please help me answer this question

Answer:

Option 2, 3, and 6

Explanation:

Answer:

How is thermal energy transferred during conduction? Check all that apply.

Thermal energy is transferred between particles that are not touching each other.

~~~ CORRECT~~~~Thermal energy is transferred between particles that are in direct contact with each other.

~~~ CORRECT~~~~Thermal energy is transferred between objects of different temperatures.

Thermal energy is transferred between objects of the same temperature.

Thermal energy is transferred from slow-moving particles to fast-moving particles.

~~~ CORRECT~~~~ Thermal energy is transferred from fast-moving particles to slow-moving particles.

Explanation:

Jan 2021 Edge

Answer:

oxygen atoms

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Answer:

P=1.50 g/mL

this is the answer☺

Hop it helps you!

Answer:

Father of the Constitution

Explanation:

Answer:

C

Explanation:

You take the mass/volume to find density.

Answer:

A

Large mass but not as much volume, so not as dense...

Explanation:

Answer:

its C.

Explanation:

ur really pretty btw

Answer:

Second Law of Motion (Law of acceleration)

- It states that the acceleration of an object equals the net force acting on the object divided by the object's mass.

To simplify, use the magic formula triangle

the units of these quantities were as follows: Force (Kilogram meter per second squared or kg m/s² which is also equivalent to one Newton, or N), mass (kilogram or kg), and acceleration (meter per second squared or m/s²).

The Formula on Law of acceleration is:

If the force is missing, Force = Mass × Acceleration or F = ma

If the mass is missing, Mass = Force ÷ Acceleration or m = F/a

If the acceleration is missing, Acceleration = Force ÷ Mass or a = F/m

Answer:

B Meiosis produces gametes

Explanation:

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Answer:

34m/s squared

Explanation:

if yo divide 340m/s by 10m you get 34 and then the m/s and m ad to make m/s squared

Explanation:

Like all EM waves, light transports energy across space. The intensity (energy per unit area and unit time) is proportional to the square of the amplitude of the electric field of the light wave. This energy, however, arrives at a receiver not continuously but in discrete units called photons. The energy transported by an electromagnetic wave is not continuously distributed over the wave front. It is transported in discrete packages. Photons are the particles of light.

Properties of photons:

Photons always move with the speed of light.

Photons are electrically neutral.

Photons have no mass, but they have energy E = hf = hc/λ. Here h = 6.626*10-34 Js is a universal constant called Planck's constant. The energy of each photon is inversely proportional to the wavelength of the associated EM wave. The shorter the wavelength, the more energetic is the photon, the longer the wavelength, the less energetic is the photon.

A laser beam and a microwave beam can carry the same amount of energy. In this case the laser beam contains a smaller number of photons, but each photon in the laser beam has a higher energy than the photons in the microwave beam.

Photons can be created and destroyed. When a source emits EM waves, photons are created. When photons encounter matter, they may be absorbed and transfer their energy to the atoms and molecules. Creation and destruction of photons must conserve energy and momentum. The magnitude of the momentum of a photon is p = hf/c = h/λ.

Problem:

What is the energy of a photon of blue light (λ = 450 nm) and of a photon of red light (λ = 700 nm) in units of eV = 1.6*10-19 J?

Solution:

E = hc/λ.

Blue light: E = (6.626*10-34 Js)(3*108 m/s)/(450*10-9 m) = 4.4*10-19 J = 2.76 eV

Red light: E = (6.626*10-34 Js)(3*108 m/s)/(700*10-9 m) = 2.8*10-19 J = 1.8 eV

Problem:

A 100-W incandescent light bulb uses 100 W (100 W = 100 J/s) of electrical power but only radiates about 15 W of actual visible light. Roughly how many visible photons per second hit the open pages of a typical hardcover book if the pages are about 2 m from the bulb and face it directly?

Solution:

We have to make a variety of estimations and approximations to solve this problem.

To find the number of photons hitting the pages each second, we have to know the light energy hitting the pages per second and the energy per photon. We could compute the latter if we knew the wavelength of the light, but the visible light emitted by a normal incandescent bulb is a mix of wavelengths.

Let us estimate that the average wavelength of the visible light is about 550 nm, which is in the yellow region of the spectrum. This means that the average energy per photon is about

E = hc/λ = (6.626*10-34 Js)(3*108 m/s)/(550*10-9 m) = 3.61*10-19 J = 2.26 eV.

To find the number of photons hitting the pages of a book, we need to know the energy per second that falls on the pages. Let us assume that the light energy from the bulb travels uniformly in all directions. Imagine a sphere centered on the light bulb with a radius R = 2 m. Every second, 15 J or so of visible light energy crosses this sphere. If the light energy is spread uniformly over the sphere, then the intensity of the visible light or the energy per unit area per unit time in units of W/m2 at any point on the inner surface of the sphere will be

I = Plamp/(4πR2),

Electrons are ejected from a metal surface with speeds ranging up to 4.6*105 m/s when light with a wavelength of 625 nm is used.

(a) What is the work function of the surface?

(b) What is the cutoff frequency of the surface?

Answer:

Group

Explanation:

Elements in the same group have similar chemical properties due to them having the same number of electrons in their outer shell

Answer:

Fluorine gas reacts with a solution of sodium bromide in a single-replacement producing aqueous sodium fluoride and bromine gas

