Frank and Lisa are analyzing the chart, which shows the speed at which light travels through different media. Frank says that light travels through diamond with the greatest frequency. Lisa says that light travels through air with the greatest frequency. Which best describes the accuracy of these statements? a.Frank is correct because light travels through diamond at the slowest speed, and speed and frequency have an inverse relationship. b.Lisa is correct because light travels through air at the fastest speed, and speed and frequency have a direct relationship. c.Neither person is correct because light does not change frequency when it travels through different media. d. Both people are correct because light has both an inverse and a direct relationship with frequency, depending on the media.

Answers

Answer 1
The correct answer is
c) Neither person is correct because light does not change frequency when it travels through different media

In fact, light changes both wavelength and speed when it travels through different media, but the frequency remains the same.
Answer 2

Neither person is correct because light does not change frequency when it travels through different media.


Related Questions

A person weighing 0.70 kn rides in an elevator that has an upward acceleration of 1.5 m/s2. what is the magnitude of the normal force of the elevator's floor on the person?

Answers

First of all, we can find the mass of the person, since we know his weight W:
[tex]W=mg=0.70 kN=700 N[/tex]
And so
[tex]m= \frac{W}{g}= \frac{700 N}{9.81 m/s^2}=71.4 kg [/tex]

We know for Newton's second law that the resultant of the forces acting on the person must be equal to the product between the mass and the acceleration a of the person itself:
[tex]\sum F = ma[/tex]
There are only two forces acting on the person: his weight W (downward) and the vincular reaction Rv of the floor against the body (upward). So we can rewrite the previous equation as
[tex]R_v -W = ma[/tex]
We know the acceleration of the system, [tex]a=1.5 m/s^2[/tex] (upward, so with same sign of Rv), so we can solve to find the value of Rv, the normal force exerted by the elevator's floor on the person:
[tex]R_v = ma+W=(71.4 kg)(1.5 m/s^2)+700 N =807N[/tex]
Final answer:

The magnitude of the normal force of the elevator's floor on the person, given the person weighing 0.70 KN and the elevator accelerating upward at 1.5 m/s², is approximately 800 N.

Explanation:

This problem falls under the domain of Physics, specifically involving Newton's laws and the concept of the normal force within the context of elevator motion. To address the scenario of a person weighing 0.70 KN riding in an elevator that is accelerating upward at 1.5 m/s2, we need to understand the person's experienced force, otherwise known as normal force.

The normal force can be calculated using Newton's Second Law, F=ma, and knowing that the normal force equals the weight plus the product of the mass and acceleration when the elevator is moving upwards. In this case, the person's weight on Earth is equal to the force of gravity on them; with gravity being roughly 9.8 m/s2, the person's mass (m) would be their weight (w) divided by gravity (g), giving m = 0.70 KN / 9.8 m/s2 ≈ 71.4 kg.

The normal force (Fn) on upwards acceleration is given by Fn = m*(g+a), where a is the acceleration of the elevator. Substituting the given figures for m, g, and a we find Fn = 71.4 kg * (9.8 m/s2 + 1.5 m/s2) =~ 800 N (rounded to the nearest integer). Therefore, the magnitude of the normal force of the elevator's floor on the person is about 800 N.

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Which statement is true?Select one of the options below as your answer: A. Gas atoms subjected to electricity emit bright lines. B. Gas atoms absorb white light and emit a continuous spectrum of light. C. Gas atoms under high pressure emit dark lines against a continuous spectrum. D. Gas atoms heated to a high temperature emit white light. E. Gas atoms subjected to electricity do not emit a spectrum,

Answers

D. Gas atoms heated at high temperature emit white light. This happens when the atoms and molecules that contain a hot gas emit a certain light with wavelengths that produce a white light and bright lines. Light has a continuous spectrum that passes from one color to another without interruption.
The answer is A. Gas atoms subjected to electricity emit bright lines of light. This shows why particles behave like a way .This is the reason why we see the lightning's color. Lightning comes from the static energy and it interacts with the gas atoms.

Why does gravity pull things with mass toward it?

Answers

All objects have mass which attach to each other.

Identify five main components of the atmosphere

Answers

Nitrogen,Oxygen, Argon,Carbon dioxide,and water vapor are the five main components of the atmosphere.

