Chemicals cannot be used to divide atoms. Even though they are made up of protons, neutrons, and electrons, an atom is the fundamental chemical unit of matter. Atoms can disintegrate as a result of nuclear processes like a fission and radioactive decay.
A negative electrical charge accompanies every electron. There is a positive electrical charge on each proton. A proton's charge and an electron's charge have the same magnitude but different signs. Protons and electrons are drawn to one another by electrical forces. Protons and protons, as well as electrons and electrons, repel one another.
Electrical neutrality applies to each neutron. In other words, neutrons don't have a charge and aren't drawn to protons or electrons electrically.
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a skateborder traviling at 7.0m/s/s rolls to a stop at the top of a ramp in 3.0 seconds what is the skateborder's acceleration?
Answer:
-2.33 m/s^2
Explanation:
initial speed u = 7m/s
final speed v= 3s
acceleration a = (v-u)/t
a= -7/3= -2.33 meter per second square.
Your friend moved from chicago to buenos aires, argentina and said that she has observed constellations that cannot be seen in chicago. could this be true? group of answer choices
Yes, if my friend moved from Chicago to Buenos Aires, Argentina and said that she has observed constellations that cannot be seen in Chicago, because, two stars in same constellation may be actually very far away from each other.
What are constellations?Constellations are the groups of stars. The constellations you can see at night depend on your location on the Earth and the time of year. Constellations were named after objects, animals, & people long ago. Astronomers today still use the constellations to name stars and meteor showers. A constellation is group of stars that looks like a particular shape in the sky and has been given a name. These stars are far away from the Earth and they are not connected to each other at all. Some stars in a constellation might be close while others are very much far away. But, if you were to draw lines in the sky between the stars like a dot-to-dot puzzle – and use lots of imagination – picture would look like an object, animal, or person.
Why constellation is so important?constellation, in astronomy, any of certain groupings of stars that were imagined—at least by those who named them—to form conspicuous configurations of the objects or creatures in the sky. Constellations are useful in assisting the astronomers and navigators to locate certain stars.
Certain constellations can only be seen in Northern Hemisphere but disappear in Southern Hemisphere, the vice-versa is true as well. The Earth is a globe because constellations appear to shift and disappear due to spherical curvature of the Earth.
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As volume is held constant and the temperature increases, how would the pressure be expected to change?
Gay Lussac's Law states that when a gas is held at a fixed volume, its pressure is exactly proportional to its Kelvin temperature. The molecules of a gas receive more energy when heated, causing them to move more quickly. This results in increased pressure and more impacts on the container's walls.
What do you understand by pressure?Pressure is the term used to describe the physical force exerted on an object. A perpendicular force is applied to the surfaces of the objects per unit area. F/A is the fundamental formula for pressure (Force per unit area)
This is based on the supposition that the force is applied perpendicular to the surface area. The pressure would rise proportionately if you exerted the same amount of force over a larger surface area. 5 Pa would be the force of 5 N applied over the same area of 1 square meter.
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In the system, kinetic energy from the moving water of the faucet turns the turbine. The __ energy of the spinning turbine generates __ energy which is transformed into __ energy that causes the temperature of the water to increase. The water then becomes steam and gives off more __ energy into the atmosphere.
In the system, kinetic energy from the moving water of the faucet turns the turbine. The Mechanical energy of the spinning turbine generates Electrical energy which is transformed into Thermal energy that causes the temperature of the water to increase. The water then becomes steam and gives off more Thermal energy into the atmosphere.
The mechanical energy spend on the turbine to spin would generate electrical energy. This electrical energy then converts the moving electric charge into thermal or heat energy. The heat would convert water to steam.
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A bare helium nucleus has two positive charges and a mass of 6.64 10-27 kg. Calculate its kinetic energy in joules at 5.00% of the speed of light.
The kinetic energy of the helium nucleus will be 4.98 x 10⁻¹³ J
Kinetic energy can be define as , that it is a form of energy that an object or a particle is cause of its motion. Its unit is joule i.e. j & it is given as,
K.E. = 1/2 mv²
where , m is mass of the particle and v is the velocity of the particle .
