The model below shows a calcium atom. An image has a mix of red and blue balls in its center and 4 concentric black rings around the center. The first ring from the center has 2 small green balls on it. The second ring has 8 small green balls on it. The third ring has 8 small green balls on it. The outermost ring has 2 small green balls on it. How many electrons are in the third energy level?

Answers

Answer 1

Answer:

8 electrons in the third energy level

Explanation:

From the description,the third energy level has 8 electron (represented by the small green balls you describe)

Answer 2

Answer:

8

Explanation:

I gotcha fam


Related Questions

two teams are playing tug of war. Team A pulls to the right with a force of 450 N. Team B pulls to the left with a force of 415 N

Answers

Answer:

team A - team B = 450 N - 415 N

                                               = 35 N

Explanation:

net force on the rope is 35 N and the direction is towards A.since the two teams are pulling away from each other with the given forces, the net force can be calculated by subtracting the forces.

The net force on the rope is 35N in right direction

What is Net Force? The net force is the vector sum of forces acting on an object,How to calculate the Net force?The force applied by Team A is 450N to the right (Given)The force applied by Team B is 415 N to the left (Given)We need to find the Net force applied on the rope and the direction

As We know that ,

[tex]F_{net} = F_1+F_2[/tex]

Now as The direction of the Team A is right so the Force applied will be positive, that is 450N

Simultaneously , The direction of Team B is left so the Force applied will be negative , that is -415N

Here,

F1 = 450N

F2 = -415N

[tex]F_{net} = F_1+F_2[/tex]

= 450+ (-415N)

= 450-415

=35N

Hence the net force applied is 35N and as the net force is positive the direction will be right

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What happens when a substance is heated, based on the particles model ( the particles)

Answers

Answer:When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Explanation:

A billiard ball moves with 3 kg⋅m/s of momentum and strikes three other billiard balls. What is the total momentum of the balls after the collision?
(1 point)
more than 3 kg⋅m/s
3 kg⋅m/s
It depends on the mass of each ball.
less than 3 kg⋅m/s

Answers

A billiard ball moves with 3 kg⋅m/s of momentum and strikes three other billiard balls that have been just sitting there at rest and not moving.

The total momentum of all four balls after the collision is 3 kg⋅m/s, because momentum is not created or destroyed.  The total amount of it after an event is the same as the total amount of it before the event.

The momentum of the billiard balls after the collision is 3 Kgm/s.

Let the billiard ball be B.

Given the following data:

Momentum B = 3 Kgm/s

To find the momentum of the balls after the collision:

Momentum is simply a multiplication (product) of the mass of an object with its velocity.  Also, momentum is a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

[tex]Momentum = Mass[/tex] × [tex]Velocity[/tex]

[tex]Total \; momentum = Momentum \; B + Momentum \;of \;the \;other\; balls.[/tex]

Since the other billiard balls were at rest (not experience any motion), there velocities would be zero (0) m/s.

Substituting the given values, we have:

[tex]Total \; Momentum = 3 + 0[/tex]

Total momentum = 3 Kgm/s.

Therefore, the momentum of the billiard balls after the collision is 3 Kgm/s.

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When the Moon is a distance of 0.25 D from the Earth, the gravitational force on the Moon from Earth is 16.00 Fm. At what distance with the force on the Moon be 4.00 Fm?

Answers

Answer:

When the gravitational force on the Moon from the Earth = 4.00 Fm, the distance of the Moon from the Earth is 0.5·D

Explanation:

The given information includes;

The distance of the moon from the Earth = 0.25·D

The gravitational force, F, on the Moon from the Earth = 16.00 Fm

When the gravitational force on the Moon from the Earth = 4.00 Fm, the distance of the Moon from the Earth is found as follows;

From Newton's law of gravitation;

[tex]F_{1} = F_{2} =G\dfrac{m_{1}m_{2}}{r^{2}}[/tex]

At r = 0.25·D, F = 16.00 Fm

Therefore;

G×m₁×m₂ = (0.25·D)²×16.00 Fm = D²×Fm = Constant

When, the gravitational force of the Moon from the Earth = 4.00 Fm, we have;