Two charged parallel plates are 0.25 meters away from each other. The field between the plates is 600 . What is the electric potential difference?

Answers

E=V/d
V= Ed= 600×0.25= 150v

Answer:

150

Explanation:

edg 2022, electric potential difference assignment (slide 4/9)

At which of the following angles will the sunlight received at a location on Earth fall over the smallest area? 80° 65° 40° 10°

Answers

Answer: D. 10 degree angle

All places on Earth received sunlight but in different angles. The smallest area, which is the north of the Arctic Circle receive sunlight at a 10 degree angle because of the tilted axis of rotation. Usually, the sun’s rays are the most intense at the equator and the least intense at the poles as Earth revolves around the sun.

 

Answer:

The angle that will fall over the smallest area is 10

Explanation:

What is one property of a wave that determines how much it will diffract when it encounters an obstacle?
-speed
-amplitude
-polarization
-wavelength

Suppose two waves collide, and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?
-diffraction
-destructive interfernce
-standing wave formation
-constructive interfernce

The formation of a standing wave requires
-the traveling of a wave for a long distance
-constructive interference between two waves of slightly different frequencies
-that refraction and diffraction occur at the same time in a wave
-interference between incoming and reflected waves

Answers

1) D  -wave length 
2) B-destructive interference 
3)D -interference between incoming and reflective waves

Power can be expressed
1. in joules per watt, or in newtons per second
2. in joules per second, or in watts
3. in joules, or in newton-meters

Answers

By definition Power is energy per second.  As units the Watt, and a Watt is joules/second (2)

Power in physics is the rate at which energy is transferred, correctly measured in joules per second or watts. Option 2

Power in physics is defined as the rate at which work is done or the rate at which energy is transferred. This rate is typically measured in joules per second (J/s), which is also known as a watt (W). To clarify the options provided in the question, power cannot be correctly expressed in joules per watt or newtons per second as these do not represent the rate of energy transfer.

Instead, power is correctly expressed in joules per second, which is equivalent to watts. For instance, a device like a light bulb that uses electrical energy to produce light and heat will have its power consumption rated in watts. The higher the wattage, the more power it consumes over a given period of time.

Additionally, power is sometimes measured in units such as the horsepower (hp), where 1 hp equals 746 watts. Furthermore, it is important to realize that terms like kilowatt-hour (kWh) are units of energy, not power. For instance, a 2000-watt iron would use 2 kWh of energy over one hour, which is equal to 2 x 3.6 million joules. Option 2

The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of positive charge is often called ____ model.

Answers

Answer: raisin pudding model or plum pudding model

This atomic model was developed in 1904 by the British scientist J.J. Thomson, from his discovery of the existence of the electron in 1897.

Taking into consideration that at that time there was still no evidence of the atom nucleus, Thomson thought the electrons (with negative charge) were immersed in a substance (the atom) of positive charge that counteracted the negative charge of the electrons. Just like the raisins embedded in a pudding or bread.

That is why this model was called the raisin pudding atomic model

What is the transfer of energy to an object using a force that causes the object to move in the direction of the force?
a. movement
b. power
c. work
d. force?

Answers

C. Work
[tex]w = f \times d[/tex]
*Work is measured in Joules.

The ease with which a memory can be retrieved is influenced by all of the following EXCEPT

How well the person encodes the information
The importance of the information
The person's belief in the information
How well the person stores the information,

Answers

Hi! I just took this lesson, the answer is: "The person's belief in the information"

I hope this helps!

An ammeter can measure current upto 500mA. There are 20 equal division between 0 and 100mA mark on its scale. During an experiment to determine the equivalent resistance of the two resisters joined in parallel a student observes ammeter’s pointer at 3rd graduation mark after zero when the key is off and the pointer at the 17th graduation mark after 200mA when the key is inserted into the plug.The correct value of the current flowing in the circuit is

Answers

When the key is off there should be no current in the circuit. 
Our ammeter still measures some current, and this is called hysteresis error. This means that this particular ammeter is going to add some amount of current to any current measured. In order to compensate for this error, we simply we deduct it from all measurements.
Each mark on the ammeter is worth:
[tex]m=\frac{100mA}{20}=5mA[/tex]
This means that our error is:
[tex]e_r=3\cdot m=15mA[/tex]
When the circuit is closed we measure:
[tex]I_{er}=200mA+17\cdot m=285mA[/tex]
This is current with the error, real current in the circuit is:
[tex]I=I_{er}-e_r=285-15=270mA[/tex]


Work can _____ energy between objects and can cause a change in the form of energy.

