Flow switches are used to detect the movement of air, but not liquid, through a duct or pipe.
Answers
Flow switches are devices specifically designed to detect the movement of air or other gases through a duct or pipe. They are typically used in HVAC systems, industrial processes, and ventilation systems to monitor airflow and ensure proper operation.
Flow switches work on the principle of differential pressure. They consist of a sensing element, such as a paddle or vane, that is placed in the airflow path. When there is sufficient air movement, the flow exerts a force on the sensing element, causing it to move or rotate. This motion is then detected by a switch mechanism inside the device, which changes the electrical state of the switch contacts.
The key feature of flow switches is their ability to distinguish between the flow of air and the flow of liquid. This is achieved through the design and configuration of the sensing element. The sensing element is specifically designed to be sensitive to the low-density and low-viscosity characteristics of air, while being less responsive to the denser and more viscous nature of liquids.
By utilizing this design, flow switches can accurately detect and monitor the movement of air while disregarding liquid flow. This feature is important in applications where it is necessary to differentiate between the two, such as preventing false alarms or protecting equipment from damage caused by liquid flow.
Overall, flow switches provide a reliable and efficient method for detecting the movement of air in ducts and pipes, offering valuable control and monitoring capabilities in various industrial and HVAC applications.
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Related Questions
A student pulled a 100 kg cart up a ramp using a force of 150 N. By the time the cart reached the top of the ramp, it had gained 980 joules of potential energy. What happened to the work the student did by pulling the cart?
Answers
Answer:
Some of the work done on the cart became the cart’s potential energy, and some of the work was converted into heat by friction.
Explanation:
Here, some fraction of the work done by the student on the cart is converted to the potential energy of the cart it gained at the height.
What is work done ?Work done is the measure of the effectiveness of the force on making some displacement. It is the dot product of force and displacement. Work done like force is a vector quantity and have magnitude and direction.
When a force applied on a body results in a displacement, then it is said to be work is done on the body. The work done is numerically equal to the energy needed to displace the object.
Here, the force applied on the cart of 100 Kg results in a work done on the cart by pulling it to height. Where the energy equivalent to the work done is stored in the form its potential energy. The potential energy
p = mgh
Some fraction of work done is stored as this energy while the remaining probably lost into the surroundings.
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a mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. it takes 3.1 j of work to compress the spring by 0.13 m . if the spring is compressed, and the mass is released from rest, it experiences a maximum acceleration of 12 m/s2.find the value of the spring constant.
Answers
From conservation of energy, the spring constant is of magnitude 367 N/m.
How is Hooke's Law Stated ?Hooke's law state that the extension in an elastic material is directly proportional to the force applied provided that the elastic limit is not exceeded.
Given that a mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. it takes 3.1 j of work to compress the spring by 0.13 m . if the spring is compressed, and the mass is released from rest, it experiences a maximum acceleration of 12 m/s².
The given parameters are;
Extension e = 0.13 mWork done W = 3.1 Jacceleration a = 12 m/s²spring constant k = ?The elastic potential energy = work done = 3.1
1/2ke² = 3.1
1/2 × k × 0.13² = 3.1
0.5k × 0.0169 = 3.1
0.00845k = 3.1
k = 3.1/0.00845
k = 366.86 N/m
k = 367 N/m
Therefore, the value of the spring constant is 367 N/m approximately.
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A wave has a wavelength of 0.5 meters and a frequency of 120 Hz. What is the wave’s speed?
Answers
Answer:
60 m/s
Explanation:
v = ?
lamda = 0.5 m
f = 120 Hz
v = 120 × 0.5
v = 60 m/s
The wave moves at a speed of 60 m/s at the specified wavelength and frequency.
What is the Wavelength?A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. Its length is typically defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm) (mm).
The wavelength is more frequently described in nanometers (nm), which are quantities of \(10^-^9 m\), or angstroms (), which are units of \(10^-^1^0 m\), for infrared (IR), visible light (UV), and gamma radiation ().