Explanation:

i honestly looked this up

Answer:

6 dinosaurs

Explanation:

remaining toys the kid will have are 6 stickers and 1 toy soldier.

Answer:

2. The number of protons it has

Explanation:

1. The number of electrons

This is incorrect because atoms and ions can have the same number of electrons from electron gain or loss

2. The number of protons it has

All atoms of an element have the same number of protons and every element has a different number of protons in its atoms. This is the correct option.

3. The number of neutrons it has

Examples includes carbon-12, nitrogen-13 and oxygen-14. They all have the same number of neutrons. This option is wrong

4. The combined number of protons and neutrons it has

Isobars are atoms that have the same mass number (proton and neutron). Examples are S-40, Cl-40, Ar-40 etc This option is wrong

Answer:

mutation

Explanation:

Answer:

They have same octet configuration ,or we can say that their valence shell has the inert gas configuration ,that of argon and they are stable. They are all common ions.

Explanation: used quizlet

Answer: Atomic theory established that all matter is made of tiny particles, a discovery that led to amazing scientific breakthroughs in areas from modern chemistry to nuclear energy

Explanation:

Answer:

eukaryotic !

Explanation:

all fungi are eukaryotic .

Answer:it’s c

Explanation:

I just took a quiz

A point charge is a model that represents the charge is acting uniformly unit surroundings what other characteristic does a point charge have " it has no volume"

A hypothetical charge at a specific space would be known as a point charge. Even though an electron is often referred to as a point charge, its size might be determined by just a length scale called the electron radius.

Wave amplitude at a specific distance is charged (r). It could be described as energy, although a force is a much more common way to do it.

A point charge is a model that represents the charge is acting uniformly unit surroundings what other characteristic does a point charge have " it has no volume"

therefore, the correct answer will be (C).

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Answer: They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr)

Explanation: Have a great day-

Answer:

Lithium

Explanation:

Ap3x

Answer:

The temperature will be colder on December.

Explanation:

It is given that the angle of the sun rays on June 21st on St. Louis, Missouri hits at 75° angle. And on December 21st, the sun rays are at an angle of 28°.

Now, St. Louis, Missouri is located in the middle of United States which is in the Northern hemisphere.

From here, we can conclude that the temperature of St. Louis, Missouri on December 21st will be much colder as the rays of the Sun is at a much lower angle on the surface than on the 21st June. Due to this lower angle of the sun rays, the energy of the sun will be more spread out and will be less concentrated on the surface on 21st December when compared to 21st June. Also the days are much shorter in December than in June.

Answer Explanation:

Cane preparation (cutting and shredding cane to prepare it for juice extraction) Juice extraction (two technologies are in common use; milling or diffusion) Juice clarification (remove suspended solids from the juice, typically mud, waxes, fibres)

Answer:

-Electrons are delocalized in a "sea of electrons" and are shared among the positively charged metal ions.

Explanation:

In a metallic bond, electrons are delocalized in a sea of electrons and are shared among the positively charged metal ions.

- In a metallic bond, there is delocalization of electrons. The electrons are shared in between the atoms, rather than getting transferred. So, there is no transfer of electrons.

- The electrons are delocalized and shared alongside the nuclei of the atom. There is no existence of electrons around the neutral atoms.

- In the metallic bonds electrons are delocalized and are shared among the positively charged atomic nuclei in the form of a sea of electrons. Thus, electrons are delocalized in a sea of electrons and are shared among positively charged metal ions.

- There is an equal sharing of electrons in the bond. No unequal and partial sharing is there.

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Answer: A

Explanation:

The answer is the first option: A

The Milky Way is a spiral galaxy with a black hole in the center named Sagittarius A. The sun is located with the other middle aged stars in the Milky Way galaxy, which means it is placed midway from the center or edge of the galaxy.

Every element has a unique atomic number. The atomic number is equal to the number of protons within the nucleus of every atom of the element. There are actually no two elements with the same number of protons within their atoms, so this numbers helps to identify an element.

In summary, the one thing that can determine an atom's identity would be the number of protons.

Hope this helps!

The number of protons (atomic number), which determines the chemical characteristics of the atom (element type), determines the nucleus, which is made up of protons with a positive charge and neutrons without a charge. The number of protons determines the identity of an atom.

The "basic building blocks of matter" are described as atoms. It is the lowest component of matter that possesses chemical elemental characteristics. Atoms do not exist alone; rather, they combine to create ions and molecules, which then join together to form matter in huge quantities.

The atomic number (Z) of an atom is the number of protons in the nucleus. The identification of the atom is determined by the element's value, which is its distinguishing characteristic.

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