A. Transfer
B. Change
C. Increase
D. Decrease

Answers

Answer:

Work can transfer energy between objects and can cause a change in the form of energy.

Explanation:

The best explanation can be done with an example.Consider an apple of mass m falling from a tree. Initially, the apple is at rest on the tree, at a certain height h above the ground, so it has a form of energy called gravitational potential energy, equal to: where g is the acceleration due to gravity.As the apple falls, the force of gravity acts on it, and so this force does work on the apple. As a result, the potential energy of the apple is converted into another form of energy, kinetic energy, which is the energy due to the motion of the apple: where v is the speed of the apple.Consider another example: a man pushing a box along the floor with a force F. The man is doing work on the box, and this work is equal towhere d is the displacement of the box. As a result of this work, some of the chemical energy contained in the muscles of the man is transferred into the box and converted to kinetic energy of the box, which is put in motion and it gains a certain speed v. In particular, if there are no frictional forces involved, the work done by the man is equal to the kinetic energy gained by the box.

Immediately above the Sun's photosphere is the _______, which is the Sun's lower atmosphere
Immediately above the Sun's photosphere is the _______, which is the Sun's lower atmosphere.
A.
chromosphere
B.
solar wind
C.
corona
D.
core

Answers

Right answer: chromosphere

The chromosphere is a thin layer of the atmosphere of the sun (or any other star) above the photosphere and below the corona. It consists mainly of hydrogen and helium.

This layer is very faint and reddish when it becomes visible, for a few seconds, at the beginning and end of a Solar  eclipse and its appearance is not homogeneous.

Answer:

chromosphere

Explanation:

I got it right on study island

The buoyant force on an object fully submerged in a liquid depends on (select all that apply)
Answer

1. the object’s mass.

2. the object’s volume.

3. the density of the liquid.

4. the mass of the liquid

Answers

2. The object's volume.
 3. The density of the liquid.  
Remember what the buoyant force is. It's the lifting force caused by the displacement of a fluid. I'm using the word fluid because it can be either a liquid or gas. For instance a helium balloon floats due to the buoyant force exceeding the mass of the balloon. So let's look at the options and see what's correct. 
 1. Object's mass
 * This doesn't affect the buoyant force directly. It can have an effect if the object's mass is lower than the buoyant force being exerted. Think of a boat as an example. The boat is floating on the top of the water. If cargo is loaded into the boat, the boat sinks further into the water until the increased buoyant force matches the increased mass of the boat. But if the density of the object exceeds the density of the fluid, then increasing the mass of the object will not affect the buoyant force. So this is a bad choice. 
 2. The object's volume.
 * Yes, this directly affects the buoyant force. So this is a good choice. 
 3. The density of the liquid.
 * Yes, this directly affects the buoyant force. You can drop a piece of iron into water and it will sink. You could also drop that same piece of iron into mercury and it will float. The reason is that mercury has a much higher density than water. So this is a good choice. 
 4. Mass of the liquid
 * No. Do not mistake mass for density. As a mental exercise, imagine the buoyant force on a small piece of metal dropped into a swimming pool. Now imagine the buoyant force on that same piece of metal dropped into a lake. In both cases, the buoyant force is the same, yet the lake has a far greater mass of water than the swimming pool. So this is a bad choice.

The buoyant force on an object fully submerged in a liquid depends on the object's volume.and the density of the liquid.  

What is  buoyant force ?

Buoyant force also known as upthrust, is an upward force exerted by a fluid that resists the weight of a partly or completely submerged object.

The weight of the overlying fluid causes pressure to rise with depth in a column of fluid.

The buoyant force on an object fully submerged in a liquid depends on the object's volume.and the density of the liquid.  

Hence option 1 and 3 is correct .

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Vector A??? has a magnitude of 2.00 m and vector B??? has a magnitude of 5.00 m. If the direction of each vector is unknown, what is the largest possible value for the magnitude of A??? ???B??? ?

