A lab technician needs to clean medical instruments that have been exposed to bacteria. which electromagnetic wave would be most useful for this task? infrared radio ultraviolet microwave

Answers

Answer 1

The ultraviolet electromagnetic wave would be most useful for this task.

UV radiation is a well-known method for repressing bacteria that has certain advantages over liquid disinfectants because it may be used to clean surfaces, liquids, the air, and rooms while also operating autonomously and remotely.The disinfection of surface DNA, RNA, and bacteria is accomplished with UV light. Up to 99 percent of surface contamination is removed from research tools, containers, and other items using the UV Clave chamber's highly targeted UV irradiation. Medical instruments that are exposed to bacteria should be cleaned with UV light to remove the bacteria.Microbes are killed or made inactive by UV-C radiation by destroying their deoxyribonucleic acid (DNA).

infrared microwave and radio waves will not be effective in removing the contamination and bacteria.

learn more about Ultraviolet waves here:

https://brainly.com/question/1377878

#SPJ10

Answer 2

Answer: Ultraviolet

Explanation: got it right on edge


Related Questions

If a liquid has a density of 1.67 g/cm^3, what is the volume of 45g of the liquid?

Answers

Answer:

V = 26.95 cm³

Explanation:

Density is given by the formula :

ρ = m÷V

Density = mass ÷ Volume

Given both density and mass we rearrange, substitute and solve for Volume :

Rearranging the equation to make Volume the subject :

ρ = m÷V

ρV = m

V = m÷ ρ

Now substitute :

V = 45 ÷ 1.67

V = 26.9461077844

Take 2 decimal places as the density is 2 decimal places :

V = 26.95

Units will be cm³ as it is volume

Hope this helped and have a good day

which of the following travels the fastest​

Answers

Answer:

All move at the same speed

Explanation:

because they are all waves of the electromagnetic spectrum and they all travel at the speed of light

(300 000 km/s)

At first the contact force from mud on each wheel is 2000n explain why the wheels will start to sink

Answers

The wheels will start to sink due to no friction by the mud to take the grip.

What is frictional force?

When an object is moving on a rough surface, it experiences opposition. This opposing force is called the friction force.

Given is the contact force from mud on each wheel is 2000N  . Assume the only other force acting on the block is that due to gravity.

The friction force is given by

f = coefficient of friction x Normal or contact force

The mud is soft and viscous. When the wheels are rotating, the car will be sinking in mud. This happens due to no grip. Car tries to get out of the mud, but instead it digs itself.

Car needs grip or frictional force to get out from the mud. There is no friction with the ground. Exactly friction makes car's wheels to displace.

Thus, the wheels of the car sink because of no friction from mud.

Learn more about friction force.

https://brainly.com/question/1714663

#SPJ1

1. George is traveling to Boston from Springfield. Springfield is 144
kilometers from Boston. If speed-(distance)/(time), how fast was he
going if it took him 3 hours to get to our state capital?

Answers

Answer:

48 kilometers per hour

Explanation:

144/3 = 48 km/h

Against the park ranger's advice, a visitor at a national park throws a stone horizontally off the edge of a 83 m high cliff and it lands a distance of 93 m from the edge of the cliff, narrowly missing a visitor below.
What was the initial horizontal velocity of the rock, in m/s? You can round your answer to the hundredths place and use g ≈ 10 m/s2.

Answers

the answer it would be 164 m

state advantages of ultrasonic sound in determining the depth of the ocean ​

Answers

Answer:

It has greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.

Explanation:

Hope this helps you!

6.Riding his bike, Mike can start from rest and get going at 10 m/s in 4 seconds. Joy can get
going 15 m/s in 5 seconds. Who has a greater acceleration? How do you know?

Answers

Answer:

Joy has a greater acceleration.

Explanation:

Mike

v = v₀ + at

10 = 0 + 4a

a = 2.5 m/s²

Joy

v = v₀ + at

15 = 0 + 5a

a = 3 m/s²

--

Using the UAM equations, we can determine that Joy's acceleration is 3 m/s² while Mike's acceleration is only 2.5 m/s².

A compound microscope that has an eyepiece lens with a magnification of 10X and an objective lens with a magnification of 25X will have a total magnification of __________ times.

Answers

Answer:

35

Explanation:

total magnification = eyepiece lens x objective lens

TM = 10X x 25X

TM = 250X

Select the correct location on the image.
Identify the magnetic north pole of Earth’s magnet.

Answers

The magnetic north pole of the earth's magnet is in the geographic south pole.

There are two magnetic and geographic poles each, north and southThe two geographic poles are the locations where the earth's axis of rotation passes through which is imaginaryThe magnetic north and south poles are not the same as the geographic north and south polesIn a compass, the needle points to the magnetic north poleBy convention, the magnetic north pole corresponds to the geographic south poleThe magnetic south pole corresponds to the geographic north poleThe magnetic field lines of a magnet start from the magnetic north pole and end at the magnetic south pole

The magnetic north pole of the earth's magnet is the geographic south pole.

Learn more about earth's magnetism here:

https://brainly.com/question/3928159

#SPJ10

How many moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 1024 fluorine atoms?

Answers

12.4 moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms. Details about number of moles can be found below.

How to calculate number of moles?

The number of moles in a molecule of a substance can be calculated by dividing the number of molecules by Avogadro's number.

According to this question, a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms. The number of moles in this sample can be calculated as follows:

no of moles = 7.45 × 10²⁴ ÷ 6.02 × 10²³

no of moles = 1.24 × 10¹

no of moles = 12.4moles

Therefore, 12.4 moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms.

Learn more about no of moles at: https://brainly.com/question/14919968

#SPJ1

Which of the following consists of photovoltaic cells?
1. Solar panels
2. Rube Goldberg device
3. Solar oven
4. Electric generator

Answers

the answer is number 1 solar panels

26.6 00
Fig. E26.6 both meters are ide-
alized, the battery has no appre-
ciable internal resistance, and the
ammeter reads 1.15 A. (a) What
does the voltmeter read? (b) What
is the emf & of the battery?
26.7 For the circuit shown
For the circuit shown in Figure E26.6
V
45.0 Ω
25.0 Ω
ww(A)
|15.0 Ω
www
|15.0 Ω
W
www
ww
4+
35.0 = ?
10.0 Ω

Answers

a. The voltmeter reads 0.053 volts

b. The electromotive force, emf of the battery is 0. 106 volts

How to determine the voltmeter reading

a. Given the current  = 1. 15A

Voltmeter reads the voltage = V

Resistance could be gotten from the diagram = R

V = IR

To find the resistance from the structure

First, find the resistance in parallel

Resistance in parallel = 1/R1 = 1/R2 + 1/R3 = 1/25 + 1/15 + 1/15 = 0. 17 Ohms

Now, find the resistance in series

Resistance in series = R1 + R2 + R3 = 45 + 0. 17 + 10 = 55. 17 Ohms

Finally, the  resistance in parallel = 1/35 + 1/55. 17 = 0. 028 + 0. 018 = 0. 046 Ohms

Substitute values into the equation

V = IR

V = 1. 15 * 0. 046

V = 0. 053 Volts

b. To find the Emf, use the formula

Emf =  V + Ir

Substitute the values into the formula

Emf = 0. 053 + 1.15 * 0.046

Emf  = 0. 053 + 0. 0529

Emf = 0. 106 volts

Therefore, the voltmeter reads 0.053 volts and the electromotive force of the battery us 0. 106 volts

Learn more about electromotive force here:

https://brainly.com/question/17082851

#SPJ1

3. State Newton's first and second laws of equation. A. A body of mass 2kg move vertically upwards has its velocity increased uniformly from 15m/s to 45m/s in 5s. neglecting air resistance, the upward vertical force acting on the body. [g=10ms 2] B. The velocity ratio and efficiency of pulley are 8 and 85% respectively. How much effort is required to lift a load of 120kg with this system [g=10m/s²] ​

Answers

Answer:

See below.

Explanation:

Newton's First Law

A body at rest persists in its state of rest, and a body in motion remains in constant motion along a straight line unless acted upon by an external force.

Newton's Second Law

A body's acceleration is directly proportional to the force exerted on it and is in the same direction as the force.  F=mA  (Force = Mass x Acceleration)

==============================================

A. A body of mass 2kg move vertically upwards has its velocity increased uniformly from 15m/s to 45m/s in 5s. neglecting air resistance, the upward vertical force acting on the body. [g=10ms 2] B. The velocity ratio and efficiency of pulley are 8 and 85% respectively. How much effort is required to lift a load of 120kg with this system [g=10m/s²] ​

Force = Mass x Acceleration

Acceleration is (45m/s - 15 m/s)/5 sec) or 6 m/sec^2

Force = 2kg*(6 m/sec^2)

Force = 12 kg*m/s^2    1 kg*m/s^2 is the SI unit for force, and is named 1 Newton(N), after . . . Newton.

Force = 12N

B.  I'm not sure how to interpret "The velocity ratio and efficiency of pulley are 8 and 85% respectively."  I'll assume "effort" is the energy required.  

I'll calculate the energy required in a perfect system, and then we'll consider the efficiency issues.

By lifting an object with mass off the Earth's surface (height = 0 meters) we impart a potential energy, PE, to the object.  This energy is stored in the object until it is allowed to move back closer to Earth.  This potential energy is given by the equation:

PE = mgh

where PE is potential energy in Joules, m is mass in kg, g is the acceleration due to Earth's gravity (9.8 m/sec^2, but we'll use 10 m/sec^2 as stated in the problem), and h is the vertical distance moved, in meters.

PE = (120kg)(10 m/sec^2)(h).  We aren't given a height, h.  Let's express the answer in terms of 1 meter:  How much potential energy is put into the 120kg load to raise it 1 meter?

PE = (120kg)(10 m/sec^2)(1 m)

PE = 1200 kg*m^2/sec^2 or 1200 kg*m/sec^2 per meter

The unit kg*m/sec^2 is 1 Joule

PE = 1200 Joules/meter

1200 Joules are required to raise 120kg 1 meter.  This is increased due to the less-tha-100% efficiency of 85%.

At 85% efficiency, the energy required would be 1200J/0.85 = 1412 J to raise 120kg 1 meter, with 85% efficiency,   I don't6 know how to handle the velocity ratio number.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

A 20kg object acceleration by a force of 200N with coefficient of kineticfriction is 0.4 what is acceleration of the object?​

Answers

Answer:

Given - M = 20 kg

k = 0.4

F = 200 N

To find - acceleration

Solution -

F= kMA

200 = 0.4 * 20 * acceleration

200 = 8 * a

a = 8/200

a = 0.04 m s²

a = 0.04 m s²

the question is confusing ​

Answers

Alpha particles have highest mass.

Alpha particles are most ionising.

Gamma particles are the most penetrating.

Beta particles are negatively charged.

Gamma particles have the highest speed.

Comparing the three types of ionizing radiation-alpha particles have the greatest mass. Alpha particles have approx 4 times the mass of a proton or neutron and 8,000 times the mass of a beta particle. Ionising power of alpha particle is very high due to double positive charge, large mass as compared to a beta particle. Alpha particles can cause multiple ionisations within a very small distance. Beta radiation is more penetrating than alpha radiation. beta radiation can pass through the skin, but it is absorbed by a few cm of tissue of the body or a few mm of aluminum. Gamma radiation is the most penetrating of the three radiations. Alpha particles are positively charged, while beta particles are negatively charged, and gamma radiation is electrically neutral. Gamma rays are similar to visible light but they have higher energy. Gamma rays are emitted along with alpha or beta particles during radioactive decay.

learn more about gamma rays here:

https://brainly.com/question/2399890

#SPJ10

Samuel pushes against a door with a force of 10N, but the door doesn't move. Has Samuel done work on the door?

Answers

No, Samuel hasn't done work, Since the door doesn't move.

What is work done?

Work is said to be done when an applied force moves an object over a given distance.

W = Fd

where;

W is work doneF is the applied forced is the distance

Since the door doesn't move, we can conclude that Samuel hasn't done work.

Learn more about work done here: https://brainly.com/question/8119756

#SPJ1

Two marbles, one twice as heavy as the other, are dropped to the ground from the roof of a building. Just before hitting the ground, the heavier marble has 1. as much kinetic energy as the lighter one. 2. twice as much kinetic energy as the lighter one. 3. half as much kinetic energy as the lighter one. 4. four times as much kinetic energy as the lighter one. 5. impossible to determine

Answers

Given that one marble is twice as heavy as the other, the correct statement is: the heavier marble has twice as much kinetic energy as the lighter one

How to determine the energy of the lighter marbleMass = mAcceleration due to gravity = gHeight = hKinetic energy of light marble (KE₁) =?

KE = PE = mgh

KE₁ = mgh

How to determine the energy of the heavier marbleMass = 2mAcceleration due to gravity = gHeight = hKinetic energy of heavier marble (KE₂) =?

KE = PE = mgh

KE₂ = 2mgh

How to campare both kinetic energies Kinetic energy of light marble (KE₁) = mghKinetic energy of heavier marble (KE₂) = 2mghComparison (KE₂ / KE₁) =?

KE₂ / KE₁ = 2mgh / mgh

KE₂ / KE₁ = 2

Cross multiply

KE₂ = 2 × KE₁ =

KE₂ = 2KE₁

Learn more about energy:

https://brainly.com/question/10703928

#SPJ12

Question 2 of 32
What did Ernest Rutherford's experiment of a beam of alpha particles aimed
at a sheet of gold foil lead him to conclude?

Answers

Sthbtbetbtwbetbetbtwsbt

NEED ANSWER ASAP!!!! Tony pulls a luggage cart at an angle of 30° to the horizontal. The luggage cart has a mass of 35 kg, and he pulls with a force of 75 N.

a. What is the normal force on the luggage cart?

b. What force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground?

c. How does your answer in part (b) change as the angle increases?

Answers

a)The normal force on the luggage cart will be 305.85 N

b)The force would Tony needs to apply at a 30° angle to pull the luggage cart willl be 375 N.

What is the friction force?

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and acceleration. Mathematically aion in the different components and balancing the equation gets.Components in the x-direction.

Given data;

The angle of pulling with horizontal. =  30°

Mass of luggage cart=35 kg

Pulling force= 75 N

The force in the y-direction;

N+Fsin30° = mg

N+75 sin 30° = 35 × 9.81

N=305.85 N

The force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground;

N-mg=Fsin30

Fsin30=75 sin 30

Fsin30=375 N

Hence the normal force on the luggage cart and force would Tony need to apply at a 30° angle to pull the luggage cart willl be 305.85 N and 375 N.

To learn more about the friction force refer to the link;

https://brainly.com/question/1714663

#SPJ1

Select the correct answer.
Jack lives in a society where he has almost no political power. Governmental institutions handle all political, social, and economic affairs.
Which political system is this?
OA. totalitarianism
B. monarchism
C. democracy
D. chiefdom

Answers

Monarchy!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:A or totalitarianism

Explanation: Totalitarianism is an authoritarian form of government in which the ruling party recognizes no limitations whatsoever on its power, including in its citizens' lives or rights

Some characteristics of totalitarianism:

Rule by a single party.

Total control of the military.

Total control over means of communication (such as newspapers, propaganda, etc…)

Police control with the use of terror as a control tactic.

Control of the economy.

how do the interiors of jupiter and saturn differ? (select all that apply.)

Answers

The interior part of Jupiter and Saturn are different from each other due to difference of core and magnetic field.

How do the interiors of Jupiter and Saturn differ?

The interiors of Jupiter and Saturn differ from one another because Jupiter has a larger metallic hydrogen core as compared to Saturn. It has stronger magnetic field as compared to Saturn.

So we can conclude that the interior part of Jupiter and Saturn are different from each other due to difference of core and magnetic field.

Learn more about Jupiter here: https://brainly.com/question/3522722

#SPJ11

Please, please help i will give 50 points to someone who will help me get this correct!!!!!

Answers

can you write the question because i cant see it

PLEASE HELP
Identify and describe at least (3) physical science concepts to help with blackout.


Answers

Physics science in blackout involves the transmission of electrical impulses, neurotransmitter signaling and loss of coordination (body movements).

What is blackout?

The expression 'blackout' refers to the loss of memory remembers of one person due to the effects of alcohol.

During this process, a person may lose his/her ability to move due to failure in the transmission of electrical impulses and neurotransmitter signaling.

In conclusion, physics science in blackout involves the transmission of electrical impulses, neurotransmitter signaling and loss of coordination (body movements).

Learn more about blackout here:

https://brainly.com/question/10462033

#SPJ1

Two liquids A and B of relative densities 0.7 and 0.4 respectively are mixed with water, kl. How will the mixture. arrangement occur in a given container?

Answers

The liquid A is present lower in the container as compared to liquid B due to more weight.

How will the mixture. arrangement occur in a given container?

If two liquids A and B of relative densities 0.7 and 0.4 respectively then the lower density liquid remain at the top and higher density solution which is liquid A remains lower in the container because higher density solution has more weight.

So we can conclude that the liquid A is present lower in the container as compared to liquid B due to more weight.

Learn more about density here: https://brainly.com/question/1354972

#SPJ1

3. A body accelerates constantly at 4m/s² from rest for a distance of 60m. a) How long did it take to reach a distance of 60m? [2] b) Calculate the velocity reached.​

Answers

Answer:

will you mark brainliest.

Where is UTC the local time?

Answers

UTC is generally adopted as the local time at Prime Meridian (PM).

What is UTC?

UTC is an abbreviation for Coordinated Universal Time and it can be defined as a local time standard by which all clocks, time and time zones are regulated around the world.

This ultimately implies that, Coordinated Universal Time (UTC) is generally adopted as the local time at Prime Meridian (PM) because it nominally reflects mean solar time.

Read more on UTC here: https://brainly.com/question/14333785

#SPJ12

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. In working this problem, assume the value of "g" to be 9.8 m/s2 with two (2) significant digits unless otherwise stated. Calculate the increase in potential energy of a 60.0-kg man who climbs a ladder 10.0 meters high.
5880
600
58,800

Answers

The increase in potential energy of a 60.0-kg man who climbs a ladder 10.0 meters high is 5,880 J.

Increase in the potential energy of the man

The increase in the potential energy of the man is calculated as follows;

P.E = mgh

where;

m is mass of the manh is height attained by the mang is acceleration due to gravity

P.E = 60 x 9.8 x 10

P.E = 5,880 J

Thus, the increase in potential energy of a 60.0-kg man who climbs a ladder 10.0 meters high is 5,880 J.

Learn more about potential energy here: https://brainly.com/question/1242059

#SPJ1

Questions: 1. A table of weight 500N has four legs covering a total area of 0.5m². Calculate the pressure applied by the table on the ground

2. A man with a mass of 50kg, is standing on the ground. His two feet cover an area of 0.01m². calculate the pressure exerted by his two feet

3. An elephant has a weight of 40000N and her feet cover a total area of 0.5m². A woman weighs 600N and area of her heels in contact with the ground is 0.0075m². Who exerts the greatest pressure on the ground?

Answers

Answer:

shown below

Explanation:

1) P = F/A

P = 500 / 0.5

P = 1000N/m²

2) W = mg

W = 50 x 9.8

W = 490

P = F/A

P = 490 / 0.01

P = 49000N/m²

3) P = F/A

For E:

P = 40000 / 0.5

P = 80000N/m²

For W:

P = 600 / 0.0075

P = 80000N/m²

They're exerting the same amount of pressure on the ground

Find the mass of a sample of water if its temperature dropped 24.8 °C when it lost 870 J of
heat. (Remember that specific heat capacity of water 4200 J/kg °C)

Answers

Answer:

8.35 ×[tex]10^{-3}[/tex] kg

Explanation:

Remember the formula for heat:

[tex]Q=mc\Delta T[/tex]

You just need to solve for m, doing so you're left with:

[tex]m=\dfrac{Q}{c\Delta T}[/tex]

Replace the variables with numbers and that's it.

The mass of a sample of water is 0.841 kg.

What is specific heat?

Specific heat is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or Kelvin). It is a characteristic property of a substance that reflects its ability to store and release thermal energy.

Different substances have different specific heat capacities, depending on their chemical composition and physical properties. For example, water has a high specific heat capacity of 4,200 joules per kilogram per degree Celsius (J/kg°C), which means that it takes a large amount of heat energy to raise the temperature of water by one degree Celsius. In contrast, metals such as copper and aluminum have much lower specific heat capacities, which means that they heat up and cool down more quickly than water when subjected to the same amount of heat energy.

The specific heat of a substance can be measured experimentally using calorimetry, which involves measuring the amount of heat energy absorbed or released by a substance as it undergoes a change in temperature. The specific heat of a substance is an important parameter in many fields of science and engineering, including thermodynamics, materials science, and environmental science.

Here in the Question,

We know the  formula:

Q = mcΔT

where:

Q = amount of heat lost by the sample of water, which is -870 J (negative because heat is lost)

m = mass of the sample of water, which is what we need to find

c = specific heat capacity of water, which is 4200 J/kg °C

ΔT = change in temperature, which is -24.8 °C (negative because temperature dropped)

Substituting the values, we get:

-870 J = m(4200 J/kg °C)(-24.8 °C)

Simplifying, we get:

m = -870 J / (4200 J/kg °C × -24.8 °C)

m = 0.841 kg

Therefore, the mass of the sample of water is 0.841 kg.

To learn about latent heat click:

https://brainly.com/question/30762921

#SPJ2

sound travels through a ​

Answers

Answer:

A.3.64 m

Explanation:

Because

v=(fλ)(1382)=(380)λλ=3.637m~3.64m

where ,v=velocity

f=frequency

λ=wave length

Answer:

3.64

Explanation:

the formula is Already provided which is Velocity(m/s)= frequency (HZ) × wavelength

making wavelength stand alone

wavelength= velocity/ frequency

wavelength= 1382/380

wavelength= 3.64

Other Questions
Software that functions as an electronic version of a filing cabinet? The graph shows the function f(x).On a coordinate plane, a cube root function goes through (8, 2), has an inflection point at (0, negative 1), and goes through (8, negative 3).Which equation represents f(x)?f(x) = Negative RootIndex 3 StartRoot x EndRootf(x) = Negative RootIndex 3 StartRoot x minus 1 EndRootf(x) = Negative RootIndex 3 StartRoot negative x EndRoot minus 1f(x) = Negative RootIndex 3 StartRoot negative x EndRoot in which area of the galaxy would you find stars with fairly circular orbits about the galactic center? Please help!!! Thanks so much Which expression could help you find the distancebetween (10, 4) and (-6, 4)?O [10] +1-41O 1101 +141O 1-61 +141O |10| +-61 Clara y Juan ______en San Jos , Costa Rica .a)viveb)vivimosc)vivend)vivo What is 2/5 divided by 4/7 equal too _______ uses a rigid or flexible scope, which is inserted through the urethra and advanced into the renal pelvis and ureter. - REARRANGE EQUATIONS PLEASE HELP ITS DUE IN TOMORROW In The Code Book, what evidence does the author primarily use to support his claim that Zimmermann was the first to make a simple encryption product?factsquotesstatisticshypotheticals find the area of the shaded portion in each of the following which part of the body contains enyzmes that break down protein Hydrogen fusion in the Sun requires a temperature (in Kelvin) of Group of answer choices any temperature, as long as gravity is strong enough. millions of degrees. billions of degrees. thousands of degrees. Six 20 watt, 12-volt luminaires (lighting fixtures) are supplied from a small, 12-volt transformer that is 60 feet away from the fixtures. the wire used is 14 awg. what is the voltage applied to the fixtures? use k = 11.6. Simplify 14(123)2+13 What is the density of an 84.7g sample of an unknown substance if the sample occupies 49.6 cm^3? james brewer purchased 100 shares of stock for $73 a share. james also paid a $60 commission. what was the total purchase price for this transaction? what does ivf stand for and sexual intercom The scatter plot shows the height of an alfalfa plant over a period of time. Click on the table that best matches the data in the scatter plot.