Energy can be expressed as, the ability to perform work. Energy can neither be created nor destroyed, but it can only be transformed from one form to another. The unit of energy is joule .
Mass of helium nucleus = m = 6.64 x 10⁻²⁷ kg
Speed of light = c = 3 x 10⁸ m/s
Speed of light at 5.00% = c = 5.00/100x 3 x 10⁸ m/s = 1.5 x 10⁷ m/s
The kinetic energy of the helium nucleus can be given as ,
K.E = ¹/₂mc²
K.E = ¹/₂ x (6.64 x 10⁻²⁷) x (1. 5 x 10⁷)²
K.E = 4.98 x 10⁻¹³ J
Therefore, the kinetic energy of the helium nucleus is 4.98 x 10⁻¹³ J
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Amazon delivery boxes are launched from a horizontal conveyor belt moving at a rate of 3 m/s into bins for shipping. If the surface of the conveyor belt is 1.4 m off the ground, what is the range of each Amazon box?
The range of each Amazon box is determined as 1.59 m.
Time of motion of the amazon box
The time of motion of the amazon box is calculated as follows;
h = vt + ¹/₂gt²
where;
v is initial vertical velocity = 0t is the time of motion of the amazon boxh is the height traveledh = ¹/₂gt²
t = √(2h/g)
t = √(2 x 1.4/9.8)
t = 0.53 second
Range of the amazon boxThe horizontal distance traveled by the amazon box is known as the range and it is calculated as follows;
R = Vₓt
where;
Vₓ is the horizontal speedt is the time of motionR = 3 m/s x 0.53 s
R = 1.59 m
Thus, the range of each Amazon box is determined as 1.59 m.
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What is the difference between a scalar and a vector? a scalar has whereas a vector has categorize the quantities based on whether they are scalars or vectors.
The difference between a scalar quantity and a vector quantity can be found below.
What is a scalar and vector quantity?A scalar quantity is a quantity that has magnitude but not direction.
On the other hand, a vector quantity is a quantity with both magnitude and direction.
Examples of scalar quantities are;
SpeedTemperature LengthTime MassExamples of vector quantities are;
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Distance versus time is plotted and a best-fit line is found to be y = 0.098 x 0.01y=0.098x 0.01. what are the units of the slope 0.098?
The unit of the slope is m/s
Given that y = 0.098x + 0.01
According to slope formula, y = mx + c
Slope, m = 0.098
Slope of the line is equal to the velocity of the object in a distance-time graph. Unit of velocity is m/s.
Therefore, the unit of the slope is m/s
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11. A proton is uniformly accelerated from rest to 80.0% of the speed of light in
18 hours, 6 minutes, 45 seconds. What is the acceleration of the proton?
The acceleration of the proton is 3681 m/s^2
What is the acceleration?The term acceleration has to do with the change in the speed of the body with time. We can see here that the proton started from rest and was accelerated to 80.0% of the speed of light in 18 hours, 6 minutes, 45 seconds.
Initial velocity of the proton = 0 m/s (from rest)
Final velocity of the proton = (0.8 * 3 * 10^8 m/s) = 2.4 * 10^8 m/s
Time taken = 18 hours, 6 minutes, 45 seconds or 65205 s
Acceleration = 2.4 * 10^8 m/s - 0 m/s/65205 s
= 3681 m/s^2
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Astronomers typically measure the color of stars at multiple wavelengths. the difference in the magnitude of the stars as measured in two parts of the spectrum is known as its:________
Astronomers typically use filters that exclusively transmit light from a specific narrow band of wavelengths to measure a star's apparent brightness in order to determine the precise color of a star (colors).
