The density of solvent is 2448 kg/m³.
What is pressure?Per unit area across which a force is spread, pressure is the force delivered perpendicularly to an object's surface. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.
Pressure is expressed using a variety of units. Some of them come from dividing a force unit by an area unit; for example, the SI pressure unit, the pascal, is derived from this (Pa).
According to the question:
ρ × 10 × 12.5 = 306 × 10³
ρ = 2448 kg/m³
Hence, the density of solvent is 2448 kg/m³.
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if te steady heat flux conducted through this wall is 20 then show how one obtains the temperature distribution t(x)
The temperature distribution t(x) across a wall with steady heat flux conducted through it, t(x) = -Q/(2k) x² + (T2 - T1 + QL/2k)/L x + T1 - QL²/(4k).
To obtain the temperature distribution t(x) across a wall with steady heat flux conducted through it, we need to solve the one-dimensional heat conduction equation,
d²t(x)/dx² = -Q/k
Where t(x) is the temperature at position x, Q is the steady heat flux conducted through the wall, and k is the thermal conductivity of the wall material.
t(x) = -Q/(2k) x² + Ax + B
Boundary conditions,
t(0) = T1 and t(L) = T2
Where T1 and T2 are the temperatures at the two ends of the wall, and L is the length of the wall.
Using these boundary conditions,
A = (T2 - T1 + QL/2k)/L
B = T1 - QL²/(4k)
Substituting these values of A and B in the equation for t(x),
t(x) = -Q/(2k) x² + (T2 - T1 + QL/2k)/L x + T1 - QL²/(4k)
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What is the structure of the following statement? "Our city is plagued with polluted water, and until we pass stricter laws about dumping into the river, it is going to continue."
A. Cause and effect
B. Description
C. Problem and solution
D. Sequence
The structure of the statement is cause and effect.
option A is the correct answer.
Why is the statement "cause and effect"?The structure of the statement is "cause and effect" because it describes a situation where one thing (polluted water) is the result of another (lack of stricter laws about dumping into the river).
The statement suggests that the cause (lack of stricter laws) will continue to result in the same effect (polluted water) unless some action is taken to change the cause. In this way, the statement explains the relationship between the two events or situations and how one leads to the other.
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On a post flight inspection of your aircraft after an aborted takeoff due to an elevator malfunction, you find that the elevator control cable has broken. According to NTSB 830, you
a) must immediately notify the nearest NTSB office
b) should notify the NTSB within 10 days
c) must file a NASA report immediately
You must promptly inform the nearby NTSB office that the elevator control cable has broken, per NTSB 830.
When should the NTSB be notified of an aviation accident if there was significant damage but no injuries?The operator is required to submit a report using NTSB Form 6120.1 or 6120.2, which can be obtained from NTSB Field Offices or the NTSB in Washington, D.C. 20594: ten days following an accident.
What qualifies as an accident in the NTSB's eyes?Any incident involving the operation of an aircraft that occurs between the time a passenger boards with the intention of taking off and the time they have all disembarked and in which a person is killed or seriously injured is referred to as an aircraft accident.
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In the schematically drawn circuit shown below, a light bulb is connected in series with a resistor. What is the total resistance in the circuit?
A) 90 ohms
B) 80 ohms
C) 100 ohms
D) 4 ohms
According to the values of all the resistors in the circuit and their connections, a circuit's overall resistance can be calculated (in series, in parallel, or a combination of both).
How much resistance does the circuit in its whole have?In a series circuit, the sum of each component resistance determines the circuit's overall resistance. The current in a series circuit is the same size everywhere it is present because there is only one channel for electrons to follow.
How much resistance does each parallel resistor add up to?The total resistance for resistors connected in parallel is equal to the reciprocals of each resistor added together.
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80m E 20m S FIND THE AIR SPEED OF THE PLANE RELATIVE TO THE GROUND.
