I need help plzzz ahahnsnsnsn

Answer: b, the object reflected the wave.

Answer:

the wave was transmitted through the object

Explanation:

Answer:

+3

Explanation:

there are three more protons than electrons so positive 3

Answer:

I think it's D, cicada.

According to Oxford, a Hemipteran is "an insect of the order Hemiptera, such as an aphid, cicada, or leafhopper."

Hope this helps! I also hope it's not wrong, but I do not think it is.

Also please let me know if this is correct.

Answer:

Chemical Change

Explanation:

Also known as a Chemical Reaction, this is when a substance reacts to something else, changing its Physical and Chemical Properties.

stay the same

Explanation:

Answer:

The axis is tilted in the same direction throughout a year; however, as the Earth orbits the Sun, the hemisphere (half part of earth) tilted away from the Sun will gradually come to be tilted towards the Sun, and vice versa.

Explanation:

hop this helps!!

Answer:

Explanation:

For many species of frogs, a male's mating call is the most well-recognized method of attracting females. ... Other species of females prefer males who call next to a pre-made nest. Females are on the lookout for males who go the extra mile when calling, since they presume these males are good quality mates.

Answer:

Thermal energy is the internal energy of molecules. When we heat an atom then the atoms start to vibrate more rapidly. More is the size of atom, more easily the particles can vibrate. Thus, greater is the size of atom greater will be it is thermal energy.

Whereas particles in a small atom will vibrate with difficulty as less space is available for movement. Therefore, less heat will be enough for collision pf particles. As a result, thermal energy will be less.

Thus, we can conclude that the statement if both objects are at the same temperature, the thermal energy of object A is the same as the thermal energy of object b is false.

Answer:

oven,toaster,fridge,and lights

Explanation:

Answer:

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7.

Explanation:

Please mark as brainliest

Answer:

What is Electronegativity?

Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

How do you find electronegativity?

On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Example of electronegativity

Water, a Polar Bond

Hydrogen has an electronegativity of 2.0, while oxygen has an electronegativity of 3.5. The difference in electronegativities is 1.5, which means that water is a polar covalent molecule

What causes electronegativity?

Electronegativity increases as you move across the periodic table from left to right. This occurs due to a greater charge on the nucleus, causing the electron bonding pairs to be very attracted to atoms placed further right on the periodic table. Electronegativity decreases as you move down the periodic table.

Answer:

A taiga

Explanation:

The percent of potassium in the compound KClO₃ = 32%

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements

[tex]\tt \%mass=\dfrac{Ar~element\times number~of~element~in~compound}{MW~compound}\times 100\%[/tex]

We determine the molecular mass of KClO₃ then we determine the Ar from K (potassium) and the amount in the compound

MW KClO₃ : 122,55 g/mol

The amount of K in KClO₃ = 1

So %K :

[tex]\tt =\dfrac{39}{122,55}\times 100\%=31.8\%\approx 32\%[/tex]

Answer:

They both have the same temperature.

Explanation:

When two or more substances of different temperature are mixed, heat is transfered from hot to clod substances till they attain thermal equilibrium i.e have the same temperature

Answer:

This reaction is called an exothermic reaction. In Part B of this activity, baking soda was added to vinegar. Baking soda reacts with the vinegar to produce carbon dioxide gas, sodium acetate, and water.

Explanation:

Answer:As rock fragments bump against each other during erosion, the shapes of the fragments can change. Erosion also affects the level of sorting—separating of items into groups according to one or more properties—of sediment. Sediment is often well-sorted when it has been moved a lot by wind or waves.

Answer:

1. It can cause sediment to wear down and break into peices

2.I dont exactly know

3.I dont really know

4. canons?

Answer:

It is C :P

HOPE IT HELPS U!

Answer:

physical property

Explanation

Answer:

Helium is a chemical element with symbol He and atomic number 2. Classified as a noble gas, Helium is a gas at room temperature so in result a physical property.

And BTW, your not stupid everyone is smart they just have to apply themselves and give it their all!

best wishes!!

Answer:

dysprosium (Dy)

Is a metal from the lanthanide series.

Explanation:

Answer:yes

(: did this help?

Periods are the horizontal rows of the periodic table, with each period number indicating the number of orbitals for the elements in that row.

A periodic table, also known as an elemental periodic table, is a tabular representation of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is widely regarded as a chemistry icon.

The arrangement of the periodic table also allows scientists to detect trends in element properties such as electronegativity, ionization energy, and atomic radius.

Periods are basically the horizontal rows. Periods represent the relationship of orbitals, or likely areas where electrons will be found, inside the atom's outermost shell. The periods correspond to atoms with a more electron-rich core of inner shells.

Thus, the number of each period in the modern periodic table represents the number of orbitals.

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Answer:

the answer is 6 1/12

Explanation:

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Answer: Its filtration

Explanation:

I took the test and got it right

Answer:

A

Explanation:

it is filtration

Answer:

5596.8 m

Explanation:

42.4 minutes is equal to 2544 seconds.

2544s * 2.2m/s= 5596.8

Answer:

a. islands in the Pacific Ocean.

Explanation:

A volcanic belt is a large region of intense volcanic activity.

We can clearly see that volcanic belts are regions where volcanic activity is maximum. Volcanic belts are characterized by eruptions of gases, ash, rock, lava etc.

Such eruptions push magma to the earth's surface at high temperature. The area around the Pacific that is prone to volcanic activities is generally referred to as the 'ring of fire'.

Along the boundary of the Earth's plates, volcanic belts develop. Huge chunks of the crust diverge (pull apart) or converge (push together) at plate boundaries. Because of this, the crust frequently breaks, enabling magma to rise to the surface. It is formed along islands in the Pacific Ocean. The correct option is a.

The Alpide Belt, which spans from the Azores through the Mediterranean and Middle East to the Himalayas and Indonesia, where it joins the Circum-Pacific Belt, and the Circum-Pacific Belt itself are the two main seismic belts that encircle the Pacific Ocean.

On land and in the oceans, tectonic plate boundaries are home to the majority of the planet's volcanoes. Volcanoes on land develop when one tectonic plate slides beneath another. A thinner, heavier oceanic plate typically subducts beneath a thicker continental plate.

Thus the correct option is a.

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Answer:

NA = 6.02214076×10^23 mol−1.

Explanation:

1 mole of helium gas contains 6.02 x10^23 helium atoms. So multiply this by 3 after solving the equation.

There are 1.8066 x 10 ^24 atoms in 3 moles of helium

1 mole of any substance is equal to 6.022 × 1023 atoms , This is called the  Avogadro's Number and it represents 12 grams of pure carbon.

Hence,

I mole of Helium = 6.022 × 1023 atoms

Therefore,  

3 moles of helium will be 3 x   6.022 × 1023 atoms

3 moles of helium =1.8066 x 10 ^24 atoms

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Answer:

gallon of gasoline

rock sitting at the top of a cliff

sleeping dog

stopped car

Explanation:

Potential energy is defined as the stored energy that an object has because of its position or shape. It is impossible to observe this energy's effects until this energy is released and transformed into some form of energy. We have two types of potential energy:

Gravitational potential energy: We can define gravitational potential energy as energy stored by a gain in height that an object makes.

Elastic potential energy: Elastic potential energy is defined as the energy stored in elastic objects (springs, rubber bands) when compressed or stretched from their natural position.

From the list of the options given: gallon of gasoline, rock sitting at the top of a cliff, sleeping dog and stopped car are all potential energy.

Answer:

In other words, atoms of one element can be changed into atoms of another element by transmutation. This occurs either through nuclear reactions in which an outside particle reacts with a nucleus, which can be supplied by a particle accelerator, or through radioactive decay, where no outside particle is needed.

Answer:

Each proton and each neutron contribute _atomic mass_amu to an atom. Amu means _ unified atomic mass unit_

Each proton and each neutron contribute atomic mass amu to an atom. Amu means unified atomic mass unit.

Protons, electrons, and neutrons are the charged particles that are present in the atoms. They together made up the atom. The atoms contain a nucleus in between and around the nucleus, electrons are present.

Atoms also contain different shells of different energy levels. In these orbitals or shells, electrons, protons, and neutrons are present. These particles are of different energy levels.

The atomic mass is made up of a total of protons and neutrons. The atomic number is the number of protons.

Thus, each proton and each neutron contribute atomic mass amu to an atom. Amu means unified atomic mass unit.

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Answer: b

Explanation: cheese

When heated, atoms give off different colors of light because different atoms emit different colors when the electron jumps from their ground state to a higher energy level, this is called excitation. When electrons move energy levels, a photon is given off (this is emission) and photons have different wavelengths and frequencies so they will have different energies that produce different colors of light.

i hope this made sense! sorry haha

Answer:

Explanation:

The volume of the crystal can be found by using the formula

volume = final volume of water - initial volume of water

From the question we have

volume of crystal = 60 - 27

We have the final answer as

Hope this helps you

Answer:

33 ml

Explanation:

60 - 27 = 33 ml

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