Around 0.001 magnitude of starlight may be measured with accuracy by photoelectric photometers. The method of surface photometry, which gauges apparent magnitude in magnitudes per square arcsecond, can also be applied to extended objects like planets, comets, nebulae, and galaxies. The varied hues are caused by the light's estimated blackbody radiation, which is more sensitive to the star's temperature than to the specifics of its composition. As a result, astronomers can gauge a star's surface temperature by observing its hue.
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Five particles are shot from the left into a region that contains a uniform electric field. The numbered lines show the paths taken by the five particles. A negatively charged particle with a charge –3q follows path 2 while it moves through this field. Do not consider any effects due to gravity. In which direction does the electric field point?.
Five particles are shot from the left into a region that contains a uniform electric field. A negatively charged particle with a charge –3q follows path 2 while it moves through this field. The electric field point towards the bottom of the page.
What are electric fields?An electric field is a physical field around a charged particle or object which has the ability to surround electrically charged particles and exerts force on all other charged particles that are present in the field.
This force exerted upon them is either attracting or repelling them. This electric field also refers to as the physical field for a system of charged particles.
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Identify the element(s) and standard(s) of critical thinking with corresponding essential question(s) relative to your perception of the ethical dilemma.
An ethical dilemma describes a conflict between two morally correct courses of action.
Being able to reason effectively and logically about what to believe or do is known as critical thinking. It comprises the capacity for independent and thoughtful thought. These are some examples of what someone with critical thinking abilities can do:
Recognize the logical relationships between concepts.Determine, create, and assess arguments.Find logical errors and common contradictions.Approach issues methodically.Determine the applicability and significance of concepts.Consider how one's own values and opinions are justified.The ability to think clearly and rationally is crucial whatever we choose to undertake. It should go without saying that critical thinking is crucial if you work in the fields of education, research, business, law, or management.
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Which has higher kinetic energy: a sled resting at the top of a hill or a sled sliding down the hill? a sled sliding down the hill a sled resting at the top of a hill
A sled sliding down the hill will have more Kinetic energy than a sled resting at the top of a hill.
We know that,
Kinetic Energy KE = [tex]1/2 mv^{2}[/tex]
A sled resting at the top of a hill will have zero velocity.
KE of a sled resting at the top of a hill = 0
Kinetic Energy is the energy of motion which is directly proportional to the velocity of the object.
Therefore Kinetic energy of a sled sliding down the hill is more than that of a sled resting at the top of a hill.
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Watch the animation and identify the correct conditions for forming a hydrogen bond.
When a hydrogen atom forms a covalent link with an N, O, or F atom, hydrogen bonding takes place.
Only a few substances that contain hydrogen can form a hydrogen bond.
The hydrogen bonds in the CH4 molecule are visible.
When a F atom and a hydrogen atom are covalently bound, the hydrogen atom gains a slight positive charge.
Covalent bonds and hydrogen bonds are interchangeable terms.
What is hydrogen bond?The interaction known as hydrogen bonding, which involves a hydrogen atom sandwiched between two other atoms with a high affinity for electrons, is stronger than van der Waals forces but weaker than ionic or covalent bonds. Atoms in separate molecules or distinct regions of the same molecule can form hydrogen bonds with one another. A hydrogen atom (FH, NH, or OH) is covalently bound to one of the pair's (the donor) typically fluorine, nitrogen, or oxygen atoms, with which it shares electrons unevenly. As a result of this high electron affinity, the hydrogen gains a little positive charge. The other atom in the pair, which is usually F, N, or O, has an unshared electron pair, giving it a little negative charge.
The donor atom efficiently transfers its hydrogen to the receiver atom by electrostatic attraction, creating a connection. Water (H2O) is liquid over a much wider temperature range than would be anticipated for a molecule of its size due to its extensive hydrogen bonding. Because it quickly forms hydrogen bonds with the solute, water is an excellent solvent for ionic compounds as well as many other types of solutes. A linear protein molecule's ability to fold into its functional configuration depends on the hydrogen bonds formed between the amino acids. The double-helix structure of DNA is essential for the transmission of genetic information. It is created by hydrogen bonds between nitrogenous bases in nucleotides on the two strands of DNA (guanine partners with cytosine, adenine couples with thymine).
