The height of the ball above the projection point is 20.6 m after 2.0 s.
Given data, Initial velocity (u) = 25 m/s
Angle of projection (θ) = 30°Time (t) = 2.0 s
We have to find the height of the ball above the projection point (H).
Formula: The formula used to find the height of the ball above the projection point is given by
H = ut sinθ - 1/2 gt²
Here, g = 9.8 m/s² (acceleration due to gravity)
Substitute the given values in the above formula,
H = 25 × sin30° × 2.0 - 1/2 × 9.8 × (2.0)²= 20.6 m
Therefore, the height of the ball above the projection point is 20.6 m after 2.0 s.
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Match the following temperatures in °C and Kelvin
0°C
150 K
20 °C
500 K
:: 227 °C
III
:: 293 K
:: 273 K
:: -123 °C
The temperature in Celsius and Kelvin are;
0°C = 273 K150 K = -123⁰C20 ⁰C = 293 K500 K = 227⁰CWhat is the measure of the following temperatures?The temperature of a body is the measure of the degree of hotness or coldness of a body.
Also temperature can be defined as the measure of the average kinetic energy of a body.
The conversion of the temperature in degrees Celsius to kelvin is calculated as follows;
0°C = 273 K
150 K = 150 - 273 = -123⁰C
20 ⁰C = 20 + 273 = 293 K
500 K = 500 - 273 = 227⁰C
Thus, to convert from degrees Celsius to Kelvin we simply add 273 K and to convert from Kelvin scale to Celsius scale we simply subtract 273 from the Celsius temperature.
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Why can mountains on Earth NOT grow as high as those on Mars? O The rate of uplift is significantly higher on Mars. The geothermal gradient on Earth is too high. Gravity on Earth is much lower than on Mars. The rate of erosion is significantly higher on Earth. 0.5 pts
Mountains on Earth do not grow as high as those on Mars as d. The rate of erosion is significantly higher on Earth.
Because of Earth's greater rate of erosion, mountains on Earth cannot grow as high as those on Mars. Erosion is process of wearing down and removing material from Earth's surface, which involves the progressive erosion of rocks and the movement of sediments by water, wind, and other natural forces. On Earth, erosion is a dynamic and continual process influenced by elements such as precipitation, wind, glaciers, and rivers. Over time, these forces weather and erode mountains, gradually lowering their height and changing their shape.
The maximum height that mountains can reach on Earth is restricted by weathering and erosion. But compared to Earth, erosion rate on Mars is far lower. In comparison to Earth, Mars has a much thinner atmosphere, weaker winds, and considerably less water. The erosive factors that affect Martian terrain are hence considerably less. Since Martian mountains may maintain their height and shape for longer periods of time, larger peaks can grow as a result.
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Complete Question:
Why can mountains on Earth NOT grow as high as those on Mars?
a. The rate of uplift is significantly higher on Mars.
b. The geothermal gradient on Earth is too high.
c. Gravity on Earth is much lower than on Mars.
d. The rate of erosion is significantly higher on Earth.
two homogeneous bodies of the same volume
Answer:
No, it is not necessary for them to have same mass.
Explanation:
Let both bodies have a density d1 and d2 respectively.
Since their volumes are equal V1 = V2
we know that, https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bvolume%7D
Hence, d1 = and d2 =
Taking the ratio of densities,we get
This implies that unless the bodies have same densities, the mass of the two bodies will not be same.
PLEASE HELP ITS DUE IN 5 MINUTES
Try the aquatics exercises you learned in lesson 02.07 Aquatics. What was the most difficult part of completing the leg action of treading water or bicycling in the air? Why?
Answer:
For bicycling it was getting over the fear of me hurting myself pretty bad, this is because the fear is all in your head (I don't know psychology but that's true).
And for treading water it was that the leg movements took time to get used to, because they were strange and confusing to me.
if the mass of the child and sled is 32 kg , what is the magnitude of the average force you need to apply to stop the sled? use the concepts of impulse and momentum
the magnitude of the average force required to stop the sled is 16 times the velocity of the sled in meters per second.
To calculate the magnitude of the average force required to stop the sled, we can use the concept of impulse and momentum. The equation that relates these two concepts is:
FΔt = mΔvwhere F is the force, Δt is the time interval during which the force is applied, m is the mass of the object, and Δv is the change in velocity.Let's assume that the sled was initially moving with a certain velocity v and that you want to bring it to a complete stop.
The final velocity of the sled will be 0 m/s. Since the mass of the child and sled is 32 kg, we can use the following equation to calculate the average force required to stop the sled:
FΔt = mΔvF Δt = (32 kg) (- v)F Δt = -32v
To determine the value of F, we need to know the time interval Δt during which the force is applied. If we assume that it takes 2 seconds to bring the sled to a stop, then:
F (2 s) = -32vF = -16v Newtons
Therefore, the magnitude of the average force required to stop the sled is 16 times the velocity of the sled in meters per second.
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4. Two students have volunteered to explore the galaxy in a spaceship. As they travel through space, they
measure the magnitude of the gravitational force between their spaceship and the Earth. They find that the
gravitational force on the spaceship is -
A. proportional to the distance from the Earth
B. inversely proportional to the distance from the Earth
C. proportional to the square of the distance from the Earth
D. inversely proportional to the square of the distance from the Earth
Answer:B
Explanation:
They find that the gravitational force on the spaceship is inversely proportional to the distance from the Earth. The correct option is B.
What is gravitational force?The gravitational pull would be stronger if the gap were cut in half. Coulomb's law, states that the gravitational force between two items in the universe is directly proportional to the product of the masses of the objects.
And inversely proportional to the distance between them is used to calculate the gravitational force between two objects in the universe. Whether there is a body there or not, gravity is the force between two bodies.
Everybody in the cosmos is drawn to every other body by a force that is directly inversely correlated to the square of the distance between them and directly inversely correlated to the product of their masses.
Therefore, the correct option is B. inversely proportional to the distance from the Earth.
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Which hand is negatively charged?
A
B
C
D
Answer:
B
b
b
b
b
b
b
b
b
b
b
b
b
b
b
bb
b
b
b
b
b
b
b
b
b
b
b
b
b
b
Answer:
B is the answer
Explanation:
i marked b on my test and got 100%
Explain why the radiative zone of the sun is hotter than the corona of the sun
Answer: Because The spectra provided evidence to explain why the sun's atmosphere is so much hotter than its surface. ... Clear evidence now suggests that the heating mechanism depends on regular, but intermittent explosive bursts of heat, rather than on continuous gradual heating.
Explanation:
A. It Implies That M Is Finitely Generated. B. It Implies That M Has Nonzero Elements Of Nonzero Order. C. When Every Non-Null Element Has Null . D. In The Case That The Ring R Is A Body. E. None Of The Above Alternatives Gives A
Which of the following alternatives give a true statement. Justify your answer.
A modulus M over a ring R has a finite basis:
a. It implies that M is finitely generated.
b. It implies that M has nonzero elements of nonzero order.
C. When every non-null element has null .
d. in the case that the ring R is a body.
e. None of the above alternatives gives a true statement.
Which of the following statements are true?
a. If a subset of a module generates that whole module, then the subset cannot be
empty.
b. Every submodule S of a module M verifies the inequality C. Two different subsets of M have to generate two different submodules of M.
d. If S generates a submodule N of the module M, then contains S.
e. Neither statement is true.
The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.
When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.
According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.
According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.
According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.
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earth's magnetosphere is generated by question 12 options: 1) dynamo-like motions in earth's interior. 2) nuclear fusion in earth's core. 3) nuclear fission in earth's core. 4) gravitational accretion.
Earth's inner movements resemble dynamos and produce the magnetosphere. The magnetosphere of Earth is a dynamic, networked system that reacts to solar, planetary, and interstellar circumstances.
The area surrounding a planet where the magnetic field of the planet is dominant is called a magnetosphere. All of the rocky planets in our solar system have magnetospheres, but Earth's is the strongest. The enormous, comet-shaped bubble that makes up Earth's magnetosphere has been essential to the planet's capacity to support life. This magnetic environment has protected life on Earth from its inception and continues to do so. The magnetosphere protects our planet from solar and cosmic ray radiation as well as the solar wind's steady stream of charged particles that stream off the sun, which may erode the atmosphere.
Due to the convective motion of charged,
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still don’t know what to do with this stuff
Answer:
what?
Explanation:
A car travels a distance of 36 m in 12 seconds How fast is the car moving?
Which of the following statements is consistent with Thomson’s and Millikan’s work with cathode rays and electrons? (A) Cathode rays from helium atoms are heavier than cathode rays from hydrogen atoms. (B) Cathode rays are attracted toward a negatively charged electric plate. (C) The mass of an electron is about 2000 times lighter than the mass of a hydrogen atom. (D) The plum pudding model of the atom consists of a uniform sphere of negative charge in which the protons are embedded, like raisins in a pudding.
Answer:
Dalton's ideas proved foundational to modern atomic theory. However, one of his underlying assumptions was later shown to be incorrect. Dalton thought that atoms were the smallest units of matter-−minustiny, hard spheres that could not be broken down any further. This assumption persisted until experiments in physics showed that the atom was composed of even smaller particles. In this article, we will discuss some of the key experiments that led to the discovery of the electron and the nucleus.
J.J. Thomson and the discovery of the electron
In the late 19^{\text{th}}19
th
19, start superscript, start text, t, h, end text, end superscript century, physicist J.J. Thomson began experimenting with cathode ray tubes. Cathode ray tubes are sealed glass tubes from which most of the air has been evacuated. A high voltage is applied across two electrodes at one end of the tube, which causes a beam of particles to flow from the cathode (the negatively-charged electrode) to the anode (the positively-charged electrode). The tubes are called cathode ray tubes because the particle beam or "cathode ray" originates at the cathode. The ray can be detected by painting a material known as phosphors onto the far end of the tube beyond the anode. The phosphors spark, or emit light, when impacted by the cathode ray.
A diagram of a cathode ray tube.
A diagram of a cathode ray tube.
A diagram of J.J. Thomson's cathode ray tube. The ray originates at the cathode and passes through a slit in the anode. The cathode ray is deflected away from the negatively-charged electric plate, and towards the positively-charged electric plate. The amount by which the ray was deflected by a magnetic field helped Thomson determine the mass-to-charge ratio of the particles. Image from Openstax, CC BY 4.0.
To test the properties of the particles, Thomson placed two oppositely-charged electric plates around the cathode ray. The cathode ray was deflected away from the negatively-charged electric plate and towards the positively-charged plate. This indicated that the cathode ray was composed of negatively-charged particles.
Thomson also placed two magnets on either side of the tube, and obser
Explanation:
A bungee jumper starts with 1000 J in their GPE store. After they jump they fall and are brought to a stop with the bungee cord. With the cord fully stretched what is the energy in the EPE store?
Answer:
energy is equal to 1000 J
Explanation:
When the jumper is in the tent, he has a given height, this height gives him a gravitational potential energy, which forms his initial mechanical energy of 1000 J. After jumping, this energy is converted into elastic energy of the rope plus a remainder of potential energy gravitational, it does not reach the ground, but as the friction is negligible the total mechanical energy is conserved, therefore its energy is equal to 1000 J
This is a case of energy transformation, but the total value of mechanical energy does not change
what is the wavelength of a 1.2 mhz ultrasound wave traveling through aluminum?
The wavelength of a 1.2 MHz ultrasound wave travelling through aluminium is approximately 2.5 mm.
Ultrasound waves are mechanical waves that propagate through a medium, such as a solid, liquid, or gas. The wavelength of an ultrasound wave can be calculated using the formula:
\(\[\text{{Wavelength}} = \frac{{\text{{Speed of Sound}}}}{{\text{{Frequency}}}}\]\)
In this case, the frequency of the ultrasound wave is given as 1.2 MHz (1.2 × \(10^6\) Hz). The speed of sound in aluminium is approximately 6420 m/s. By substituting these values into the formula, we can calculate the wavelength:
\(\[\text{{Wavelength}} = \frac{{6420 \, \text{{m/s}}}}{{1.2 \times 10^6 \, \text{{Hz}}}} = 0.00535 \, \text{{m}} = 5.35 \, \text{{mm}}\]\)
Therefore, the wavelength of a 1.2 MHz ultrasound wave travelling through aluminium is approximately 2.5 mm. It's worth noting that this calculation assumes a uniform medium and does not take into account any potential reflections, refractions, or other interactions that may occur at interfaces within the material.
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which type of energy does a ball falling through the air have?
Answer:
the answer would be kinetic energy
A student accurately measured the volume of a solution, but spilled some before measuring solution mass. What is the effect on calculated solution density? Choose the best answer.The calculated solution density is higher than the actual density.The calculated solution density is lower than the actual density.The calculated solution density is the same as the actual density.
The effect on calculated solution density is option (b) The calculated solution density is lower than the actual density
Density is defined as the mass of an object or substance divided by its volume. Therefore, to calculate the density of a solution, you need to measure both its mass and its volume accurately. In this case, the student accurately measured the volume of the solution but spilled some of it before measuring its mass. This means that the measured mass is less than the actual mass of the solution.
As a result, the calculated density, which is the measured mass divided by the measured volume, will be lower than the actual density, which is the actual mass divided by the actual volume. This is because the measured mass is less than the actual mass, but the measured volume is accurate, leading to an overall lower density calculation.
Therefore, the correct option is (b) The calculated solution density is lower than the actual density
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treat each of your eyes as a circular aperture of diameter 3.4 mm. light of wavelength 442 nm is used to view two point sources that are 139 m distant from you. how far apart must these two point sources be if they are to be just resolved by your eye? assume that the resolution is diffraction limited and use rayleigh's criterion.
The resolution limit for a circular aperture of diameter d for a light of wavelength λ is given by the formula, d = 1.22λ/D, where D is the separation between two point sources. So for the given situation,
d = 1.22 x 442 x 10^-9 m / 139 m = 1.22 x 442 x 10^-9 m / 139 m.
Solving for D, we get
D = 1.22 x 442 x 10^-9 m / (3.4 x 10^-3 m) = 1.22 x 442 / 3.4 x 10^-6 m = 1.22 x 442 x 10^6 / 3.4 m = 0.0635 m. Therefore, the two-point sources must be separated by 0.0635 meters to be just resolved by the eye.
The result of imaging a point object through a circular aperture, such as our eye's lens or iris, is not a point but a diffraction pattern. This is true, especially when the object's size and the light's wavelength are comparable.
Concentric circles that become dimmer as we go away from the center are formed by a circular aperture. They are referred to as Airy discs.
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What type of charge is used as the test charge to determine the direction of electric fields?
A. small negative charge
B. small positive charge
C. small neutral charge
D. small uniform charge
Answer:
B small positive charge
Explanation:
Do some research and find out the acceleration due to gravity on the Moon and on each planet
listed in the table. For each site, calculate the gravitational force that would act on a 70-kilogram
person on the surface of each site. Use your calculations to complete the table. Remember to
use the same units in each calculation.
Planet or Moon
Venus
Earth
Earth's Moon
Mars
Jupiter
Acceleration due to gravity
Force experienced by 70 kg
person
The acceleration due to gravity varies according to the size of the planet.
What is the list of the acceleration due to gravity on the moon and on all the planets?Here is a list of the acceleration due to gravity (g) on the Moon and on the planets in our Solar System:
Moon:
g = 1.62 m/s^2
Mercury:
g = 3.7 m/s^2
Venus:
g = 8.87 m/s^2
Earth:
g = 9.8 m/s^2
Mars:
g = 3.71 m/s^2
Jupiter:
g = 24.79 m/s^2
Saturn:
g = 10.44 m/s^2
Uranus:
g = 8.87 m/s^2
Neptune:
g = 11.15 m/s^2
It's worth noting that the acceleration due to gravity is affected by the mass and size of a celestial body. Larger and more massive objects have a stronger gravitational pull and therefore a higher acceleration due to gravity.
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Ignore friction. A 20. Lb. Object was lifted to a height of 10 feet by a force of 30. Lb. (a) How much work (ft.Lb) is done by the force? (b) Find the change in potential energy (ft.Lb) of the object
(a) The work done by force in lb-ft is 300 lb-ft.
(b) The change in potential energy of the object is 200 lb-ft.
Work done by forceThe work done by force in lb-ft is calculated as follows;
W = Fd
W = 30 x 10
W = 300 lb-ft
Change in potential energyThe change in potential energy of the object is calculated as follows;
ΔP.E = P.Ef - P.Ei
ΔP.E = 20 x 10 - 0 = 200 lb-ft
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DESPERATE WILL GIVE BRAINLIST AND THANKS
What is one way that genetic engineering could help humans?
A. Gene therapy may be able to help people with genetic disorders make cells that work properly and alleviate their symptoms.
B. Genetic engineering may help bring much needed vitamins and vaccines to people living in poverty.
C. Genetic engineering may help remove genetic predispositions for certain diseases, such as cancer, from a person’s DNA.
D. These are all ways genetic engineering could help humans.
Answer:
I Choose C, Because Genetically engineered bacteria and other microorganisms are currently used to produce human insulin, human growth hormone, a protein used in blood clotting, and other pharmaceuticals and the number of such compounds could increase in the future.
So Basically There Saying It Can Be Used To Remove Certain Diseases.
Which of the following statement/s is/are true? Check all that apply. Jupiter's Great Red Spot is in the southern hemisphere of the planet The fastest wind speed recorded in our solar system is on the dwarf planet Pluto Neptune's Great dark spot is in the northern hemisphere of the planet Water geyser is located on the South Pole of Saturn's Moon Enceladus The Hexagon hurricane is on the North Pole of the planet Uranus
The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.
Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.
The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.
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Compared to their values on Earth, on another planet yourmass would be the same but your weight would be different.
Your bulk and weight would be different on a different planet compared to how they are on Earth.
The correct option is A.
What do you mean by mass?This was the most basic characteristic of matter and is one of the essential building blocks of physics. The term "mass" refers to a body's total amount of matter. The kilo is the SI unit of mass (kg). A body's bulk remains constant throughout time.
How is mass determined?Scientists frequently use balances to quantify mass. Using an electronic balance or a beam balance, one may directly determine the mass of solids. A liquid's mass may be calculated by measuring its volume and using the density table to determine the liquid's density. The kg is the SI mass unit (Kg).
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The complete question is -
Compared to their values on Earth, on another planet your
(a) mass and weight would both be the same.
(b) mass would be the same but your weight would be different.
(c) weight would be the same but your mass would be different.
A wave moving with a speed of 0.5 m/s has a frequency of 50 Hz. What is the wavelength of the wave?
The wavelength of the wave moving with speed of 0.5 m/s and frequency of 50 Hz is 0.01 m.
Wavelength represents the distance between two successive crests or troughs of the wave.
Wavelength is calculated as follows:
λ = v / f
where λ, v, and f represent the wavelength, velocity, and frequency of the wave respectively.
v = 0.5 m/s
f = 50 Hz
Calculating the wavelength based on the above data:
λ = 0.5 / 50 = 0.01 m
Hence, the wavelength of the wave moving with speed of 0.5 m/s and frequency of 50 Hz is 0.01 m.
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The wavelength of the wave is 0.01m.
Given,
Speed of the wave, c = 0.5m/s.
Frequency of the wave, u = 50Hz.
Frequency is the number of complete vibration cycles of a medium in one second. And wavelength is the distance over which the waveshape repeats .
Now we have an equation frequency of an electromagnetic wave u = c/l. Wher u is the frequency of the waveform, c is the speed at which the wave is propagating and l is the wavelength.
Thus we can obtain wavelength l = c/ u = 0.5/50 = 0.01 meter.
Similarly, time period T can be obtained from this.
T= 1/u.
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ANSWER ASAP GIVING BRAINLIEST FIVE STARS AND A HEART!
As sound waves move throughout a medium the particles from it vibrate in different directions.
Answer:
Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves. A vibrating string can create longitudinal waves as depicted in the animation below.
the volume of matter is due mostly to its electrons. protons. both of these
The volume of matter is primarily due to its electrons and protons.
Correct option is C.
Electrons are an essential element of all atoms, and contribute significantly to the overall volume of all matter. Protons are also essential elements of all atoms, and contribute to the overall volume of matter as well. Responsibility for the majority of the volume of matter lies with the electrons.
Electrons are negatively charged particles that are much smaller than protons. While electrons occupy the space in the atoms, protons are responsible for maintaining the atoms stable due to their positive charge. As such, electrons and protons both play an important role in maintaining the overall volume of matter.
Moreover, neutrons, which are located within the nucleus of atoms, also contribute to the overall volume of matter as they are needed to balance the positive charge of protons. In conclusion, electrons and protons are responsible for the majority of the volume of matter, as they are the essential elements that constitute atoms.
Correct option is C.
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Correct question is :
the volume of matter is due mostly to its
a. electrons.
b. protons.
c. both of these
d, none
a massless rod connects two masses and rotates about a fixed axis through the center. can the total acceleration of the rod/mass combination be zero if the angular velocity is constant? explain.
No, if the angular velocity is constant, the combined acceleration of the mass and rod cannot be zero. Because two masses are connected by a massless rod that revolves around its Centre on a fixed axis.
In one-dimensional motion, constant speed is related with zero acceleration, however in two- and three-dimensional kinematics, things are a little different since, for example, a system particle rotating at constant speed does experience acceleration (not angular acceleration though). Due to the constant magnitude velocity vector that is always tangential and perpendicular to the position vector in the direction of the centripetal force, the total acceleration of the mass/rod cannot be zero if the angular velocity is constant.
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State the Doppler Effect in words.
Answer:
the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the source of the wave. When the observer is moving towards the source, the waves are compressed and the frequency increases (called a blue shift). Conversely, when the observer is moving away from the source, the waves are stretched and the frequency decreases (called a red shift). This phenomenon can be observed in sound waves, light waves, and other types of waves.
Answer: an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other
Explanation:
\(what \: is \: refraction \: of \: light \: {?} \)
When light passes through one transparent medium to another transperent medium it bends and that beding of light is know as refraction of light !