For above given example,
Wavelength is equal to 0.5 metres and frequency is equal to 120 hertz.
The general wave equation is applied to determine the wave's speed as illustrated below;
v = fλ
where; The wave's speed is v.
v = 120 x 0.5
v = 60 m/s
Thus, the wave moves at a speed of 60 m/s at the specified wavelength and frequency.
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Water travels, in a 2km long pipeline at a maximum flow rate of 0.12 m/s. The internal diameter of the pipe is 300 mm, pipe wall thickness is 5 mm, and is manufactured from steel with a Young's modulus of 210x109 Pa. The pipeline is constructed within an excavated trench and surrounded by backfill material. A control valve on the downstream end of the pipeline uniformly closes in 12 seconds. (a) Calculate the pressure transients at the mid-point of the pipeline (b) How does friction in pipeline effect the calculated (in Q6 (a)) pressure transients
Answers
(A) The pressure transients at the mid-point of the pipeline are approximately 1,208,277 Pa.
(B) Friction in the pipeline affects the calculated pressure transients by increasing the overall resistance to flow
(a) The pressure transients at the mid-point of the pipeline can be calculated using the water hammer equation. Water hammer refers to the sudden changes in pressure and flow rate that occur when there are rapid variations in fluid flow. The equation is given by:
ΔP = (ρ × ΔV × c) / A
Where:
ΔP = Pressure change
ρ = Density of water
ΔV = Change in velocity
c = Wave speed
A = Cross-sectional area of the pipe
First, let's calculate the change in velocity:
ΔV = Q / A
Q = Flow rate = 0.12 m/s
A = π × ((d/2)^2 - ((d-2t)/2)^2)
d = Internal diameter of the pipe = 300 mm = 0.3 m
t = Pipe wall thickness = 5 mm = 0.005 m
Substituting the values:
A = π × ((0.3/2)^2 - ((0.3-2(0.005))/2)^2
A = π × (0.15^2 - 0.1495^2) = 0.0707 m^2
ΔV = 0.12 / 0.0707 = 1.696 m/s
Next, let's calculate the wave speed:
c = √(E / ρ)
E = Young's modulus of steel = 210x10^9 Pa
ρ = Density of water = 1000 kg/m^3
c = √(210x10^9 / 1000) = 4585.9 m/s
Finally, substituting the values into the water hammer equation:
ΔP = (1000 × 1.696 × 4585.9) / 0.0707 = 1,208,277 Pa
Therefore, the pressure transients at the mid-point of the pipeline are approximately 1,208,277 Pa.
(b) Friction in the pipeline affects the calculated pressure transients by increasing the overall resistance to flow. As water moves through the pipe, it encounters frictional forces between the water and the pipe wall. This friction causes a pressure drop along the length of the pipeline.
The presence of friction results in a higher effective wave speed, which affects the calculation of pressure transients. The actual wave speed in the presence of friction can be higher than the wave speed calculated using the Young's modulus of steel alone. This higher effective wave speed leads to a reduced pressure rise during the transient event.
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PLEASE HELP ME ASAP
Why are there plateaus on a heating curve?
A. The plateau represents when a substance changes directly from a solid to a gas.
B. The plateau represents the change of a substance from one phase to another where temperature does not increase.
C. The plateau represents when a substance changes from liquid to gas.
D. The plateau represents when there is a temperature increase in a substance.
Answers
According to the evolution of a heating curve, the correct option is B. The plateau represents the change of a substance from one phase to another where temperature does not increase.
What is a heating curve?
Heating curves are graphic representations of the relationship between a substance being heated or cooled and their changes in state as the temperature reaches certain values or rates.
In general,
the Y ax represents temperaturethe X ax represents either time or heatthe curve represents the substance being heated or cooled and its change in state.Let us assume a solid substance is absorbing heat. The evolution of the curve will be as follows,
1) As temperature increases, the substance will absorb heat but it will not change in state. The curve will proportionally grow.
2) At a certain temperature, the substance will change from solid to liquid. At this point, the temperature will remain the same, but for a period, the substance will keep changing to the liquid phase. This is a plateau.
3) As temperature increases, the liquid will gain heat, but the substance will still be liquid. The curve will proportionally grow.
4) The substance will gain heat until temperature reaches a new transition value in which liquid initiates evaporation. At this point, there is a new plateau.
If temperature decreases, the process will be inverse. The substance will get cooled and will pass from gassy state to liquid and then from liquid to solid again.
For a better understanding, you will find a heating curve in the attached files.
The correct option is B. The plateau represents the change of a substance from one phase to another where temperature does not increase.
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Answer: d
Explanation:
A car traveling at 15m/s on a flat surface turns in a circle with a radius of 25m.What is the centripetal acceleration of the car?
Answers
ANSWER
\(9m\/s^2\)EXPLANATION
To find the centripetal acceleration, we have to apply the formula for centripetal acceleration:
\(a=\frac{v^2}{r}\)where v = velocity of the vehicle
r = radius of the circular path
Therefore, the centripetal acceleration is:
\(\begin{gathered} a=\frac{15^2}{25} \\ a=9m\/s^2 \end{gathered}\)That is the answer.
SELECT ALL of the TRUE statements about voltage:
Voltage is like water pressure in a pipe.
Voltage is what "pushes" electrons through a circuit
Voltage is the potential difference between (+) and (-) charges
Assuming the resistance in a circuit stays the same, the greater the voltage, the more current can flow through a circuit.
Answers
Answer:
All of the above
Explanation:
I saw this on an EdPuzzle.
You kicked a ball on a level surface at 30° and 45° with the same total speed as shown below.
45° 30°
Which launch angle causes the ball to travel further horizontally before hitting the ground?
Answers
45° angle causes the ball to travel further horizontally distance before hitting the ground
Range= distance
Range=u²sin2θ/g
for 30°
Range= -0.3u²/g
for 45°
Range=0.89u²/g
clearly 45° velocity will move farther.
Distance, which is independent of direction, is the length between two points or things. Distance solely considers the overall magnitude and disregards the start and finish places because it is a scalar attribute. Distance can only have a positive or zero value because it is a scalar attribute; it cannot be negative.
The meter (m) is the most widely used unit of measurement for distance, however kilometers (km) can also be used to describe longer distances and centimeters (cm) or millimeters can be used to express shorter distances (mm). The distance traveled is frequently represented by the letter D when computing distance.
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When the same amount of heat is added to equal masses of water and copper at the same temperature, the copper is heated to a higher final temperature than the water. On a molecular level, what explains this difference?
Answers
On a molecular level, the difference in the specific heat capacity of water and copper explains why copper is heated to a higher final temperature than water when the same amount of heat is added to equal masses of both substances at the same temperature.
Specific heat capacity is the amount of heat required to raise the temperature of a substance by one degree Celsius per unit mass.
Copper has a lower specific heat capacity than water, meaning that it requires less heat to raise its temperature by one degree Celsius than water does. As a result, when the same amount of heat is added to equal masses of water and copper, the temperature of copper increases more rapidly than that of water. This is because copper can absorb the same amount of heat more efficiently than water, which leads to a higher final temperature for copper than water.
Therefore, The difference in the specific heat capacity of water and copper on a molecular level explains why copper reaches a higher final temperature than water when the same amount of heat is added to equal masses of both substances at the same temperature.
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John has a utility function of the following: UL, C) = L ^BC ^(1-ẞ), where L is leisure and C is consumption. If he works, he receives a real wage w. Outside of the labor market, he has nonlabor market income V. And his endowment of time T is normalized to 1. And the price of goods p is also normalized to 1.
(a) Please write down his budget constraint.
(b) Assuming ẞ = 1/2, V = 100, w = 200, what is his optimal supply of labor?
(c) How much total income does he have?
(d) How much consumption will he make?
(e) Now, consider the case where John is subject to a 10% income tax on labor income only. What is his new optimal supply of labor?
Answers
(a) The budget constraint can be written as: C = wL + V, where C is consumption, w is the real wage, L is leisure, and V is non-labor market income.
(b) With ẞ = 1/2, V = 100, and w = 200, John's optimal supply of labor cannot be determined without information about his preferences for leisure and consumption. The utility function only represents his preferences, but we need additional information to determine the specific amount of labor he would choose to supply.
(c) John's total income is the sum of his labor income and non-labor market income: Total income = Labor income + Non-labor income = wL + V. Without knowing the specific value of L, we cannot calculate the total income.
(d) Similarly, without knowing John's preferences for leisure and consumption, we cannot determine the specific level of consumption he would choose.
(e) In the case where John is subject to a 10% income tax on labor income only, his new optimal supply of labor would depend on the tax rate's impact on his preferences and the trade-off between leisure and consumption. Without further information on his preferences and the specific tax structure, we cannot determine the new optimal supply of labor.
Additional information about John's preferences for leisure and consumption, as well as the specific tax structure, is necessary to calculate his optimal labor supply, total income, consumption, and the impact of the income tax on his labor supply.
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1. A car starts from the rest on a circular track with a radius of 300 m. It accelerates with a constant tangential acceleration of a = 0.75 m/s?. Determine the distance traveled and the time elapsed"
Answers
Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.
To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.
The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).
Using the equation:
v = v₀ + at
where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:
v = 0 + (0.75 m/s²) * t
v = 0.75t m/s
The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:
v = ωr
Substituting the values:
0.75t = ω * 300
Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:
ω = ω₀ + αt
ω = 0 + (0.75 m/s²) * t
ω = 0.75t rad/s
We can now substitute the value of ω into the equation:
0.75t = (0.75t) * 300
Simplifying the equation gives:
0.75t = 225t
t = 0.75 seconds
The time elapsed is 0.75 seconds.
To calculate the distance traveled (s), we can use the equation:
s = v₀t + (1/2)at²
Since the initial velocity (v₀) is zero, the equation becomes:
s = (1/2)at²
s = (1/2)(0.75 m/s²)(0.75 s)²
s = (1/2)(0.75 m/s²)(0.5625 s²)
s = 0.2119 meters or approximately 21.19 centimeters
Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.
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Suppose you ran 2km in 10min. With what speed did you run?
Answers
You ran at a speed of 12 km/h.
To calculate the speed at which you ran, we need to use the formula: speed = distance / time. In this case, the distance you ran is 2km and the time it took you is 10 minutes.
First, we need to convert the time to hours as the distance is given in kilometers per hour.
10 minutes = 10/60 hours = 0.1667 hours
Now we can substitute the values in the formula:
speed = distance / time = 2km / 0.1667 hours
This gives us a speed of approximately 12 kilometers per hour (km/h). Therefore, you ran at a speed of 12 km/h.
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5. Many Canadian power plants run slightly more efficiently in winter than in summer. Explain why this should be expected.
Answers
Canadian power plants tend to run slightly more efficiently in winter than in summer due to the lower ambient temperature, which allows for improved heat transfer and reduces losses in the power generation process.
The efficiency of a power plant refers to the ratio of useful energy output to the total energy input. In the case of thermal power plants, such as coal or natural gas-fired plants, the efficiency is closely related to the temperature difference between the heat source (combustion) and the heat sink (cooling).
During winter in Canada, the ambient temperature is significantly lower than in summer. This lower temperature provides a more favorable temperature gradient for heat transfer in the power plant's systems, including the heat exchangers and condensers. Improved heat transfer efficiency allows for a more effective extraction of heat from the combustion process, resulting in higher thermal efficiency.
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Which country has more nuclear power stations, the UK or France?
Answers
Answer: FRANCE
Explanation:
Answer:
France
Explanation:
UK has 15 nuclear power plants and 2 under construction whereas France has 56 in operation and 1 under construction
HELP HELP HELP HELP HELP HELP HELP HELP
IM SO SAD ANF SUCH A FAILLURE
Answers
Answer:
48W
Explanation:
Ok so, the power formula is P= V*I. I plugged in the voltage and current to get P=(6V)(8A).
A.) P=48W.
B.) Knowing this, It isn't working correctly. It's supposed to be 60W but it's 45W.
There must be some type of resistor throwing it off or something but the answer is no!
hope this helps!!
true/false. the body of a for loop will contain one statement for each element of the iteration list.
Answers
False. The body of a for loop does not necessarily need to contain one statement for each element of the iteration list. In a for loop, the body is executed once for each element in the iteration list.
However, the body can contain multiple statements, including conditional statements, function calls, or any other valid code. It is common to have multiple statements within the body of a for loop to perform different actions or computations for each iteration. The number of statements within the loop body depends on the specific requirements of the program and the desired functionality. The body of a for loop does not necessarily need to contain one statement for each element of the iteration list. In a for loop, the body is executed once for each element in the iteration list.
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A car in front of the school goes from rest to 27 m/s in 3.0 seconds. What is its acceleration (assuming it is constant)?
Answers
Answer:
81 miles per hour
Explanation:
To get the answer, you should multiply 27 by 3, you should multiply distance by time to get the speed.
Answer:
9 m/s²
Explanation:
´Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.´
how would a planet move if the sun suddenly disappeared ?
Answers
Explanation:
The sun gravity keeps the solar system i.e planets in its place and orbits if there is no sun the planets would flying off and It would be complete and utter chaos in our solar system
During a canoe trip camper paddles distance of 406 M and 70 seconds what is the average speed of the canoe
Answers
Answer:
The average speed is 5.8 m/s
Explanation:
I just did it
A naval station sees waves with 5.6 meters between crests, and these waves hit the station every 4.25 seconds.
What is the speed of these water waves??
Answers
Answer:
the formula v = f×lambda.
v= 4.25× 5.6
therefore speed is
23.8 meters per second
what angle is formed by the sun, earth, and moon during an eclipse?
A.180 degree
B.270 degree
C.90 degree
D.45 degree
Answers
Which statements about water are true? Choose more than one answer.
Water molecules have no subatomic particles
Water does not appear on the periodic table of elements
Water molecules contain a lot of empty space
Molecules of water cannot be broken apart
Hydrogen and oxygen have different properties when separated
Every molecule of water contains two atoms of oxygen
Answers
water is not found in the periodic table.
water has a lot of empty space.
I think that's it I know those to are true.
The statements that are true about water are as followings,
Water does not appear on the periodic table of elements.
Water molecules contain a lot of empty space.
Hydrogen and oxygen have different properties when separated.
Therefore the correct options are options B, C, and E.
What is a Chemical compound?A chemical compound is a combination of two or more either similar or dissimilar chemical elements.
For example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.
The periodic table contains only elements therefore water cannot be found on the periodic table , oxygen and hydrogen would have different properties when separated.
Thus , the correct options are B, C, and E.
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The moon is 384,403 km from the earth how many quarters laid end to end it would take to reach the moon if a quarter has a diameter of 2.3 cm
Answers
Answer:
Distance from the moon= dm= 384,403km
A quarter diameter= dq= 2.3 cm= 0.000023km
No of quarters= 16,713,173, 913
To convert cm into km divide cm by 100 and then by 1000
as
1m= 100cm
1km= 1000m
Therefore
2.3/100= 0.023 m
And
0.023/1000= 0.000023 km
Dividing the distance from the moon by the diameter of the quarter laid end to end would give the number of the quarters needed.
No. of quarters= Distance from the moon/ Diameter of the quarter
= 384,403km/0.000023 km
= 16,713,173,913.043
Rounding 16,713,173,913.043 gives 16,713,173,913 quarters
Explanation:
Brainliest, please!
The height of a transverse waves is known as its?
Answers
Answer:
amplitude
Explanation:
wave is a called the crest, and the low point is called the trough. For longitudinal waves, the compressions and rarefactions are analogous to the crests and troughs of transverse waves. The distance between successive crests or troughs is called the wavelength. The height of a wave is the amplitude.…
If you measure the average brightness and pulsation period of a cepheid variable star, you can also determine its?
Answers
If you measure the average brightness and pulsation period of a cepheid variable star, you can also determine its distance.
Cepheid variable stars belong to a class of stars that have a distinct relationship between variation period and luminosity.
Their period of cycle and luminosity are closely related to each other and they differ in temperature and diameter.
As their brightness increases and decreases, therefore, it helps out in the measurement of intergalactic and interstellar distances.
The changes in amplitude of their motion and cycle period have a definite impact on their brightness which enables us to determine their distance.
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Page is
An aircraft accelerates from the
rest at 25m/s it’s take- off
Speed is 60m/s. What length
Of runway does it need to take off?
Answers
Answer:
72 m
Explanation:
Given:
v₀ = 0 m/s
v = 60 m/s
a = 25 m/s²
Find: Δx
v² = v₀² + 2aΔx
(60 m/s)² = (0 m/s)² + 2 (25 m/s²) Δx
Δx = 72 m
Write a claim that responds to the question: Why can transferring energy into or out of a substance change molecules’ freedom of movement? Be sure to include the words kinetic energy, temperature, and speed in your response.
Answers
The claim can be that, Kinetic energy refers to the perpetual motion of molecules in a material.
A molecule's temperature and speed are exactly related to how much kinetic energy it has. Molecules acquire more kinetic energy when energy is introduced into a substance by heating, which causes them to move more quickly and raise temperature. This rise in temperature and speed may cause more frequent collisions and increased movement among molecules.
While molecules lose kinetic energy when energy is transported out of a substance through cooling, which causes them to travel more slowly and drop in temperature. The molecules may travel more slowly and experience fewer collisions as a result of the drop in temperature and speed. As a result, the freedom of motion of a substance's molecules can be significantly impacted by the passage of energy into or out of it.
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Which process is represented inside of the dashed circle?
Evaporation
Condensation
Precipitation
Transpiration
Answers
A boat accelerates from 8.5 m/s west to 1.8 m/s west at a rate of 2.9 m/s^2 east. How far does it travel
Answers
The distance traveled while accelerating can be found by multiplying the average velocity by the time taken to accelerate
Complete question:
A boat accelerates from 8.5 m/s west to 1.8 m/s west at a rate of 2.9 m/s^2 east. How far does it travel while accelerating?
Computation of DistanceThe average velocity is the difference between the initial and final velocities, divided by two. The time taken to accelerate is the difference between the initial and final velocities, divided by the rate of acceleration.
Given Data
Average velocity = (8.5 m/s - 1.8 m/s) / 2 = 3.35 m/sTime taken to accelerate = (8.5 m/s - 1.8 m/s) / 2.9 m/s^2 = 2.03 swe know that the expression for computing distance is given as
Distance traveled while accelerating = Average velocity * Time taken to accelerate
Substituting our data in the expression we have
Distance traveled while accelerating = 3.35 m/s * 2.03 s = 6.80 m
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Radar waves of wavelength 50 mm are emitted from two aerials and create a fringe pattern 1 kilometer from the aerials. Calculate the distance between the aerials if the fringe spacing is 80 cm.
Answers
If the fringe spacing is 80 cm, the distance between the aerials is 6.25 meter.
What is interference?In physics, interference refers to the combined result of two or more wave trains travelling along intersecting or converging trajectories. The result is the result of adding the individual wave amplitudes at each place that is influenced by multiple waves.
Given: wavelength = 50 mm = 50 × 10⁻⁴ m
the fringe spacing is = 80 cm = 0.80 m.
x = λD/d
d = λD/x
= 50 × 10⁻⁴ × 1000/0.80 m
= 6.25 meter.
Hence, the distance between the aerials is 6.25 meter.
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