The wavelength released in transition energy is 4.23 x 10¯⁶ m.
We need to know about transition energy to solve this problem. Electrons in a hydrogen atom can move to another level of energy. It is also called a transition. In this process, electrons will absorb or release their energy to move. The transition energy can be determined as
ΔE = E2 - E1
where ΔE is transition energy, E2 is the final state of energy and E1 is the initial state of energy.
The state energy of a hydrogen atom can be calculated by
E = -(13.6) / n² eV
E = h.c / λ
where n is the number of energy states, h is Planck constant (4.136 x 10¯¹⁵ eV/Hz), c is speed of light (3 x 10⁸ m/s) and λ is wavelength.
From the question above, we know that
n1 = 5
n2 = 2
By substituting the following parameter, we get
ΔE = E2 - E1
ΔE = -(13.6) / n2² - (-(13.6) / n1²)
ΔE = -(13.6) / 2² - (-(13.6) / 5²)
ΔE = 0.544 - 0.85
ΔE = -0.306 eV
the energy is minus because it got released.
Calculate the wavelength released
ΔE = 0.306 eV
h.c / λ = 0.306 eV
4.136 x 10¯¹⁵ . 3 x 10⁸ / λ = 0.306
λ = 4.23 x 10¯⁶ m
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What is the density of a liquid (in g/ml) if 1.00 gallon weighs 10.47 lb ? (1 gal = 4 qt)
The liquid density is 1.25 g/ml.
We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as
ρ = m / V
where ρ is density, m is mass and V is volume
From the question above, we know that
m = 10.47 lb
V = 1 gal
Convert mass to grams
m = 10.47 lb
m = 10.47 x 453.592 grams
m = 4749.11 grams
Convert volume to milliliters
V = 1 gal
V = 1 x 3785.41 ml
V = 3785.41 ml
By substituting mass and volume, we can determine the density
ρ = m / V
ρ = 4749.11 / 3785.41
ρ = 1.25 g/ml
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Which statement describes the best reason for having a strong hypothesis?
According to the given statement these option are apply for strong hypothesis:
B-A good hypothesis results in a test with quantifiable outcomes.
C-A good hypothesis leads to a test with measurable results.
E-A good hypothesis provides a possible explanation to answer a scientific question.
What is a hypothesis example?A few examples of simple hypotheses: "Students who eat breakfast will perform better on a math exam than students who do not eat breakfast." Complex hypothesis: "Students who experience test anxiety before an English exam will get lower scores than students who do not experience test anxiety."
What three categories of hypothesis are there?Simple hypothesis is one example of a hypothesis. complex hypothesis direction-hypothesis
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Which statement describes the best reason for having a strong hypothesis ? Check all that apply.
A-A good hypothesis is based on one's personal opinion.
B-A good hypothesis can be tested.
C-A good hypothesis results in a test with quantifiable outcomes.
D-A good hypothesis does not always have to be based on prior knowledge or research.
E-A good hypothesis provides a possible explanation to answer a scientific question.
If the amplitude of the elctic field in a plane electromagnetic wave is 100 v/m then the amplitude of the magnetic feild is:_________
The amplitude of the electric field in a plane electromagnetic wave is 100 v/m then the amplitude of the magnetic field is 3.34×[tex]10^{-7}[/tex].
What is an Electromagnetic wave?Electromagnetic waves, or EM waves, are produced by the oscillations of an electric field and a magnetic field. In other words, electromagnetic (EM) waves are created when magnetic and electric fields oscillate.
Electromagnetic waves are produced when an electric field and a magnetic field interact. They are referred to as "electromagnetic" waves as a result. The electric field and magnetic field of an electromagnetic wave are perpendicular to one another (at right angles). They are also parallel to the direction of the EM wave.
According to the question,
Electric Field, E₀= 100 v/m and,
B₀/E₀=1/c
The amplitude of the magnetic field will be :
B₀=E₀/c
=100/(3×[tex]10^{8}[/tex])
B₀=3.34×[tex]10^{-7}[/tex]
Hence, the amplitude of the magnetic field is 3.34×[tex]10^{-7}[/tex].
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A 121 v electric iron draws 6.65 a of current. how much heat is developed per hour? answer in units of j.
The heat developed per hour is 2896740 J/h.