Answers

If the two vectors decide to work together, practice teamwork
and cooperation, and both push in exactly the same direction,
then they can team up to make a single vector of (2m + 5m) = 7m .
Final answer:

The largest possible magnitude of the two vectors A and B when added is the sum of their individual magnitudes, in this case, 7.00m. This occurs when the vectors are arranged in the same direction.

Explanation:

In the field of Physics, particularly when dealing with vectors, the magnitude of the sum of two vectors (like A + B) can be at its biggest when the vectors are aligned in the same direction. In this case, the magnitudes, or lengths, of the vectors simply add up.

Here, you have one vector A, which has a magnitude of 2.00m, and another vector B, which has a magnitude of 5.00m. The largest possible magnitude of these two vectors when added (denoted by A + B) would be 2.00m + 5.00m = 7.00m. This happens when vectors A and B are in the same direction.

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explain how a diode is like a one way street

Answers

The diode is like a one-way street because it allows current to flow to only one direction in the circuit.

In fact, a diode consists of a p-n junction, with a n-type region with excess of electrons and a p-type region with excess of holes. Both ends are connected to two terminals of a battery, so a voltage difference can be applied across the junction.

When no voltage is applied, electrons from the n-region combine with the holes from the p-region in the area near the junction, creating the so-called depleting region, which acts as an insulating area.

To get rid of this depleting area, the n-type region must be connected to the negative terminal of the battery while the p-type region to the positive terminal of the battery. This way, electrons from the n-region are repelled from the negative terminal and start to flow towards the positive terminal (and the holes do the same in the opposite direction), creating a net current flowing through the depletion region. Instead, when the n-type region is connected to the positive terminal of the battery, the electrons are attracted by that terminal, so they do not flow through the depletion region (and same for the holes in the p-region) and so there is no net current across the junction. Therefore, current in a diode flows only in one direction.

A box of mass 3.0 kg is accelerated from rest across a floor at a rate of 3.0 m/s2 for 4.0 s . what is the net work

Answers

Work done is given by multiplying force and distance.
Therefore; W = Force × distance
  but from the second newton's law of motion F=ma
Therefore; W = (ma) × d
Using; V= U + at
 V = 0 + (3×4)
 V = 12 m/s
 But d = (V+U)/2 (t)
        d = 12/2 (4)
           = 24 M
Hence;  W = ( 3 ×3 )× 24
                  = 216 J

What is the current in a series circuit with a resistance of 30 ohms and a potential difference of 120 volts?

Answers

0.25A....................

you can feel the heat waves from small electric heater on your hands and face even though the heater is on the other side of the room this is an example of

Answers

radiation
hope this helps

Final answer:

Feeling the heat from a heater at a distance is an example of heat transfer by radiation, where electromagnetic waves emitted by the heater are absorbed by the skin, causing a warming sensation.

Explanation:

Feeling the heat waves from a small electric heater on your hands and face, even though the heater is on the other side of the room, is an example of heat transfer by radiation. This occurs when a hot body like a heater emits electromagnetic waves that travel through the space and are absorbed by your skin, warming you without the need for a medium. This type of heat transfer is the same that occurs when we feel the warmth from the Sun or when an oven warms us as we walk by.

PLEASE HELP ME


In a vasectomy, which part of the anatomy is cut or tied off?

A. testes
B. vas deferens
C. urethra
D. seminal vesicles

Answers

The answer is B. Vas deferens.

The Vas deferens is a tube that carries the sperm from your testes to the urethra and out the body. A vasectomy is a form of birth control where the pathway of sperm is blocked through cutting or tying off the vas deferens. The word Vasectomy comes from the term Vas deferens.

Answer: Vas deference

Explanation: This is a method of contraception in uses a small surgical procedure. This method is a permanent method of contraception.

During this procedure, male vas deference are cut and tied together or we can say it is sealed to prevent the path of sperm from getting into the urethra and in this way it prevents fertilization of a females egg during the sexual intercourse.

Electric fields exist at a distance from two [blank] spheres.

a) magnetic

b) neutral

c)charged

Answers

C - charged

To have an electric field you must have charged particles

Answer:

c)charged

Explanation:

A mixing blade on a food processor extends out 3 inches from its center. if the blade is turning at 600 revolutions per minute, what is the linear velocity of the tip of the blade in feet per minute? (round your answer to the nearest whole number.)

Answers

First let's convert everything into SI units.
The length of the blade is 3 inches. Keeping in mind that 1 inc=0.025 m, we have
[tex]L=3 in \cdot 0.025 \frac{m}{inc} =0.075 m[/tex]
The angular speed is 600 revolutions per minute. Keeping in mind that [tex]1 rev=2 \pi rad[/tex] and [tex]1 min=60 s[/tex], the angular speed becomes
[tex]\omega = 600 \frac{rev}{min} \frac{2 \pi rad/rev}{60 s/min}=62.8 rad/s [/tex]

And so, the linear velocity of the edge of the blade is equal to
[tex]v=\omega L=(62.8rad/s)(0.075 m)=47 m/s[/tex]

Answer:

The linear  velocity of the tip of the blade is 940.94 ft/min.

Explanation:

It is given that,

A mixing blade on a food processor extends out 3 inches from its center, r = 3 inches = 0.0762 meters

Angular speed of the blade, [tex]\omega=600\ rev/minute=62.83\ rad/s[/tex]  

Let v is the linear velocity of the tip of the blade. The relation between the angular velocity and the linear velocity is given by :

[tex]v=r\times \omega[/tex]

[tex]v=0.0762\times 62.83[/tex]    

v = 4.78 m/s

or

Since, 1 m/s = 196.85 ft/min

4.78 m/s = 940.94 ft/min

So, the linear  velocity of the tip of the blade is 940.94 ft/min. Hence, this is the required solution.          

For precipitation to form, cloud droplets must grow in volume by roughly __________ times.

Answers

For precipitation to form, cloud droplets must grow in volume by roughly one million times.

Hope I helped :)

The correct answer is by roughly one million times.  

Any product of the condensation of atmospheric water vapor, which falls under gravity is known as precipitation. The main forms of precipitation are rain, drizzle, snow, sleet, and others.  

All the precipitation give rise to clouds and the clouds are produced when water vapor in the atmosphere condenses and cools. With the condensation of water vapor, the formation of water droplets takes place, and if the formation of clouds takes place within or is moved into the part of the atmosphere, which is below freezing then the droplets turn into ice crystals.  

In order to form precipitation, the cloud droplets must grow in volume by roughly one million times.  

A tow truck exerts a force of 3000 n on a car, accelerating it at 2 meters per second per second. what is the mass of the car?

Answers

If the force is 3,000 N and the acceleration is 2 m/s/s. The mass of the car is 1,500 grams (or whatever unit of mass or weight is used in the answer- pounds, kilograms e.t.c.).

The weight of a synthetic ball varies directly with the cube of its radius. a ball with a radius of 2 inches weighs 5.605.60 pounds. find the weight of a ball of the same material with a​ 3-inch radius.

Answers

The weight of the ball m is directly proportional to the cube of the radius, [tex]r^3[/tex]. This means that the ratio between the weight of the ball with radius 3-in and 2-in should be equal to the ratio between the cubes of the two radii:
[tex] \frac{m_3}{m_2}= \frac{(3 in)^3}{(2 in)^3} [/tex]
So we can find the weight of the ball when its radius is 3 inches:
[tex]m_3 = m_2 \frac{(3 in)^3}{(2 in)^3}= (5605.60 p) \frac{3^3}{2^3}=18919 pounds [/tex]

Which consumes more energy, a 1.3 kw hair dryer used for 10 min or a 10 w night light left on for 24 hr?

Answers

night light consumes more energy
energy consumed by hair dryer= 1300w x 60 x 10  =780000
energy consumed by night light = 10 x 24 x 60 x60 =864000

The 1.3 kW hair dryer consumes less energy than the 10 W night light. Calculations show that the hair dryer uses 0.2167 kWh, while the night light uses 0.24 kWh.

The 1.3 kW hair dryer used for 10 minutes consumes more energy compared to the 10 W night light left on for 24 hours. To calculate energy consumption, we use the formula: Energy = Power x Time. For the hair dryer: Energy = 1.3 kW x (10 min / 60 min) = 0.2167 kWh. For the night light: Energy = 10 W x 24 hours = 0.24 kWh. Therefore, the hair dryer consumes less energy.

How do elements form?
A) Through fusion in stars and supernova
B)Through the cooling of molten lava
C)Through the evaporation of seawater
D)Through chemical reactions

Answers

the answer is A. through fusion in stars and supernova.