[tex]F = 4.00 \ Fm =\dfrac{D^2 \times Fm}{r_2^{2}}[/tex]

Therefore;

[tex]r_2^{2} =\dfrac{D^2 \times Fm}{4.00 \ Fm} = \dfrac{D^2}{4}[/tex]

[tex]r_2 =\sqrt{\dfrac{D^2}{4}} = \dfrac{D}{2} = 0.5 \cdot D[/tex]

r₂ = 0.5·D

Where;

r₂ = The new distance of the Moon from the Earth

Therefore the distance of the Moon from the Earth when the gravitational force on the Moon from the Earth = 4.00 Fm is r₂ = 0.5·D.

what is meant by pressure?write its unit.

Answers

Answer:

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed

Unit: Pascal (Pa)

1Pa = 1N/m^2

any push or pull on an object is called (n)

Answers

Answer:  Any push/pull on any object is made by a force of some sort.

Explanation:

In physics lab, you measure three quantities: , , and . Suppose that =1.5 kg , =0.4 m , and =3.9 kg/m . Which of the mathematical combinations might be meaningful?

Answers

Answer:

1.5 kg is mass, .4 m is volume, and 3.9 kg/m is volume

Explanation:

When looking at these types of problems, consider each part. First, whenever problems have measurements that have similar units of measurement, check if they are density related. In this case, we use the formula of D=M/V, where D stands for density, M stands for mass, and V stands for volume. Any measurements that relate to grams or pounds are mass. In solids, volume is written in cm or m, while in liquid, volume is considered in liters and gallons. Density is always mass divided by volume, so we know that 3.9 kg/m is the density due to the units provided.

Which option is part of designing a set of experimental procedures

Answers

determining how data will he gathered

Explanation: Apex

Answer:

determining the hypophysis

Explanation:

here you go

What happens to the charged electroscope when a conductor is moved between its plastic sheets, and why?

Answers

Answer: Please find the answer in the explanation

Explanation:

The question goes thus :

What happens to the charged electroscope when a conductor is moved between its plastic sheets, and why?

When a conductor is moved between its plastic sheets of a charged electroscope, the divergence between the brass plate and the gold leaf will decrease.

And why ?

Because of the unlike charges or neutral uncharged charges between the conductor and the plastic Sheets.

Use the motion map to answer the question, describe the position and velocity of the object based moo the motion map?

Answers

Do you have an image?


answer:

Mia is driving at 15m/s. she accelerates for 6sec and reaches 25m/s what is her acceleration

Answers

Answer:

1.67m/s²

Explanation:

acceleration is the change i velocity with respect to time.

Acceleration = change in velocity/time take

Acceleration = final velocity - initial velocity/time taken

Given initial velocity = 15m/s

final velocity = 25m/s

time = 6sec

Substituting the given value into the formula above to get acceleration

acceleration = 25-15/6

acceleration = 10/6

acceleration = 1.67m/s²

Hence Mia acceleration is 1.67m/s²

What is the number at the end of an isotope’s name?

Answers

Explanation:

The liquid contains only one element. -The liquid is a pure substance. The number at the end of an isotope's name is the -mass number. While looking at xenon (Xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group.

Round each of the following to 3 significant figures.
a) 77.0653 g
c) 0.00023350 m
b) 6,310,028.2 mm
d) 10.2030°C

Answers

Answer:

a. 77.1 g

b.0.000234 m

c. 6310000 mm

d. 10.2°C

Explanation:

What is the best use of an atomic model to explain the charge of the particles in Thomason beans

Answers

An atom's negative particles are surrounded by positive matter, so the positive particles are easier to remove. Thomson's atom model is formed by positive and negative particles The positive particles are bigger than the negative,but the atom is still in equilibrium,this is possible because they have the same“density if you wanna call it like that。So,the properties of negative particles allow them to move free。On the other hand,bigger particles,don't have free moving like negative particles。That's why electrons(negative particles)are the definition of electricity,because they can move easily,although this movement depend on the material,metal are better to move in than wood or plastic.