The electric potential of the electric iron is V.
V = 121 v
The current drawn by the electric rod is I.
I = 6.65 A
The heat developed is,
Power = Electric potential × Current
P = V × I
= 121 × 6.65
= 804.65 watts
Heat developed developer in watts is 804.65 watts.
The heat developed in joules per second is,
= 804.65 J/s
The heat developed in joules per second is 804.65 Joules per second.
The heat developed per hour is,
[tex] = \frac{804.65}{ \frac{1}{3600}hour } [/tex]
= 2896740 J/h
Therefore, the heat developed per hour is 2896740 joules per hour.
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_____________ is a measure of the brand's ability to capture consumer preference and loyalty.
Brand equity is a measure of the brand's ability to capture consumer preference and loyalty.
When compared to a generic equivalent, brand equity is the value premium that a firm raises from a product with a successful brand. Companies can build brand equity for their merchandise by making them easily recognizable, memorable, and superior in terms of quality and dependability.
Customers graciously pay a premium for a company's products when it has good brand equity, even if they could purchase the exact thing from a rival for less. Customers effectively pay a high price to do business with a company they know and respect. Because the business with brand equity does not encounter a higher cost than its competitors to create and distribute the product, the price difference goes to their margin.
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What’s a transverse? (Definition)
Answer: acting, lying, or being across : set crosswise. 2 : made at right angles to the long axis of the body a transverse section.
Explanation:
What is the fundamental frequency of a 0.672-m-long tube, open at both ends, on a day when the speed of sound is 344 m/s?
The fundamental frequency of a 0.672-m-long tube, open at both ends, on a day when the speed of sound is 344 m/s is 256 Hz.
How to calculate the fundamental frequency?The fundamental frequency is the lowest frequency that any given instrument can produce. The instrument's first harmonic is another name for the fundamental frequency.
Given,
Length of the tube = 0.672-m
Speed of sound = 344 m/s
Tube open at both the ends
Solution:
Since the tube is open at both ends,
[tex]f_{n}[/tex] = n ([tex]V_{w/2L}[/tex])
n = 1, 2, 3, 4,...
[tex]f_{1}[/tex] = 1(344/2*0.672)
= 256 Hz
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In the electromagnetic spectrum, which type of radiation has less energy than visible light?
In the electromagnetic spectrum, the type of radiation that has less energy than visible light is microwave.
The electromagnetic spectrum is the arrangement of all types of electromagnetic radiation in order of decreasing frequencies and increasing wavelength. In the electromagnetic spectrum, the frequencies of the electromagnetic radiation can range from as low as 1 hertz to as high as 100 million hertz.
Frequency is directly proportional to energy. In other words, the more frequency an electromagnetic wave has, the more energy it will also have. The electromagnetic wave with the highest frequency and energy is gamma ray. Visible light falls somewhere in the middle of the spectrum, and the frequency of microwaves is less than that of visible light. Hence, microwaves have less energy than visible light.
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when using parallax distance is calculated from the sun and not earth do you think this matters? explain your answer.
When using parallax, astronomers calculate distance from the sun and not earth to improve on the accuracy of their measurement, since parallax angle decreases as star distance increases.
What is parallax distance?
Parallax enables astronomers to measure the distances of far away stars by using trigonometry.
Why does astronomers measure parallax distance from sun?As the distance of star increases, the parallax angle decreases, and great degree of accuracy is required for its measurement.
So taking a refence from the earth instead of the sun will impact the accuracy of their measurement.
Thus, when using parallax, astronomers calculate distance from the sun and not earth to improve on the accuracy of their measurement, since parallax angle decreases as star distance increases.
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The input voltage to a transformer is 120v dc to the primary coil of 1000 turns. what are the number of turns in the secondary needed to produce an output voltage of 10v dc?
The transformer secondary turns should be 83 turns.
We need to know about the transformer to solve this problem. Transformer is a device that can increase or reduce the voltage. The changed voltage depends on the current and number of coil turns. It can be written as
Vi / Vs = Ni / Ns = Is / Ii
where Vi is input voltage, Vs is output voltage, Ni is primary turn, Ns is secondary turn, Is i output current and Ii is input current.