Answer:

A) Through fusion in stars and supernova

Explanation:

took the test and got it right

If the cross-section of a wire of fixed length is doubled, how does the resistance of that wire change? (this is for studying for my semester exam. I got the question wrong on one of my chapter tests so I'm trying to find out what the correct answer was)

A. Halved
B. Doubled (I know it's NOT this cause that was the wrong one)
C. Unchanged
D. Quadrupled

Answers

If the cross-section of a wire of fixed length is doubled,  the resistance of that wire change into doubled.We know that the total length of the wires will affect the amount of resistance.  The longer the wire, the more resistance that there will be so the answer is doubled.

Ohm’s law is I = V ÷ R. What is the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance? The current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is (blank) amps.

Answers

current = voltage \ resistance
x= 3 \ 1
x = 3 amps

Final answer:

Using Ohm's Law, which states I = V / R, the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is calculated to be 3.0 amperes.

Explanation:

Calculating Current with Ohm's Law

Ohm's Law describes the relationship between current (I), voltage (V), and resistance (R) in an electrical circuit, stating that I = V / R. To calculate the current in a circuit with a 3.0-volt battery and 1.0 ohm of resistance, you would use the formula I = V / R. Plugging the values into the formula gives us I = 3.0 V / 1.0 Ω, which simplifies to I = 3.0 A. Therefore, the current of the circuit would be 3.0 amperes.

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In your own words, explain how the changes in the density of ocean water causes movement of ocean water from one place to another. The city of San Francisco reported more missing dogs the week before a massive earthquake than any other week of the year. Therefore, this is factual evidence that dogs can sense impending danger T or F A veterinary clinic plans to build four identical dog kennels along the side of its building using 210 feet of fencing. (See the picture.) What should be the dimensions of each kennel to maximize the enclosed area? (Note: No fencing is needed along the side of the building.) what is the molecular formula of compound x? What three criteria must a psychological test meet before it can be widely used? Which of these are elements of an epic poems structure and style? Check all that apply. the use of poetic verse throughout the epic a narrative voice that tells the story the use of prose in some passages short descriptions elevated, or eloquent, style compelling speeches the use of poetic verse throughout the epic a narrative voice that tells the story the use of prose in some passages short descriptions elevated, or eloquent, style compelling speeches What is the mean absolute deviation for the data set? {20, 24, 12, 44, 68} 16.81 17.04 17.52 17.92 Find the conductivity of a conduit with a cross-sectional area of 0.40 cm2 and a length of 20.0 cm if its conductance G is 0.080 units. Cul no usas en una ensalada de frutas?A- ManzanasB- galletasC- pltanosD- fresas What are the equations of the horizontal asymptotes of y = (4e^x+7)/(e^x-1) in the xy plane? MEDAL AND FAN FOR FIRST ANSWER!!!!Which of the following materials is a conductor of electric current? A.a plastic game piece B.a wooden spoon C.a copper penny (I think its this one) D.a glass window How did president truman react when north korean troops crossed into south korea? What is the area of a sector with a central angle of 35 radians and a diameter of 21.2 cm? Use 3.14 for and round your final answer to the nearest hundredth. Enter your answer as a decimal in the box. Can somebody help me restate my thesis so that it sounds more developed. So my thesis is Dropping th atomic bomb on Japan was necessary because the U.S. provided them with multiple warnings and it enabled the war in the Pacific to come to a swift end. I want to rephrase that to make it sound more sophisticated any ideas on how I should phrase it ? Type a personality ist to ___ as type b personality is to ___ _______ is/are associated with strong emotion to trigger an emotional response from a reader. A. Inferences B. Opinions C. Logic D. Loaded words How are mitosis and meiosis similar A.) they both produce gametes B.) they both involve duplicating chromosomes C.) they both produce retreads D.) they both increase the chromosome number Identify an instance of satire in "The 1,000,000 Bank-Note" that hasn't yet been discussed in this lesson and explain its meaning in the text. What would be the magnification of a specimen viewed with a compound light microscope that has an objective power 40 X in ocular lens power of 10 X joey's little sister must take four steps for every three steps joey takes. suppose one step of joey's covers one foot. how many feet would his sister