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What is Issac Newton’s
Laws,
According to the first rule of motion, an object's motion will not alter unless there is a force acting on it.
According to the second law of motion, the amount of force exerted on an object is proportional to the product of the object's mass and its acceleration.
According to the third law, when two things interact with one other, the forces that they apply to each other are of equal magnitude but in opposing directions.
This is further explained below.
Who is Issac Newton?Generally, Isaac Newton, as he was formally known, was an English physicist and mathematician who was the leading light of the 17th century's Scientific Revolution.
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Answer:
look it up
Explanation:
For a fixed (constant) rate of heat transfer in one-direction a material with a very large thermal conductivity will have what relative size temperature gradient?
For a fixed (constant) rate of heat transfer in one-direction a material with a very large thermal conductivity will have small relative size temperature gradient.
What is thermal conductivity?
A material's capacity to conduct heat is measured by its thermal conductivity, or k [W/mK]. The rate of heat transfer through a unit thickness of material per unit area per unit temperature difference is known as the thermal conductivity.The thermal conductivity is measured by experiments and varies with temperature. When certain minerals become superconductors, their thermal conductivity dramatically changes at temperatures close to absolute zero. A substance that exhibits consistent qualities in all directions is said to be isotropic. Materials used as insulators primarily serve to block the flow of heat. Their thermal conductivity is low.Learn more about the Thermal conductivity with the help of the given link:
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What is the mass in kilogram of 680ml of a substance that has a density of 0.930?
Mass of substance is 0.6324 kg
Given:
volume = V = 680ml = 0.68 L
density = D = 0.930
To Find:
mass in kg
Solution: mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force.
Density = mass/volume
mass = Density x Volume = 0.93 x 680
Mass = 0.6324 kg
Hence, the mass of substance is 0.6324 kg
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A jetliner goes from rest to a takeoff speed of 183 mi/h in 36.1 s. what is the magnitude of its average acceleration?
A jetliner goes from rest to a takeoff speed of 183 mi/h in 36.1 s.
the magnitude of its average acceleration is 81.80
CalculationTake off speed of the jetliner = 183 mi/h
so time taken = 36.1s
average acceleration = change in velocity / time taken
= (183 x 1609.3)/ 3600
= 81.80 m/[tex]s^{2}[/tex]
What is average acceleration?The rate at which an object’s velocity changes is measured as its acceleration. Since it is a vector, speed and direction are also included. In the SI, acceleration is measured in meters per second squared (m s 2).
An object’s velocity is how quickly it is travelling in a specific direction. A vector, that is. In the SI, velocity is measured in meters per second (m s).
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An ion of aluminum has a charge of 3 . the ion contains 10 electrons. how many protons does a neutral atom of aluminum possess?
a. 3
b. 10
c. 13
d. 16
The correct toption is (C) 13
The neutral atom of aluminum possess 13 protons.
Aluminum, denoted by the letter Al, is a group 3 element on the periodic chart. Total weight is 27 kilos. Since the number of electrons and protons in a neutral atom are equal, an aluminum atom that is neutral or uncharged has 13 electrons, 13 protons, and 14 neutrons. Keep in mind that the product of protons and electrons determines mass.The solution to this is that a 3+ charge on an aluminum ion means that an aluminum atom has lost three electrons, or 13 electrons - 3 electrons = 10. An aluminum atom will consequently have 10 electrons because it has a +3 charge. The fact that an aluminum atom possesses 13 protons when it is in a neutral state is unaffected by this.Learn more about the quantum mechanics with the help of the given link:
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Which layer of the osi model ensures the data being sent from the sender is formatted correctly so it can be interpreted correctly by the recipient system?
The presentation layer is sometimes known as the syntax layer since it is in charge of ensuring that the data it either receives or transmits to other layers has the correct syntax. Data sent across the network is formatted and encrypted by the presentation layer.