The air speed of an airplane traveling 80 meters east and 20 meters south in a second relative to the ground is about 82.46 m/s
What is the airspeed of a plane relative to the ground?The air speed of a flying airplane relative to (a specified location on) the ground is the difference between the airplane's ground speed and the speed of the wind, found using vectors as follows;
Mathematically, we get;
Airspeed = Ground Speed - Wind SpeedWhereby the velocity of the wind is 120 m/s and the airplane is traveling with an airspeed of 300 m/s due east for example, and the airplane travels 80 meters east and 20 meters south relative to the ground in one second, we get;
Resultant valocity = 80 m/s East, 20 m/s South
v = 80·i - 20·j
The magnitude of the velocity of the plane relative to the ground can be found, using the formula for the magnitude of resultant vector as follows;
|v| = √(80² + (-20)²) = 20·√(17) ≈ 82.46
The air speed of the plane relative to the ground is therefore;
|v| ≈ 82.46 m/s
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During a very quick stop, a car decelerates at 7.6 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires (and that they do not slip on the pavement).
Randomized Variablesat = 7.6 m/s2
r = 0.26 m
ω0 = 95 rad/s (a) What is the angular acceleration of its tires in rad/s2, assuming they have a radius of 0.26 m and do not slip on the pavement?
(b) How many revolutions do the tires make before coming to rest, given their initial angular velocity is 95 rad/s ?
(c) How long does the car take to stop completely in seconds?
(d) What distance does the car travel in this time in meters?
(e) What was the car’s initial speed in m/s?
The angular acceleration of its tires is 26.23 rad/s².
The number of revolutions is by the tire is 24.57 rev.
The time it takes the car to stop is 48.2 s.
The distance of the car will be calculated in d = v0 × t + (1/2) × a × t²
And the car's initial speed in v0.
How to calculate angular acceleration?a) The formula for angular acceleration (α) can be calculated as α = r/a, where r is the radius of the tire and a is the linear acceleration. So, in this case, α = 0.26 / 7.6 = 26.23 rad/s².
b) The formula for angular velocity (ω) at a given time can be calculated as ω = ω0 + αt or ω² = ω²0 + 2αΔΘ , where ω0 is the initial angular velocity and t is the time. To find the number of revolutions, find the time it takes for the angular velocity to reach 0. The equation would be 0 = 95 + 1.97t. ω²= 2 x 26.23ΔΘ. = 9025 = 58.46ΔΘ
ΔΘ = 9025 / 58.46 = 154.375 rad. n = ωt / (2π). = 154.375/2π = 24.57 rev.
c) We can find the time it takes for the tires to come to rest by solving for t in the equation 0 = 95 + 1.97t. So, t = 95 / 1.97 = 48.2 s.
d) The distance traveled by the car can be calculated as d = v0 × t + (1/2) × a × t^2, where v0 is the initial speed and a is the linear acceleration. However, as the initial speed is not given, the distance cannot be determined.
e) The initial speed (v0) cannot be determined as it is not given in the problem.
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A student sets up a circuit like the one shown below and wants to measure the following:
the current in the circuit
the potential difference across the lamp
the electromotive force of the cell
How many ammeters and how many voltmeters does the student need to use?
Group of answer choices
A) 1 ammeter and 2 voltmeters
B) 2 ammeters and 1 voltmeter
C) 3 ammeters and 0 voltmeters
D) 0 ammeters and 3 voltmeters
Answer:
see below
Explanation:
To measure the current in a circuit we need an ammeter. it is connected in series in the circuit.
To measure potential difference across the lamp you will need a voltmeter. A voltmeter is connected in parallel in circuit.
To measure emf you would again need a voltmeter.
So we need one ammeter and 2 voltmeter .
Additional information:-
An ammeter and a voltmeter both are made from galvanometer . To measure current a device should have minimum resistance, so for this a low resistance called shunt is connected in parallel with the galvanometer to make it a ammeter. Since in parallel combination of resistors,
[tex]\implies R_{net} < R_1 / R_2 / R_3 / .. \\[/tex]
To measure potential difference, there should be least current flowing through the device, so we add a high resistance in series with galvanometer to make it voltmeter.
and we are done!
The student will need 1 ammeter and 2 voltmeters.
Option A is correct.
What is an ammeter?An ammeter is described as an instrument used to measure the current in a circuit.
An ammeter and a voltmeter both are made from galvanometer . In order to measure current, a device should have minimum resistance, so for this a low resistance called shunt is connected in parallel with the galvanometer to make it an ammeter.
Below are some of the types of ammeter:
1-Moving coil Ammeter.
2-Moving magnet Ammeter.
3-Electrodynamic Ammeter.
4-Moving iron Ammeter.
5-Hot wire Ammeter.
6-Digital Ammeter.
7-Integrating Ammeter.
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Two small objects are suspended from threads. When the objects are moved close together, they attract one another. Which of the following could produce this result?A) One object is positively charged and the other is negatively charged.B) One object is positively charged and the other is uncharged.C) One object is negatively charged and the other is uncharged.D) All of the above could result in such attraction.
When two objects are suspended from wires, All of the above can result in such an attraction. The correct answer D.
When two objects are suspended from threads, the movement of one object close to the other can cause the electrons in the atoms of one object to be transferred to the other, resulting in one object gaining a positive charge and the other gaining a negative charge.
This causes the two objects to attract each other due to the opposite charges.
This phenomenon is known as electrostatic attraction, and it occurs due to the electrostatic force of attraction between charged objects. The strength of this force depends on the distance between the objects and the magnitude of their charges. When the objects are brought closer together, the force of attraction becomes stronger, and they may even stick together.
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A system is a simple compressible system in the absence of _____ and surface tension effects. (Select all that apply.)
-electrical
-motion
-gravitational
-magnetic
A system is a simple compressible system in the absence of electrical, motion, gravitational, magnetic and surface tension effects.
In thermodynamics, the term "state postulate" describes a set of properties that apply to a system that has achieved thermodynamic equilibrium, also It's a known as "the state principle". The state postulate stipulates that only a limited set of attributes need to be given in order to provide an exhaustive account of a state of thermodynamic equilibrium. After the state postulate has been established, the other undefined attributes are required to take on certain values.
State postulate claims "The state of a simple compressible system is completely specified by two independent, intensive properties". A system is said to as a simple compressible system in the absence of electrical, magnetic, gravitational, motion, and surface tension effects. These effects are caused by external force fields and are insignificant for the majority of engineering problems.
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The illustration shows a light ray striking an object. In the illustration, the light ray striking the object is reflecting. What is most likely true about the
object?
A
The object has a rough surface.
The object has an uneven surface.
Nothing can be determined about the surface of the object.
The object has a smooth surface.
An example of using sustainable practices in creating new products would be ______
a large company installs low-flush toilets in all of its plant and warehouse loca
an office building stops using paper products and asks workers to bring their
a tile company collects and recycles old tiles from large facilities and makes m
a large data center uses computer modeling to get rid of hot spots that waste
Answer:
"a tile company collects and recycles old tiles from large facilities and makes m"
Explanation:
While the first two sound sustainable, and they are, they're not necessarily part of creating new products. The third option where "a tile company collects and recycles old tiles from large facilities and makes m" which is cut off although I'm assuming "makes more?" making it part of the process of creating new products, although it's more sustainable as it uses old products.
Which of the following does not generate a magnetic field?
A. a moving electric charge
B. an electric current in a straight wire
C. an electric current in a wire loop
D. a stationary electric charge
Answer:
D
Explanation:
Stationary electric charges produce electric field, it's expression is given by Coulomb's Law. Moving electric charges produce electric field, it's expression is given by a more complicated form than the Columb's Law. Stationary electric charges DOES NOT produce magnetic field.
An object is dropped from a height of 23 m. At what height will its kinetic energy and its potential energy be equal?
Answer:
Hi good morning sir I am not
An object is orbiting at a distance of 10,000 km from the center of a planet. The gravitational force between the object and the planet is 10.0 N. What would the gravitational force be if the object were orbiting at a distance of 5,000 km?
A. 2.5 N
B. 5 N
C. 20.0 N
D. 40.0 N
SHOW WORK PLEASE!!
If the item were orbiting at a distance of 5,000 km, there would be a gravitational force of 40 N.
What is gravity, and how does it work?Gravitational force is the name for the force that the earth exerts on a body. Among other instances of motion caused by gravitational force are the leaves and fruits that fall from trees and land on the ground, the water that flows down rivers, and a ball that is tossed up that travels to a height before landing back on the ground.
A substance's gravitational pull is:
F = GMm / r²
Where G is the gravitational constant over all space and time,
A single object's mass is M. (the planet),
The weight of the opposing item is m.
r is the separation between the items.
F is equal to 10 N at 10,000 km.
(10 N) = GMm / (10,000 km) (10,000 km)
²
GMm=109 N km2
Whenever r is 5,000 km:
F = (10⁹ N km²) / (5000 km) (5000 km)
F = 40 N.
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find its instantaneous velocity at point a . express your answer in meters per second to two significant figures.
The instantaneous velocity of an object may be equal to its standard velocity if it has uniform velocity.
What is instantaneous velocity?The definition of instantaneous velocity is the rate of change of position over a relatively brief time period (almost zero). m/s, the SI unit of measurement. The size of the immediate velocity is known as the instantaneous speed. Although it lacks a direction, it has the same value as instantaneous velocity.
Simply said, the speed of an object at that precise moment. The definition of instantaneous velocity is "The velocity of an item in motion at a certain point in time."
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Bob and Alice both throw baseballs vertically upwards from the same starting height. Both balls take the same amount of time to go up to their maximum height. Which of the follow is true (select all that apply)A. Both Bob and Alice must have thrown the balls with the same speedB. Bob could have thrown his ball with a larger speed than AliceC. Alice could have thrown her ball with a larger speed than BobD. Both balls must have reached the same maximum heightE. Alice's ball could have reached a large maximum height compared to Bob'sF. Bob's ball could have reached a large maximum height compared to Alice's
A. "Both Bob and Alice must have thrown the balls with the same speed" and D. "Both balls must have reached the same maximum height" are true statements.
When two objects are thrown vertically upwards with the same starting height and take the same amount of time to reach their maximum height, it can be concluded that both objects were thrown with the same speed, as their time of flight is dependent on their initial velocity. Additionally, since they started from the same height, their maximum height must also be the same.
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object a has a charge of 12 c, and object b has a charge of 16 c. which statement is true about the electric forces on the objects? (a) f : ab 5 23f : ba (b) f : ab 5 2f : ba (c) 3f : ab 5 2f : ba (d) f : ab 5 3f : ba (e) f : ab 5 f : ba (f) 3f : ab 5 f : ba
The statement regarding the electric forces on the objects is true: f: ab 5 2f: ba.
What alteration boosts the electric force?As the space between two charged items grows, so do the electric forces between them. With more charge on the objects, there are greater electric forces between the charged things. Each object's charge has a direct impact on electrostatic force. Therefore, if the charge of one object is doubled, the force will increase by two times.
What may be said to be true about force?There is either a push or a pull. The effects of forces include moving an object, altering its speed, altering its shape, or changing the volume of a body.
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To calculate the acceleration of an object moving in a straight line, divide the change in (blank) by the time during which the acceleration occurs.
To calculate the acceleration of an object moving in a straight line, divide the change in velocity by the time during which the acceleration occurs.
How to find acceleration ?The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.
To calculate acceleration, you need to divide the change in velocity (delta v) by the change in time (delta t) during which the acceleration occurs. The formula for acceleration is a = Δ v / Δ t.
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Which of the following changes to the Earth's sun system would reduce the magnitude of the force between them to 1/4 The value found in part a
When the distance between earth and sun becomes double, the force between them reduces to 1/4th.
What is gravity?Gravity is a fundamental interaction in physics that causes all objects with mass or energy to attract one another. The weakest of the four fundamental interactions is gravity, by a wide margin.
At the macroscopic level, gravity is the most important interaction between things and governs the motion of planets, stars, galaxies, and even light.
When the distance between earth and sun becomes double, the force between them reduces to 1/4th.
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JustAnswer JustAnswer
the answer it letter b for your question
What are centripetal acceleration and centripetal force?derive their equations.
Answer:
Explanation:
Centripetal acceleration is the acceleration that points towards the center of a circular path and is responsible for keeping an object moving in a circular path. The equation for centripetal acceleration is:
a_centripetal = v^2 / r
where v is the speed of the object and r is the radius of the circular path.
Centripetal force is the force that acts on an object moving in a circular path and is directed towards the center of the circular path. It is equal to the product of the mass of the object and its centripetal acceleration. The equation for centripetal force is:
F_centripetal = m * a_centripetal
where m is the mass of the object.
Help with Part 1 and 2
I want to check my work and graph
The point t = 0 to t = 8 depict the acceleration of the object.
What is acceleration?Acceleration is a measure of the change in velocity of an object over time. It is a vector quantity that describes the rate at which an object changes its speed or direction of motion. Acceleration is calculated as the rate of change of velocity, and is expressed in units of meters per second squared (m/s²).
We can see from the graph that between t = 0 and t =8 was the time that the object underwent acceleration.
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What is the acceleration of a 2,500-kg single-engine airplane just before takeoff when the thrust of its engine is 500N?
The acceleration of a 2,500-kg single-engine airplane just before takeoff when the thrust of its engine is 500N is, 0.2 m/s²
What is acceleration ?Acceleration is a vector quantity that describes the rate at which an object changes its velocity. It is the rate at which the velocity of an object changes in magnitude or direction, or both. In other words, it tells us how quickly an object is speeding up or slowing down. Acceleration has units of meter per second squared (m/s²) and its direction is the same as the direction of the change in velocity.
The net force acting on the airplane just before takeoff is equal to the thrust of the engine,
which is 500 N, minus the force of drag.
Since the airplane is just about to take off, the force of drag is relatively small,
So we can assume that the net force is equal to the thrust of the engine.
F = m x a
Where F is the net force, m is the mass, and a is the acceleration.
Substituting the values for F and m, we get:
500 N = 2,500 kg x a
Dividing both sides by 2,500 kg, we get:
a = 500 N / 2,500 kg = 0.2 m/s²
So, the acceleration of the 2,500-kg single-engine airplane just before takeoff when the thrust of its engine is 500 N is 0.2 m/s².
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A 53-years old lady was found by imaging to have 50% narrowing in her left renal artery. The change in blood flow for that artery is: (poiseuille Law)
A. 1⁄3 reduction in flow
B. 1⁄2 increase in flow
C. 1/16 increase in flow
D.1/16 reduction in flow
Answer:
D. 1/16 reduction in flow
Explanation:
Poiseuille's law says that the flow rate in a tube or pipe is:
[tex]Q=\frac{\pi P r^4}{8 \eta L}[/tex]
where P is the pressure difference, r is the radius, η is the viscosity, and L is the length.
Assuming that P, η, and L are constant, then we can say Q is proportional to r⁴.
Q ∝ r⁴
A 50% narrowing means the new radius is r/2. Thus the new flow is:
Q₀ / r⁴ = Q / (r/2)⁴
Q₀ / r⁴ = 16 Q / r⁴
Q = Q₀ / 16
There is a 1/16 reduction in flow.
Lightning A cloud has a large positive charge. Assume that this is the only cloud in the sky over Earth and that Earth is a good electrical conductor. Draw a sketch showing elec- tric charge distribution on Earth due to the cloud’s electric charge. Explain why a person’s hair might stand on end be- fore a lightning strike.
The cloud has a positive charge. This positive charge entices a negative charge in the Earth. So the part of Earth that is close to the cloud has a negative charge and the distant part has a positive charge.
A person on earth has electric charges, like the Earth. On the end, before lightning strike cloud and earth have the utmost charge that they can carry. So in this time, the person has a large stake of charge like when he or she skims a Van De Graaff. The hair is placed on end when strands have the exact charge because of the repulsive electric force between them. Likewise, before the lightning strike, the person's hair might be placed on end.
Therefore, before a lightning strike person has a great stake of charge like when he or she adjoins a Van De Graaff.
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A diagram showing electric charge distribution on Earth due to the cloud's electric charge.
When a rattlesnake strikes, its head accelerates from rest to a speed of 22 m/s in 0.63 seconds. Assume for simplicity that the only moving part of the snake is its head of mass 120 g.
How much (average) power does the rattlesnake need to accelerate its head that fast?
Answer in units of W. Answer in units of
W.
Answer:183
Explanation:when you have taken 120g and 22m/s in 0.63 the acceleration has the speed of 183
If a force of 160 ± 6 N is applied to an area of 24 ± 3 cm², determine the pressure and the uncertainty in its calculation?
Answer:
Explanation:
The pressure is calculated by dividing the force by the area:
P = F / A = 160 N / 24 cm² = 6.67 N/cm²
The uncertainty in the calculation of pressure can be determined by propagating the uncertainties in the force and area measurements. According to the formula for uncertainty propagation, the fractional uncertainty in the pressure calculation is:
ΔP / P = √((ΔF / F)^2 + (ΔA / A)^2)
Plugging in the values:
ΔP / P = √((6 N / 160 N)^2 + (3 cm² / 24 cm²)^2)
ΔP / P = √(0.0375) = 0.195
So the fractional uncertainty in the pressure calculation is 0.195 or 19.5%.
To find the absolute uncertainty in the pressure, multiply the fractional uncertainty by the pressure:
ΔP = P * ΔP / P = 6.67 N/cm² * 0.195 = 1.29 N/cm²
So, the pressure is 6.67 ± 1.29 N/cm².
In order to find the depth of a well, you drop a stone into it and time its fall. It hits the water after falling for 1.7s the depth of the well is about _____.
If the stone hits the water in the well after falling for 1.7s then the depth of the well is about 14.16m.
The time required by the stone to fall and reach the bottom of the well is 1.7s.
Now, we know from the equation of motion,
H = ut + 1/2at²
Where,
H is the depth of the well,
u is the initial speed of the well that is zero in our case,
t is the time taken by the stone to hits the water.
Now, putting all the values,
H = 0.5 x 9.8 x 1.7 x 1.7
H = 14.16 m.
The depth of the well is 14.16m.
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Two students are discussing the motion of the dart-block system at the instant it reaches height H. The students make the following statements:Student 1: The speed of the system at height H is zero. Since it is moving in circular motion and centripetal acceleration is given by ac = v2 , the acceleration must also be zero.Which underlined phrase or phrases, if either, are correct about student 1's statement? If neither phrase is correct, write "none."
The underlined phrase "The speed of the system at height H is zero", "Since it is moving in circular motion and centripetal acceleration is given by ac = v², the acceleration must also be zero" are both underlined phrases are not correct about student 1's statement.
The underlined phrase "The speed of the system at height H is zero" is not correct about student 1's statement. The statement is incorrect because at the instant it reaches height H, the system would have lost some of its initial kinetic energy due to gravity and would be moving with some velocity, though it could be very small.
The underlined phrase "Since it is moving in circular motion and centripetal acceleration is given by ac = v², the acceleration must also be zero" is also not correct about student 1's statement. The statement is incorrect because the centripetal acceleration is not given by ac = v², but rather ac = v2/r, where r is the radius of the circular path.
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Which of the following are considered to be price discrimination? (Select all that apply.)
Giving seniors a breakfast discount at the local diner.
Providing a bulk discount for school supplies to local school districts.
Charging schoolchildren half-fare for subway or bus transport.
Charging less for phone services in one location to drive out a competitor.
Charging less for phone services in one location to drive out a competitor is considered to be price discrimination.
What is price discrimination?A selling tactic known as price discrimination involves charging clients various rates for the same good or service depending on what the vendor believes they can persuade the customer to accept.
When a merchant uses pure price discrimination, they charge each consumer the highest price they will agree to.
In more prevalent types of price discrimination, the supplier divides clients into groups based on particular characteristics and assesses a different price to each group.
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