From the question above, we know that
Vi = 120 V
Ni = 1000 turns
Vs = 10V
By substituting the following parameters, we can calculate the secondary turns
Vi / Vs = Ni / Ns
120 / 10 = 1000 / Ns
Ns = 1000 / 12
Ns = 83 turns
Hence, the transformer secondary turns should be 83 turns.
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A 2.0-kg object starts from rest at the origin. a 4.0 n force is applied to the object. how far will the object travel in 1.0 seconds?
A 2.0 kg object which is applied a 4.0 n force will travel 1.0 m in 1.0 seconds
To solve this exercise the formula for net force and the formula for uniformly varied rectilinear motion (UVRM) to be applied are:
F = m * ax = vi * t + (a * t²) / 2Where:
F = Forcem = massa = accelerationvi = initial velocityx = distancet = timeInformation about the problem:
m = 2.0 kgvi = 0 m/st = 1 sF = 4.0 Na = ?x = ?N = kg * m/s²Applying the net force formula and isolating the acceleration, we get:
F = m * a
a = F/m
a = 4.0 kg * m/s² / 2.0 kg
a = 2.0 m/s²
Applying the formula for UVRM we can calculate the distance:
x = vi * t + (a * t²) / 2
x = 0 m/s * 1 s + (2.0 m/s² * (1 s)²) / 2
x = (2.0 m/s² * 1 s² / 2
x = 2.0 m/ 2
x = 1.0 m
What is force?It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.
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Suppose a popular fm radio station broadcasts radio waves with a frequency of 88. mhz. calculate the wavelength of these radio waves. round your answer to 2 significant digits.
The wavelength is 1.87 m of these radio waves round your answer to 2 significant digits.
Radio waves are part of the electromagnetic spectrum, any radiation of that electromagnetic spectrum has a speed of 3.00x10⁸ m/s in vacuum.
Consequently, the following equation can be used to determine the wavelength:
c = λ.ν --------- (1)
Where c is the speed of light, λ is the wavelength and is the frequency.
Then, λ can be isolated from equation 1
λ = c / ν --------- (2)
Keep in mind that Hz units must be used to express frequency.
ν = 160 MHz x (1000000Hz/1 MHz)
= 160000000 Hz
λ = 3 x 10⁸ m/s / 160000000 Hz
But 1 Hz = s⁻¹
λ = 3 x 10⁸ m/s / 160000000 s⁻¹
λ = 1.87 m
Hence, the wavelength is 1.87 m
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(with the guess method) PLEASE SOMEONE HELP-
velocity changes from 2m/s to 12m/s time taken is 5 seconds
Answer: Acceleration is 2m/s^2
Explanation:
The slope of a velocity graph is the acceleration
Acceleration = (Final Velocity - Initial Velocity) / Total Time
A = (12 - 2) / 5
A = 10/5
A = 2
Therefore the acceleration is 2m/s^2
Will the magnet on the left start to rotate? if so, will it initially rotate clockwise or counterclockwise?
The answer is correct, the magnet will start rotating and the magnet on the left side will start rotating in a clockwise direction.
What is a Magnet?Something that can produce magnetic fields, pull similar poles apart, and attract opposing poles.
Basic characteristics of magnets include:
We may observe that when a magnet is covered in iron filings, the strongest attraction causes the filings to attach to the end of the magnet. The magnets' poles are referred to as these points. While unlike poles attract one another, like poles repel. Magnet poles are always found in pairs. If a magnet is suspended freely, it will always point north and south. The pole in space that points north is known as the North Pole, and the pole in space that points south is known as the South Pole. The magnetic force between two magnets increases as the distance between them decreases.If two magnets are permitted to approach one another, their opposite poles will attract. If they are also given free rotation, their opposite poles will eventually come close to one another. The north poles of two magnets repel one another, and vice versa for the south poles.
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Two vectors of the same magnitude are added; one pointing east, one west. the magnitude of the resultant vector is:_________
The net force is zero due to the direction.
We need to know about force resultant to solve this problem. The force resultant is the total net force applied to the object according to the direction. It can be written as
R = F1 + F2 + ... + Fn
where R is force resultant (net force)
From the question above, we know that
F1 = F2 = F N
Because the direction is the same, the force will be minus each other.