What is meant by the presentation layer?The presentation layer, which is layer 6 in the seven-layer OSI model of computer networking, acts as a network's data translator. It is referred to as the syntactic layer at times.
The communication is given to the top layer in a defined format thanks to the presentation layer (Layer 6). It deals with the messages' syntax and meaning. Communication across disparate systems, encrypts messages from the user-dependent format to the common format and vice versa.
The presentation layer, which is located at Layer 6 of the Open Systems Interconnection (OSI) communications architecture, makes sure that all communications passing through it are in the right format for the destination application. In other words, from the application layer's point of view, it provides the data in a comprehensible format.
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20 drops of an essential oil have a mass of 407.7 mg (milligram) and a density of 0.875g/cm3. what is the volume occupied by the drops?
Volume occupied by the drops is 0.46 cm^3
Given:
no. of drops of oil = 20 drops
mass of 20 drops = 407.7 mg
Density of 20 drops = 0.875g/cm3
To Find:
Volume occupied by the drops
Solution:
Density is define as mass per unit volume
by using the formula we can find volume
Density = mass/volume
0.875 = 0.4077 gram/ volume
Volume = 0.4077 gram/0.875 = 0.46 cm^3
Hence, volume occupied by 20 oil drops is
0.46 cm^3
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An object is pulled northward with a force of 10 n and southward with a force of 15 n. the magnitude of the net force on the object is:________
a. 0 n.
b. 5 n.
c. 10 n.
d. 15 n.
e. none of these
The correct option is (b) 5n
A result, the object is being acted upon by a net downward force of 5N.
Briefing :The force that is produced by summing the vector sums of all the forces acting on an object is known as the resultant force. The effect of the resulting force is the same as the sum of all the acting forces operating on the object. The direction of the forces must be considered when calculating the resulting force.
The northward force is Fn = 10N, given.
Fs = 15N is the southern force.
The net force on the phone is Fnet =?N, which is necessary.
Downward pressure is applied by the object's weight, and upward pressure is applied by upward resistance. The vector sum of these two forces will represent the net force.
Fnet = Fs - Fn (Considering the direction downward as positive)
Fnet = 15N - 10N
Fnet = 5N
There is a net downward force of 5 N acting on the object as a result.
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Autotransformers are especially practical if the difference between the primary and secondary voltages is _____.
Autotransformers are especially practical if the difference between the primary and secondary voltages is realtively small.
What is Autotransformer?An autotransformer is a type of electrical transformer that has just one winding. The word "auto" refers to a single coil that runs autonomously, not to a system that runs without human intervention. The primary winding and secondary winding sides of an autotransformer are distinct portions of the same winding. While there is no metallic conducting channel between the primary and secondary windings of a normal transformer, they are separate. The autotransformer winding has at least three taps that are utilized to connect electrical appliances. In terms of size, weight, and cost, autotransformers usually outperform conventional dual-winding transformers, but they also have the disadvantage of lacking electrical isolation between the primary and secondary circuits. Autotransformers also have advantages in terms of reduced leakage reactance, fewer losses, lower excitation current, and higher VA rating for a given size and mass.Learn more about the Autotransformer with the help of the given link:
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The number of calories that you can eat a day without gaining weight depends on your _____.
The number of calories that you can eat a day without gaining weight depends on your activity level
For there to be a balance between the number of calories consumed through food and weight gain, it is important to maintain a good level of physical activity that helps us to maintain a healthy weight and at the same time does not allow an increase in weight and body mass.
All this is because the relationship between daily calories consumed and weight gain is directly proportional to the level of physical activity that we do.
What is body mass?It is the amount of mass associated with a person's body
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An astronaut on a strange planet finds that she can jump a maximum horizontal distance of 15 m if her initial speed is 3 m/s. what is the free-fall acceleration on the planet?
Answer:
R = V^2 sin 2 θ / g range formula
R is a maximum for θ = 45 and R = V^2 g
g = V^2 / R = 3^2 / 15 = .6 m/s^2
Gym lockers are to be numbered from 1 through 99 using metal numbers to be nailed onto each locker. how many 7s are needed?
There are nineteen gym lockers that would have the digit "seven" on them.
How many sevens are there?In this problem, we need to know the number of gym lockers that would have the number 7 attached to them either as tens or digit as the lockers are numbered from one to ninety nine.
Let us now proceed which lockers would have the digit "seven" on them;
7, 17, 27, 37, 47, 57, 67, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 87, 97. We can see that there are nineteen gym lockers that would have the digit "seven" on them.
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What would be the magnitude of a
velocity vector that had x- and y-
components of 36 m/s and 48 m/s,
respectively?
12 m/s
60 m/s
84 m/s
3600 m/s
The magnitude of a velocity vector that had x- and y-components of 36 m/s and 48 m/s, respectively is 60 m/s. Thus, the correct option for this question is B.
What is magnitude?The term magnitude may be characterized as the distance or quantity. The magnitude can be significantly utilized in order to describe the comparison of speeds. This term can remarkably be used to demonstrate the distance traveled by an object or to illustrate the amount of an object in terms of its magnitude.
The magnitude of the velocity vector may be defined as the total value which is the square root of the value. The magnitude of the vector can be, |a| = √ ( x² + y² ).
Now, substituting the values of x component and y component given, = √ ( 36² + 48² ) = √ ( 1296 + 2304) = √ 3600 = 60 m/s.
Therefore, the magnitude of a velocity vector is found to be 60 m/s. Hence, Option B is the correct answer.
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Indicate the correct order of steps as you bring an object into focus under high power.
Whenever you wish to bring an object into focus under high power, the correct order of steps are as listed below:
"Place slide on stage and secure with stage clips.""Turn on the light and center the specimen over the light source.""Focus specimen on low power using coarse focus adjustment.""Use fine focus to sharpen the image under low power.""Rotate high power lens into position.""Readjust fine focus under high power to produce the sharpest image."What is a microscope?A microscope can be defined as an optical device that is typically designed and developed to produce a magnified (an enlarged) image of a minute (very tiny) object, so as to show all the littlest and tiniest details about the object which cannot be seen by the natural human eye.
The types of microscopes.In Science, there are different types of microscope used for magnifying an object and these include the following:
Polarizing microscope.Transmission electron microscope.Inverted microscope.Scanning electron microscope.Compound light microscope.In conclusion, you should use the coarse focus adjustment to focus the specimen on low power and then, ensure that fine focus is readjusted under high power in order to produce the sharpest image of this specimen.
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Complete Question:
Indicate the correct order of steps as you bring an object into focus under high power. Rank the options below.
Place slide on stage and secure with stage clips.
Focus specimen on low power using coarse focus adjustment.
Use fine focus to sharpen the image under low power.
Readjust fine focus under high power to produce the sharpest image.
Rotate high power lens into position.
Turn on the light and center the specimen over the light source.
For what type of object is the period-luminosity relation used for determining distances?
a. rr lyrae variables
b. t tauri variables
c. cepheids cataclysmic variables
d. planetary nebulae
Cepheids cataclysmic variables object is the period-luminosity relation used for determining distances.
What is Cepheids cataclysmic variables?Cepheid Variables are very bright stars that are 500–300,000 times as bright as the sun. They undergo brief variations every 1–100 days. They are pulsing variables that follow a predetermined pattern and experience rapid expansion and contraction. Other pulsating variables include RR Lyrae stars, which are short period, older stars that are not as massive as Cepheids; and RV Tauri stars, which are super giants with higher light fluctuations. Astronomers may study the variability of a Cepheid's brightness to determine its distance.
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Explain briefly the trnsmission of radio waves
Answer: A radio wave is generated by a transmitter and then detected by a receiver. An antenna allows a radio transmitter to send energy into space and a receiver to pick up energy from space. Transmitters and receivers are typically designed to operate over a limited range of frequencies.
Explanation: