Help i need an answer

Answer:

Mechanical waves travel through a medium and

Electromagnetic waves can travel through air and solid materials, but also through the vacuum of space.

Explanation:

Answer: 7.62e+23

Explanation:

Answer:

c. 2

Explanation:

The alkaline earth family is the second most reactive group, and it's elements can't be found free in nature. They are called "alkaline" earth metals because they form "alkaline" solutions, hydroxides, when they react with water

Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.

Answer:

A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.

Explanation:

Answer:

1.) Fluorine

2.) Francium

3.) Nonmetals

4.) Metals

5.) Aluminum

6.) Helium

Explanation:

Human teeth are made up of four different types of tissues.

Answer:

it is (Ferric Nitride)

Answer:

Intake

Explanation:

It is the very first thing you do.

Figure 4: Four-Stroke Cycle In the first stroke, also known as the Intake Stroke or Induction, the piston travels from the top dead centre (TDC) to the bottom dead centre (BDC) with the intake valve open and exhaust valve closed. This creates a vacuum due to the increase in volume in the combustion chamber.

The stroke cycle is used in the operating cycle of gasoline or petroleum engines. The first stroke in the 4 stroke cycle is intake. Hence, option A is correct.

An internal combustion (IC) engine is referred to as having four strokes  when the piston is rotating the crankshaft. A stroke refers to the whole journey of the piston along the cylinder, in either direction.

In gasoline/petrol engines, a four-stroke cycle is used. The four strokes are intake (1), compression (2), power (3), and exhaust (4). The intake port is on the right's blue side, and the exhaust port is on the left's brown side.

The piston head is surrounded by a thin sleeve called the cylinder wall, which provides a space for the combustion of fuel and the production of mechanical energy. Therefore, the first stroke of a 4 stroke cycle is intake.

Find more on stroke cycle:

https://brainly.com/question/13164231

#SPJ2

Answer:

B

Explanation:

I'm not 100% sure, but B seems like the most likely answer because the shape of a molecule usually is a major factor in how molecules interact with each other.

I hope that helps.

Answer:

Y(OH)₃

Explanation:

Given ions:

                  Y³⁺      OH⁻

To find a neutral compound that conforms with the formation of the given ions;

We us the exchange of valency approach to solve this problem. The valency will form the combining power of the ions for the combination.

                                    Y³⁺      OH⁻

Combining power        3           1

Exchange of valency    1            3

 Now the compound is        Y(OH)₃

I don’t know

but thank u for the points

I need points hehe

Did you know?

Hawaii is the Widest State in America!!!!!!!

Hello!

Thank you for asking this question!

It would be greatly appreciated if you thanked me and marked me as the brainliest!

Have an amazing day.

The energy transformation which produces electricity and is least likely to

negatively impact the environment is generating electricity from a solar

panel system.

Generating electricity from solar panel involves the use of solar energy from

the sun to generate electricity . This type of energy doesn't emit any type of

harmful radiation or release toxic compounds into the atmosphere which

makes it the least likely to negatively impact the environment.

Other options emit any type of harmful radiation or release toxic compounds

into the atmosphere which makes option D the most appropriate.

Read more on https://brainly.com/question/11867576

The atomic number=5

The mass number=11

In the following element notation,

[tex]\tt \large {{{A} \atop {Z}} \right X}[/tex]

 X = symbol of elemental atom

A = mass number

   = number of protons + number of neutrons

Z = atomic number

   = number of protons = number of electrons, on neutral elements

So for The atomic notation for a particular atom of Boron  :

₅B¹¹

Z=5=atomic number

A=11=mass number

Answer:

Isomers are defined as the molecules or polyatomic ions which have similar molecular formula but different in arrangements of atoms.

Isomers can be found  in food items carrying glucose (C6H12O6), galactose or fructose,  they all have the same chemical formula but differ structurally and chemically.

Glucose is found in vegetables and milk, galactose found in dairy products, and Fructose is found in fruit juices.

Answer:

Lattice energy is an estimate of the bond strength.

KE=3070.625 J

Height = 3.686 m

mass of bike+rider=85 kg

velocity = 8.5 m/s

[tex]\tt KE=\dfrac{1}{2}mv^2\\\\KE=\dfrac{1}{2}\times 85\times 8.5^2\\\\KE=3070.625~J[/tex]

Conservation of energy :

(KE+PE)₁ (downhill) = (KE+PE)₂ (up the hill)

PE₁=0⇒h=0

KE₂=0⇒v=0(stop), so equation becomes :

KE₁=PE₂

[tex]\tt KE_1=3070.625\\\\KE_1=mgh_2\\\\3070.625=85\times 9.8\times h\Rightarrow h=3.686~m[/tex]

Answer:

Monomers contain bonds between metals

Answer:

B: Monomers contain double bonds

Explanation:

I got it right on Edge

Answer:

the formula to calculate speed is d/t.

Answer:

The great jump in ionization energy indicates that the most stable form of the sodium atom- the noble gas configuration, was reached after the removal of the first electron.

Explanation:

Sodium atom has an electronic configuration of 2,8,1. After the first electron has been removed from a sodium atom, the ion formed now has a noble gas configuration which assigns stability to it.

Noble gases have very high ionization energy due to the stability conferred on the by virtue of their completely filled outermost shells. They do not have need to lose electrons to attain stability. Also, because they have the most protons of their period, their atomic radius is reduced as electrons are pulled into the nucleus.

So, the great jump in ionization energy indicates that the most stable form of the sodium atom- the noble gas configuration, was reached after the removal of the first electron.

The great jump in ionization energy after the first electron is removed indicates that the next electron is removed from an inner shell and not from the valence shell.

The ionization energy is defined as the energy required to remove an electron from an atom. There are ionization energies in an atom as there are electrons in the atom.

For sodium atom, five ionization energies are shown which are; 496 kJ/mol, 4562 kJ/mol, 6912 kJ/mol, and 9544 kJ/mol. The great jump in ionization energy after the first electron is removed indicates that the next electron is removed from an inner shell and not from the valence shell.

Learn more: https://brainly.com/question/6284546

Answer:

If the chef is in a hurry we would assume he would want the pan to heat up so copper

Explanation:

Answer:

A. The chef should choose the copper pan.

Explanation:

Copper conducts heat well because its atoms contain only one free valence electrons in the outer shell. Elements with a low number of valence electrons transfer heat the best, and copper has only one. Valence electrons move about freely.

Good luck on your test (Or whatever it is) !!

Answer:

.

Explanation:

Answer:

Carbon carbon | C2H8 - PubChem.

Explanation:

Brainliest plz :)

Answer:

Carbon carbon | C2H8

Explanation:

happy to help

Answer:

Option B - in the outermost region of the solar system, beyond Neptune.

Explanation:

The Oort Cloud is an extended shell of icy objects that exist in the outermost reaches of the solar system.

Answer:

b

Explanation:

i took the test