Which of the following hypotheses is written correctly?*
1.If I heat up a tennis ball it will bounce high.
2.Frozen tennis balls will not bounce as high because they are more dense.
3.If a tennis ball is frozen, it won't bounce as high as one that is not frozen.
4.If I freeze a tennis ball, then it will not bounce as high because the ball is more dense.

Answers

Answer:

4 Because Hypothesis sentence always have to be "If" and Then a "then"

if heat is transferred from gas which could happen

Answers

Life would be a disaster

1. What is the velocity if the displacement is 50 m and the time interval is 10 s?

Answers

Answer:

Velocity=5m/s

Explanation:

V=?

S=50m

t=10s

V=S/t

V=50/10

V=5m/s

What is an example of a concentric contraction

Answers

Answer:

an example is a bicep curl

Explanation:

A concentric contraction is a type of muscle activation that causes tension on your muscle as it shortens. As your muscle shortens, it generates enough force to move an object.

Which statement describes an energy measurement?
A. Gravity applies 800 N to a person on Earth's surface.
B. A plane accelerates at 4.1 m/s2
C. An object has a mass of 250 kg.
D. One gram of wood stores 16,000 J.​

Answers

The Answer is D.....

The statement that describes an energy measurement is one gram of wood stores 16,000 J, therefore the correct answer is option D

What is thermal energy?

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

Thermal energy can be produced with help of various means such as by burning fossil fuels, with the help of solar energy.

The Joule is the recognized unit of measurement for energy (J). Kilowatt/hour (kWh), which is used specifically for electric energy, should be listed among the most used units for measuring energy (in fact it is used to calculate electricity bills). The Terawatt/hour (TWh), or one billion kW/h, is used to calculate the output of big power facilities or the country's consumption.

Thus, The statement that describes an energy measurement is one gram of wood stores 16,000 J, therefore the correct answer is option D

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Why would you get a more accurate measure of the volume of an irregular solid by using
displacement instead of measuring with a ruler?

Answers

Answer:Displacement method

Explanation:Placing irregular object in a Tube and then measuring the amount of water that either gets displaced from the container or goes up with the creatube and then measuring the amount of water that either gets displaced from the container or goes showing how much volume irregular object is.

In displacement method can be used to accurately measure the volume of oddly shaped objects.

What is the displacement method?

The water displacement method can be described as a system of measurements used to find the volume of an object that has an irregular shape. A graduated cylinder will be used to measure the amount of liquid volume an object filled, but it can be done with less scientific techniques.

In order to determine the volume of an irregularly shaped solid, a person can use the water displacement formula. A container of water would require to be measured accurately, and precisely, with a starting volume of water.

Next, the solid will need to be completely submerged underwater, without any part of the object above the water. The water level has risen, and the final volume of the water requires to be recorded. The starting volume of the container requires to be subtracted from the final volume to get the volume of only the object.

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Why do prokaryotic cells usually reproduce more quickly than eukaryotic cells?

Choose 1 answer:

(Choice A) A Eukaryotic cells are more structurally complex than prokaryotic cells.

(Choice B) B Eukaryotic cells have less DNA than prokaryotic cells.

(Choice C) C Eukaryotic cells have more cell walls than prokaryotic cells.

(Choice D) D Eukaryotic cells are smaller than prokaryotic cells.

Answers

Prokaryotic cells reproduce more quickly than eukaryotic cells because the latter are more structurally complex. The correct option is A.

Structural complexity of cells

Eukaryotic cells have nuclei and membrane-bound organelles such as mitochondrion. This is unlike prokaryotic cells whose DNA lies freely in the cytoplasm and lacks membrane-bound organelles.

In order words, eukaryotic cells are structurally more complex than prokaryotic cells. Thus, reproductive times in prokaryotes are usually quicker than in eukaryotes.

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Suppose​ s(t) is the position of an object moving along a line at time t0. What is the average velocity between the times ta and t​b?

Answers

Answer:

[tex]V = \frac{s(t_b) - s(t_a)}{t_b -t_a}[/tex]

Explanation:

Given;

position of the object as s(t)

The average velocity is given by;

[tex]V = \frac{s(t_b) - s(t_a)}{t_b -t_a}[/tex]

where;

s(tb) is the object's final position at time tb

s(ta) is the initial position of the object at time ta

tb is the final time of the object's displacement

ta is the initial time of the object's displacement

why sound heard better at night than at day?​

Answers

Answer:

it is because it is quieter at night than in the daytime. Therefore it is easy to hear the sound far away. However, it is only one of the reasons. Actually, sound transmits farther at night may be related to refraction of sound waves! First, sound is the vibration of air, and it is a kind of wave motion.

Explanation:

At night it’s very quiet and during the day most animals are sleeping so they’re not making noises and at night it’s so quiet you could hear farther away

Which are characteristics of refraction

Answers

Answer:

When light travels from one medium to another, the frequency of light does not change. However, the velocity and wavelength change.

Explanation:

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katie measured the distance her friend morgan ran on a straight track every 2s. her measurements are recorded in the table below. what was morgan’s average speed? what was her acceleration for the entire trip?

Answers

Answer:

The average speed of her is 2 m/s.

The acceleration for the entire trip is 0.2 m/s²

Explanation:

Given that,

katie measured the distance her friend morgan ran on a straight track every 2s.

According to given chart,

We need to calculate the average speed

Using formula of average speed

[tex]v_{avg}=\dfrac{D}{T}[/tex]

Where, D = total distance

T = total time

Put the value into the formula

[tex]v_{avg}=\dfrac{20}{10}[/tex]

[tex]v_{avg}=2\ m/s[/tex]

We need to calculate the acceleration for the entire trip

Using equation of motion

[tex]v=u+at[/tex]

[tex]2=0+a\times10[/tex]

[tex]a=\dfrac{2}{10}[/tex]

[tex]a=0.2\ m/s^2[/tex]

Hence, The average speed of her is 2 m/s.

The acceleration for the entire trip is 0.2 m/s²


True or False: Translations are rigid transformations.

Answers

Answer:

Explanation:

Yes, translations are rigid transformations. You can verify that the distances between the points are preserved.

Answer:

True

Explanation:

In translation, all points of the figure move the same distance and in the same direction. The shape and size of the image remains the same as the preimage

A stone falls freely from rest for 8.0 s.
a. Calculate the stone's velocity after 8.0 s.
b. What is the stone's displacement during
this time?

Answers

a) The acceleration that the stone has is the gravitational acceleration and it is always the same (Actually not but assumed to be so)

The gravitational acceleration is 9.81 m/s²

Since this acceleration is always constant, we can use the formula of V = g × t, where V is velocity, g is the gravitational acceleration and t is time.

Let's use this formula: V = g × t = 9.81 × 8.0 = 78.48 m/s

b) Displacement in free falls is calculated by the formula of d = 1/2 × g × t², which is actually derivated from average velocity.

If we use the formula, d = 1/2 × 9.81 × 8² = is found to be 313.92 m

If there is anything you do not understand or anything is wrong, please let me know and I am sorry for my bad English ^^

A car travels 500 km at an average speed of 120 m/s. How long will the trip take in hours?

Answers

Explanation:

120 m/s × (1 km / 1000 m) × (3600 s / hr) = 432 km/hr

t = (500 km) / (432 km/hr) = 1.16 hr

The critical angle for refraction from glass to air is 30° and that from water to air is 37°.Find the critical angle for refraction from glass to water.​

Answers

Answer:

Å

1,55

5 400 Å

n

=

193548,4 km/s

1,55

3 10 m/s

n

c

Vidrio v: =

3 724,14 Å

1,45

5 400 Å

n

=

206 896,5 km/s

1,45

3 10 m/s

n

c

Aceite = v:

07,1

45,1

55,1

n

n

I

Please Help Me with This

Answers

Answer:

Explanation:

a). Find the graph attached for the motion.

b). If a shopper walk 5.4 m westwards then 7.8 m eastwards,

   Distance traveled by the shopper = Distance traveled in eastwards + Distance traveled westwards

                                                            = 5.4 + 7.8

                                                            = 13.2 m

c). Displacement of the shopper = Distance walked westwards - Distance traveled eastwards

                                                      = 5.4 - 7.8

                                                      = -2.4 m

Therefore, magnitude of the displacement of the shopper is = 2.4 m

And the direction of the displacement is eastwards.

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