R = F1 - F2
R = F - F
R = 0 N
Hence, the net force is 0 N
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The force needed to produce a stress of 1 mpa in a specimen 1 m long and 1 cm x 1 cm in cross section is?
100 N is the force that is needed to produce the stress.
What is stress?Stress in physics is the force exerted on a material’s unit area. Strain is the term for a body’s reaction to stress.
The body can distort under stress. Stress units can be used to quantify the amount of force that a material has experienced.
Stress is equal to (elastic modulus – strain).
In physics, where is the stress?Compressional stress is frequently observed in geological settings along convergent borders where tectonic plates contact. This compressional stress is caused by the weight of the rock pressing down on the rock beneath it.
The overall force applied per unit area is referred to as stress. Pressure and stress are the same in terms of units (Newtons per meter).
CalculationStress = Force / Area
Force = stress × Area
= 1mpa × 1× [tex]10^{-4}[/tex]
= 100N
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If the wye connected phase to neutral voltage is 277vrms, the phase to phase voltage is __________________
If the wye connected phase to neutral voltage is 277vrms, the phase to phase voltage is 480 VRM S.
The fact that voyager 1 continues to speed out of the solar system, even though its rockets have no fuel, is an example of:__________
The fact that voyager 1 continues to speed out of the solar system even though its rockets have no fuel is an example of Newton's first law of motion.
Newton's first law of motion states that "an object will continue to be in a state of rest, or will continue to move at constant speed, unless it is acted upon by a force". In other words, if an object is already moving, it won't slow down or speed up on its own, unless it collides with another object, or a force acts on it.
Voyager 1 was launched in 1977 in an attempt to study the outer solar system. While it was being launched, rockets were used in order to break free from the gravitational pull of the earth. After that, the rockets continued to propel voyager 1 away from the earth, until it eventually ran out of fuel.
Even though its rocket is out of fuel, the satellite will continue to speed out of the solar system. This is because, according to Newton's first law of motion, voyager 1 will still continue in uniform motion out to space, unless it collides with an asteroid, or it enters the gravitational field of another planet, but for now, it will just continue to move.
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what is the change in velocity of a car that starts at rest and has a final velocity of 20 m/s north
P.S. m/s means "meters per second".
Answer:
20 m/s
Explanation:
the final velocity of the car = 20 m/s
Change in the velocity = final velocity - initial velocity
Change in the velocity= 20 - 0
= 20 m/s
Thus, the change in the velocity would be 20 m/s.
A 10 N object sits on top of a shelf, what’s its mass?
A 0kg
B 1 kg
C 10kg
D 100kg
Answer:
D 100kg
Explanation:
[tex]1n = 10kg \\ 10n = g \\ g = 10n \times 10kg \\ = 100kg[/tex]
Fred (m=67 kg) foolishly attempts top jump from a canoe (45kg) to the dock. if he jumps forward with a speed of 3.3 m/s how fast will the canoe move backward
Answer:
Approximately [tex]4.9\; {\rm m\cdot s^{-1}}[/tex] backward, assuming that the canoe was initially stationary.
Explanation:
When an object of mass [tex]m[/tex] is moving at a velocity of [tex]v[/tex], the momentum [tex]p[/tex] of that object would be [tex]p = m\, v[/tex].
With a mass of [tex]m = 67\; {\rm kg}[/tex] and a velocity of [tex]v = 3.3\; {\rm m\cdot s^{-1}}[/tex] forward, the momentum of Fred would be [tex]p = m\, v = 67\; {\rm kg} \times 3.3\; {\rm m\cdot s^{-1}} = 22.11\; {\rm kg \cdot m \cdot s^{-1}}[/tex] (forward.)
Before the jump, the velocity of the boat and Fred were both [tex]0\; {\rm m \cdot s^{-1}}[/tex]. Hence, the momentum of both Fred and the boat would initially be [tex]0\; {\rm kg \cdot m \cdot s^{-1}}[/tex].
Momentum is preserved immediately after the jump. Thus, the momentum of Fred plus the momentum of the boat would still be [tex]0\; {\rm kg \cdot m \cdot s^{-1}}[/tex] after the jump.
Since the momentum of Fred was [tex]22.11\; {\rm kg \cdot m \cdot s^{-1}}[/tex], the momentum of the boat would be [tex](-22.11\; {\rm kg \cdot m \cdot s^{-1}})[/tex] (backward, as the negative sign indicates.)
Rearrange [tex]p = m\, v[/tex] to find velocity in terms of mass [tex]m[/tex] and momentum [tex]p[/tex]:
[tex]\begin{aligned} v &= \frac{p}{m} \\ &= \frac{-22.11\; {\rm kg \cdot m \cdot s^{-1}}}{67\; {\rm kg}} \\ &\approx (-4.9)\; {\rm m \cdot s^{-1}}\end{aligned}[/tex].
In other words, the velocity of the boat would be approximate [tex]4.9\; {\rm m\cdot s^{-1}}[/tex] backwards.
Rocket in space moving at 30 km/s experiences no forces. how fast is the rocket moving after 60 seconds?
The rocket is still moving at 30 Km/s after 60 seconds
What is speed?Speed is the distance travelled per unit. Mathematically, it can be expressed as:
Speed = distance / time
How to determine the speed after 60 secondsThe follwing data were obtained from the question:
Initial speed = 30 Km/sForce = 0 NSpeed after 60 seconds =?From the data given, we were told that the rocket experience no forces.
This simply implies that the rocket was still moving at the said speed (i.e 30 Km/s)
Thus, we can conclude that the speed of the rocket after 60 seconds is 30 Km/s since it experience no forces.
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A ball is thrown upward with an initial velocity of 16 m/s. the approximate value of g is 10 m/s2. at what time does the ball reach the high point in its flight?
The ball that is thrown upward with an initial velocity of 16 m/s will reach the high point in its flight in a time of: 1.6 s
The formula for the vertical launch upward and the procedure we will use is:
t max = v₀/ g
Where:
v₀ = initial velocityg = gravityt max = time to reach maximum heightInformation about the problem:
g = 10 m/s²v₀ = 16 m/st max =?Applying the maximum time formula we get::
t max = v₀ / g
t max =(16 m/s)/(10 m/s²)
t max = 1.6 s
What is vertical launch upwards?In physics vertical launch upwards is the motion described by an object that has been launched vertically upwards in which the height and the effect of the earth's gravitational force on the launched object are taken into account.
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If you walked at a speed of 3 m/s and 15 seconds of time has passed how far have you traveled
Answer: 45 meters
Explanation:
3 m/s ==> 3 meters/second
15 seconds * 3 meters/second=
15*3/1=
15*3=45 meters
a fish tank with mass 1.0kg is placed on a shelf. the dimensions are 37cm x 15cm x 28cm. the shelf can hold a mass of 16kg and the density of water inside it is 1.0g/cm3. calculate the maximum volume of water the fish tank can contain
Therefore, the calculated volume is 1000 cm³
The density of a place refers to the quantity of things—which may include people, animals, plants, or objects—there are in it. Divide the number of objects by the area's measurement to determine density. A country's population density is calculated by dividing its total population by its area, expressed in square kilometers or miles. For instance, a block of the harder, lighter element gold (Au) will be denser than a block of the heavier element lead (Pb).
Volume of fish tank = mass/ density
mass=1.0 kg=1000 g
density=1.0 g/cm³
volume=1000 cm³
Therefore, the calculated volume is 1000 cm³
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At t = 0s, a ball is launched straight upward with a velocity of 19.6 m/s. The ball
slows with constant acceleration until it stops at t = 2.00 s. The ball falls back to
the ground with the same acceleration until it hits the ground with velocity
-19.6 m/s at t = 4.00 s. What is the ball's total displacement after 2.00 s? What is
the ball's acceleration during its entire motion?
The ball's acceleration during its entire motion is -9.6 m/s^2
The ball's total displacement after 2.00 s is 0 m
From the statements, we have got 2 cases, first we have to find acc and then find the distance, we will kinematics equation to solve this
we have given,
u=19.6 m/s
v=0
t=2 second
a=v-u/t
a= -19.6/2
a= -9.6 m/s^2
the ball's acceleration is -9.6 m/s^2
now, we need to find the ball's total displacement after 2.00 s
s=u+gt^2÷2
s= -19.6+9.8×2
s= -19.6+19.6
s= 0 m
the ball's total displacement after 2.00 s is 0 m
Acceleration is the measure of how quickly a body's velocity varies with regard to time. It measures in m/s2.It is claimed that a body has continual positive acceleration when it begins to move with an initial velocity of zero and gradually increases to a positive value over time.To know more about intensity visit : https://brainly.com/question/3046924
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The total displacement of the ball in 2 seconds is o meter.
Displacement is defined as the change in position of an item. it's far a vector amount and has a course and magnitude. it's miles represented as an arrow that points from the beginning role to the final function. as an example- If an object moves from A role to B, then the object's position modifications.
Acceleration is the price of alternate of the rate of an object with admire to time. Accelerations are vector portions. The orientation of an item's acceleration is given via the orientation of the internet force performing on that object.
u=19.6 m/s
v=0
t=2 second
a=v-u/t
a= -19.6/2
a= -9.6 m/s²
The acceleration of the ball is -9.6 m/s²
To find the ball's total displacement after 2.00 s
s=u+gt²÷2
s= -19.6+9.8×2
s= -19.6 +19.6
s= 0 m
Hence, the total displacement of the ball after 2 s is 0 m.
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If a cd player uses electricity at a rate of 16 w, how much energy in kwh does it use in a 6 hours?
An energy unit known as a kilowatt-hour is one kilowatt of power for one hour. It is 3.6 megajoules, or in conventional units.
What is energy in kwh?An energy unit known as a kilowatt-hour is one kilowatt of power for one hour. It is 3.6 megajoules, or in conventional units. Kilowatt-hours are a typical billing unit for the electrical energy that electric companies provide to their customers. The kilowatt-hour (abbreviated kWh) is a measure of energy that represents one kilowatt's (1 kW) power output over the course of one hour. Although it is not a formal standard unit in any system, the kilowatt-hour is frequently employed in electrical applications. A kilowatt hour (kWh) is a unit of measurement for your hourly energy use, whereas a kW is a unit of power. Kilowatt, sometimes known as kW, is a unit of measurement for electricity. Therefore, 1,000 watts make up one kilowatt.The Formula for Calculating Watts Into Kilowatt-Hours:
kWh = (watts × hrs) ÷ 1,000
[tex]= ( 16*6)/1000[/tex]
=0.096 kwh
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You are done with you vacation and you are about to go back to the u.s. where should you exchange your gbp back to usd; at the hotel at 0.80 gbp per usd or at the local bank for 0.72 gbp per usd?
You are done with you vacation and you are about to go back to the u.s. then The local bank of 0.72 gdp is used.
What is GDP?The market worth of all the final goods and services produced and sold (not resold) in a certain time period by countries is measured in dollars using the term "gross domestic product" (GDP).
This measure is frequently amended before being regarded as a trustworthy indication due to its subjective and complex character.
To compare living standards between countries, using a basis of GDP per capita at purchasing power parity (PPP) may be more useful, whereas nominal GDP is more useful for comparing national economies on the global market. GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries.
Therefore, You are done with you vacation and you are about to go back to the u.s. then The local bank of 0.72 gdp is used.
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A student walked 100 meters north, then 100 meters west. How many more meters did the student walk compared to their total displacement from their starting point?.
Answer: The total distance walked is about 59 meters more than the student’s displacement.
Explanation:
The student walked 58.57 meters more than compared to its total displacement from its starting point.
What are Distance and Displacement?Distance is a measurement of how far apart two things or points are, either numerically or occasionally qualitatively. The distance can refer to a physical length in physics or an estimate based on other factors in common usage.
The term "displacement" refers to a shift in an object's position. It is a vector quantity with a magnitude and direction. The symbol for it is an arrow pointing from the initial location to the ending place. For instance, if an object shifts from location A to position B, its position changes. Displacement is the term used to describe this shift in an object's position.
According to the question :
A student walked 100 meters north and then walks 100 meters west then its displacement will be, according to the Pythagoras theorem
h² = p²+b²
h² = 100² + 100²
h² = 20,000
h = 141.42 meters
This means the total displacement is 141.42 meters, but the student has traveled 200 meters.
200 - 141.42 = 58.57 meters
Hence, the student walks 58.57 meters more than the total displacement.
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If you wear contact lenses in the school laboratory,
Answer: Ask the rest of the question.
Explanation:
