Please really need help with this

Answers

Answer 1

Answer:

The top of the wavelength is called the crest.

Answer 2

Answer:

-- The arrow in the picture is pointing to a crest of the wave ... one of the peaks.

-- The amplitude of the wave is the vertical distance between one of the crests and the light horizontal line across the middle.

-- The wavelength is the horizontal distance between two crests.

-- Do you know what a 'trough' is ? Well first of all, when you read the word, it looks like you should pronounce it like "trow", but the correct pronunciation is "trawf". (Just like when you have something stuck in your throat, and you cough ... you don't "cow", you "cawf".)

In an old cowboy movie, do you remember the big, open water tanks they used to have along the side of the street in front of the saloon, for horses to drink from while they were tied up to the hitchin post ? THAT tank was called a "watering trough". The bottom of a wave, where the wave could hold water, is the trough of the wave. It's an upside-down crest.

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Question 2How do an ionic bond and a covalent bond differ? A. An ionic bond is an attraction between oppositely charged ions. A covalent bond is a sharing of electrons between atoms. B. A covalent bond is an attraction between oppositely charged ions. An ionic bond is a sharing of electrons between atoms. C. There is no difference. Both an ionic bond and a covalent bond share electrons. D. There is no difference. Both an ionic bond and a covalent bond are attractions between oppositely charged ions. Question 3 What is a bond between a positive and a negative ion called? A. covalent bond B. ionic bond C. metallic bond D. polar bond Question 4 Water (H2O) is composed of the same elements as hydrogen peroxide (H2O2). Why do these substances have different properties? A.The atoms are arranged differently in each molecule. B. The molecules are the same. C. The atoms are the same. D.Water has more atoms than hydrogen peroxide. Question 5 What is the definition of a chemical bond? A. a mutual attraction between the nuclei and electrons in two different atoms B. a mutual attraction between the nuclei and electrons in a single atom C. a mutual repulsion between the nuclei and electrons in two different atoms D. a mutual repulsion between the nuclei and electrons in a single atom

I need help with this today!!!1. When light is scattered a __________ is created.
2. Describe how we see using the 6 parts of the eye.(List 6 parts of the eyes)
3. Describe how we hear using the 8 parts of the ear (List 8 parts of the ear)
4. What do we call the material any wave travels through?
5. Sound are caused by______________.
6. Sound travels in ___________temperatures.
7. A sound will travel _______________ in a denser medium.
8. What happens to the molecules when they are heated?
9. What are 3 ways heat transfer energy?
10. How does convection in the Earth's mantle move plates?
11. What happens during thermal expansion?
12. How radiation is related to EM waves?
13. What is contraction? What would cause it to happen?
I would very apprecieate if you guys help me all of 13 questions

Answers

1. Rainbow (white light is split into its subsequent wavelengths)
2. Light enters through the cornea, is adjusted by the lens, the cones and rods of the retina are responsible for the perception of color and shadows, which are sent through the optic nerve to the occipital lobe of the brain.

3. Sound waves are intercepted by the pinna, travels through the auditory canal, reverberates on the eardrum, the vibrations travel through the ossicles of ear (hammer, anvil and stirrup), continuing to the cochlea and are sent through the auditory nerve to the brain.

4. A medium

5. Vibrations

6. All

7. Faster

8.Their kinetic energy increases

9. Conduction, convection and radiation

10. The heating of metals in the mantle, creates a current which slowly moves the plates above it.

A small child has a wagon with a mass of 10 kilograms. The child pulls on the wagon with a force of 2 Newtons. What is the acceleration of the wagon?

Answers

We know that Force (F) is equal to mass (m) times the acceleration (a)
Mathematically,
F=m.a

Here:
m=10 and F=2
by solving for a we get a = 0.2 meters per second squared.

the answer is 0.2 meter per second squared.

Which property is shown by the rails of a railway track?A) perpendicularity
B) parallelism
C) intersecting lines
D) opposites

Answers

Parallelism is a property shown by the rails of a railway track.

Option B

Explanation:

Parallelism is the property of the lines which do not meet in a plane, those lines which "do not intersect or touch each other" are parallel to each other.

In the given example, railway lines of railway track are said to be parallel since they are at an equal distance to each point so that the wheels of the train be on track. Since these railway lines do not meet each other even at infinity, they are said to be parallel.

Answer:

parallelism

Explanation:

i took the quiz on Edge 2020 and got it right i promise :)

also this question is mostly based on common sense because if two lines will never intersect they are parallel and train tracks will never intersect so they are also parallel and they only word there that has parallel in it is parallelism so the answer has to be parallelism.

Explain why the gravitational acceleration of any object near earth is the same matter what was the mass of the object

Answers

It takes greater force to accelerate an object that has more mass. But the gravitational force between the Earth and an object is greater when the object hass more mass. It works out just right to make any object with any mass accelerate at the same rate.

How do you count the total number of atoms present on one side of a chemical equation?

Answers

Explanation: We use a different element in the chemical equation.

We explain by a example

$2Na + Cl_(2)\rightarrow2NaCl$

In this equation, we use the two elements Na and Cl.

Now, we count the number of atoms present on one side 2 atoms of Na and 2 atoms of Cl then the total numbers will be 4 .

But , we use a molecular formula then we count the number of each element of the molecular formula.

What is the SI unit used to express gravitational potential energy?A.Newton
B.Kilowatt
C.Horsepower
D.Joule

Answers

The SI unit used to express gravitational potential energy is Joule.

Correct Answer D.Joule

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