Waves are created on the surface of water when we drop a stone into it. Similarly you must have seen the waves generated on a string when both its ends are held in hand and it is shaken. Light is also a type of wave called the electromagnetic wave. Gamma rays, X-rays, ultraviolet rays, infrared rays, microwave and radio waves are all different types of electromagnetic waves. Astronomical objects emit these waves and we receive them using our instruments. All our knowledge about the universe has been obtained through these waves. Gravitational waves are a very different type of waves. They have been called the waves on the fabric of space-time. Einsteine predicted their existence in 1916. These waves are very weak and it is very difficult to detect them. Scientists have constructed extremely sensitive instruments to detect the gravitational waves emitted by astronomical sources. Among these, LIGO (Laser Interferometric Gravitational Wave Observatory) is the prominent one. Exactly after hundred years of their prediction, scientists detected these waves coming from an astronomical source. Indian scientists have contributed significantly in this discovery. This discovery has opened a new path to obtain information about the Universe. i. Which type of wave a light ray is ? (1 marks) ii. What type of rays are Gravitational waves called ? (1 marks) iii. Why are the gravitational waves difficult to detect ? (1 marks) iv. Give any four examples of electromagnetic waves.​

Answers

Answer 1

Answer:

gdfhf

Explanation:

jjjjcjbwwfbooob#kkkkkkkki!vdvdiiiiiibl#dnqljuwhgeyehrhrygrgdyhehegegeggegegegeegegegevegwgegegegsjkegsygegdydheheyrteeeudgeedyeyrf

Related Questions

Between which types of elements do ionic bonds occur, and how do electrons act within the bond?(1 point)

nonmetals and nonmetals, electrons shared

metals and nonmetals, electrons transferred

metals and metals, electrons freely moving

nonmetals and metals, electrons shared

Answers

Answer:

Im pretty sure that its, the metals and nonmetals, electrons transferred.

Between metals and nonmetals, types of elements do ionic bonds occur, and electrons transferred within the bond,therefore the correct answer is option B.

What is an ionic bond?

When two similar or dissimilar atoms form bonds with each other by transferring their valence electron the bond is known as the ionic bond.

The ionic bond is the result of the transfer of the electrons

Ionic bonds are formed between the pair of one electronegative atom and an electropositive atom.

Ionic, covalent, and hydrogen bonds are the three basic types of chemical bonds that are used to generate these chemical compounds from their component atoms.

Ionic bonds are created when electrons are transferred between two bond-forming pairs that can be distinguished by their electronegativity.

Thus, Between metals and nonmetals, types of elements do ionic bonds occur, and electrons are transferred within the bond, therefore the correct answer is option B

Learn more about ionic bonds here

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#SPJ2

Someone please help me!! See PDF to help

Answers

Answer:

They are invisible!

Explanation:

Explanation:

They are invisible is the answer.

Can someone tell me which is which on what i put i dont know what i should put

Answers

I am not great at this so if I’m wrong I’m sorry.

Speed:
Distance per time
40 km/h
A scalar quantity

Velocity:
A vector quantity
20 m/s south
Displacement per time

Write an ecosystem report on rain.

Answers

Answer:

Explanation:

kopkpo

A tall tree has more chance to break during storm why

Answers

Answer:

yes

Explanation:

because the strong winds and the weight and there are more things to break

Explanation:

A tall tree may have more resistance to the wind since it has more mass ( branches, leaves). That means the wind has more mass to push against. Winds may also be stronger at a higher level. Tall trees have been growing longer and have more chances to have been compromised by insects, animals, fungi and so on. They also have less flexibility since they need to be more rigid to hold up the mass of branches they have.

If a body is dropped from the same height once in the equator and then in polar region in which place will it fall faster? why​

Answers

Explanation:

equator.

because the "belly" of the Earth around the equator makes the Earth there thicker than from pole to pole.

the reason is the spinning of our planet. as the spinning speed is the fastest at the thickest part of a ball (at the equator), that ball has the tendency due to the centrifugal force to extend even further there, and the extra material for that is being pulled in from the poles.

therefore, the diameter through the Earth from equator to equator is larger than the diameter from pole to pole.

and that means that there is more mass from equator to equator than from pole to pole.

and that means that gravity is stronger at the equator.

therefore, a body will fall faster at the equator than on a pole.

-. JC=BFF© cough medicine is marketing its' new medicine called "Devil Red". They

want to know why religious customers seem to avoid their product.

Answers

Religious customers seem to avoid their products because;

they have a negative view and understanding of the name "Devil."

When selling a product to potential customers, the brand name of that product could affect sales negatively or positively.

Religious people do not view the devil in a positive manner because they believe that he is responsible for the suffering in the world.

The already existing bias they have in their minds about that name will make them reject any product bearing the name. They might even reason that this medicine will worsen their sickness. For this reason, the medicine called "Devil Red" will have a poor reception by religious people.

Summarily, religious people avid the medicine called Devil Red because they have a negative view of the devil.

Learn more about brand names here:

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pls help question are in the picture

Answers

i think the answer is 1.81

what is the acceleration of a car that goes from 4m/s to 8m/s in 2s use the guess method​

Answers

Answer:

12m/3s is the answer I hope its right...

It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school?

Answers

Answer:

[tex]velocity = \frac{speed}{time} \\ = \frac{16}{.25} \\ \frac{16}{ \frac{1}{4} }(.25 = \frac{1}{4}) \\ 16 \times 4 = 64 km/hour\\ thank \: you[/tex]

can you convert liters to kilometers explain ur answer plsss

Answers

Answer:

Yes we can.

Explanation:

1 Litre= 0.001km

1000 Litre= 1km

When a wave moves from one medium into another at an angle other than 90o the wave will change direction and continue to follow a new straight-line path. This is known as and is responsible for the of white light into its component colors when it passes through a prism.

Answers

Answer:

Mono-chromatic, Poly-chromatic. When a wave moves from one medium into another at an angle other than 90 degrees the wave will change direction and continue to follow a new straight-line path

                                              Thank you

Math is used in the sciences because (1 point)
A numbers are the best way to understand scientific ideas.
B it is a universal means of communicating scientific information.
C scientific data is quantitative.
D scientific data requires significant figures.

Which option is the appropriate scientific unit for distance?
A) Foot
B) meter
C) mile
D) yard

Which tools do investigations in Earth and space science use?
A) computer and field
B) internet and laboratory
C) computer, laboratory and field
D) computer, internet, laboratory, and field

Answers

Answer:

1. it is universal means of communicating scientific information

2. meter

3. computer, internet, laboratory, and field

A stone of mass 600g is thrown vertically upwards. calculate the value of the gravitational force on the stone at its highest point. take g = 10N/kg​

Answers

Answer:

6N

Explanation:

F = m × g

= 0.6 × 10

= 6N

to find the force you first have to convert the mass to kg by dividing 600 by 1000 giving you 0.6

then you can multiply the mass times the gravity giving you a gravitational force of 6N

Different between Atmosphereric Pressure and Liquid Pressure.​

Answers

Answer:

Air pressure or atmospheric pressure is the pressure as the force exerted by the collisions of particles in the air. The key difference between air pressure and liquid pressure is that air pressure allows the gaseous state of matter to be compressible, whereas liquid pressure makes a liquid incompressible

Explanation:

Air pressure or atmospheric pressure is the pressure as the force exerted by the collisions of particles in the air. The key difference between air pressure and liquid pressure is that air pressure allows the gaseous state of matter to be compressible, whereas liquid pressure makes a liquid incompressible

What does v or vf stand for? What SI units are used to measure it?

Answers

Answer:

Ventricular Fibrillation

Explanation:

it is measured bpm ( beats per minute ) of the cardiac muscles of the heart in a poor / disorderly working condition.

Answer:

velocity and final velocity (m/s)

Explanation:

A car drives around the block 400m. What is the distance ?
0 40000m
4 m
400m
O 0.4 m

Answers

The distance traveled by the car will be equal to 400 m.

The given parameter

distance round the block, d = 400 m

To find:

the distance traveled by a car round the block

To travel round the block means that the car will complete a distance equal to the distance round the block.

distance round the block = distance traveled by the car = 400 m

Thus, the distance traveled by the car will be equal to 400 m, since this is equivalent to the distance round the block.

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what is the atomic mass of oxygen?​

Answers

Answer:

[tex]atomic \: mass \: of \: oxygen = 15.99aproximtly = 16 \\ thank \: you[/tex]

Answer:

The atomic mass of oxygen is 15.999 u.

Mass is measured in
a) Litters
b) Centimeter
c) Newton
d) Kilogram

Answers

Answer:

d) Kilogram.

Hope it helps you

Mass is measured in

a) Litters

b) Centimeter

c) Newton

d) Kilogram

how many seconds are there in 1 day . solve along with steps​

Answers

One minute has 60 seconds, One hour has 60 minutes and one day has 24 hours. Thus, 80 x 60 x 24 = 86,400 sec

if my answer helps you than mark me as brainliest

Answer:

[tex]thank \: you[/tex]

1. Alice decides to measure the density of the banana.

a)What equipment will she need to measure it?

b)Explain how she could use that equipment to measure the density.​

Answers

Answer:

A) Measuring cup with water and a scale

Explanation:

Fill the measuring cup with water to a certain point, and record the current height of the water. After placing the banana fully into the water, record the new height of the water. Subtract the old height from the new height. Now you have the banana's volume.

Then, place the banana on a scale to get it's mass.

Perform [tex]\rho ={\frac {m}{V}}[/tex], where p = density, m = mass, v = volume.

Note: 1 milliliter = 1 centimeter^3

Explain one rule of Ultimate Frisbee.

Answers

Explanation:

The object of Ultimate Frisbee is to gain points by scoring goals. The disc may only be passed, and a goal is scored when a player successfully passes the disc to a teammate in the end zone which that team is attacking. The team with the most points at the end of the game is declared the winner.

A car has steady speed of 8 m/s .How far
does the car travel in 8s

Answers

Answer:

Explanation:

Distance traveled = steady speed * time duration = 8m/sec * 8 sec = 64 meters

Answer:

64 m

Explanation:

Multiply 8 m by 8.

Two representative elements are in the same period of the periodic table. Which statement correctly describes the atoms of the two elements?(1 point)
They have the same number of valence electrons.
They have the same number of valence electrons.

They have valence electrons in different energy levels.
They have valence electrons in different energy levels.

They have valence electrons in the same energy level.
They have valence electrons in the same energy level.

They have the same number of electrons.Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?(1 point)Helium atoms have valence electrons in the first energy level, while atoms of the other elements in the group have valence electrons in the second energy level.
Helium atoms have valence electrons in the first energy level, while atoms of the other elements in the group have valence electrons in the second energy level.

Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.
Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.

Helium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level.
Helium atoms have a full outer energy level, while atoms of the other elements in the group do not have a full outer energy level.

Helium atoms have 2 electrons, while atoms of the other elements in the group all have 18 electrons.
Use the periodic table to answer the question.
Which element has atoms with valence electrons in a higher energy level than those of calcium (Ca)?
lithium (Li)
lithium (Li)

cesium (Cs)


bromine (Br)

oxygen (O)
Use the periodic table to answer the question.
Which statement best describes the arrangement of electrons in an atom of fluorine (F)?
There are seven electrons in the first energy level and two electrons in the second energy level.
There are seven electrons in the first energy level and two electrons in the second energy level.

There are five electrons in the first energy level and two electrons in the second energy level.
There are five electrons in the first energy level and two electrons in the second energy level.

There are two electrons in the first energy level and seven electrons in the second energy level.
There are two electrons in the first energy level and seven electrons in the second energy level.

There are two electrons in the first energy level and five electrons in the second energy level.

Answers

1) They have valence electrons in the same energy level.

2) Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.

3) cesium (Cs)

4) There are two electrons in the first energy level and seven electrons in the second energy level.

In the periodic table, elements are arranged in order of increasing atomic number into groups and periods.

In the periodic table, we have an arrangement of atoms based on their respective groups and periods.

If I pick two representative elements in the same period, their number of valence electrons will differ by 1 but they will all be accommodated in the same energy level.

Helium is the first member of group 18. Unlike the other members of the group, its first shell is also its valence shell. It has two and not eight valence electrons like other members of the group.

The electronic configuration of Ca is [Ar] 4s², that of Li is [He] 2s1, that of Cs is [Xe] 6s1, that of Br is [Ar] 4s² 3d¹⁰ 4p⁵ and that of oxygen is [He] 2s² 2p⁴.

We can see that only Cs has  valence electrons in higher energy orbitals than those of Ca.

Lastly, Fluorine is in group 17. There are nine electrons in this atoms. They arranged in such a way that there are two electrons in the first shell and seven electrons in the second shell.

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Does the following word describe a theory, law, or both
“Complex”
A) LAW
B) THEORY
C) BOTH THEORY AND LAW

Answers

Answer:

the answer is b: theory

Explanation:

in science theory can be defined as a scientific idea that uses logic based on wisdom, research, observation, and experience

While swimming a person pushes water backward, why?​

Answers

Answer:

THIS DUE TO THE THIRD LAW OF MOTION.

AS WE PUSH WATER BACKWARD THE WATER WITH SAME FORCE BUT EQUAL DIRECTION PUSHES US SO WE GO IN FORWARD DIRECTION.

Explanation:

While swimming a person pushes water backward because the pushing action create reaction due to which we move forward while swimming.

A mother finds her daughter’s mug of hot cocoa on a table an hour after she had been drinking it. As the mother pours out the cocoa, she sees brown solids in the bottom of the mug. How can this be explained?(1 point)

The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went up.

All dissolved substances will come out of solution over time. If the mother waits long enough, then all of the powder will appear at the bottom of the mug.

The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.

This would only happen if too much cocoa powder was added in the first place, because the solubility should not change.

Answers

Answer:

The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.

Answer:

C

Explanation:

Which statement describes the relationship between bond strength and the melting and boiling points of a substance? A. As the force between the particles increases, the melting and boiling points also increase. O B. As the force between the particles increases, the melting point decreases and the boiling point increases. O C. As the force between the particles increases, the melting and boiling points decrease. O D. As the force between the particles increases, the melting point increases and the boiling point decreases. SUBMIT​

Answers

Answer:

a

Explanation:

???????.............please help:)

Answers

Answer:

It is:

0.00477

0.00000301

Please help me, I really need someone

Answers

Answer:

In plotting position versus time it can be seen that the green line represents  a fixed position at the various times given - the other lines represent changing position with time

The (horizontal) green line describes an object that's not moving.

Whatever TIME you pick to look at the green line, its POSITION is always the same. This is a pretty good description of "not moving".

The other three lines all have different positions at different times, so they all describe motion.

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