Also, due to increase in size number of electrons will increase and hence, number of protons will also increase. Therefore, atomic mass will also increase.

Thus, we can conclude that elements change as you move down a column in a periodic table as the electronegativity decreases.

As you move down a column :
* the atomic number increases
* the number of protims increases
* the atomic mass increases
* the electronegativity decreases

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