83.33ms-² is the rocket's acceleration
a = 10,000–5,000/(60)
a=5,000/60
a=83.33ms-²
What are the requirements for rocket propulsion?Fuel and an oxygen supply, known as an oxidizer, are combined and blasted in a combustion chamber of a rocket engine. The combustion process generates hot exhaust, which is directed through a nozzle to accelerate the flow and generate thrust.
Propulsion is the application of a force to modify the velocity of a vehicle, influencing both its speed and direction. This force is commonly referred to as thrust in aeronautical vehicles.
Today, liquid hydrogen is the American space program's hallmark fuel, and it is employed by other countries in the satellite launch sector. Boeing's Delta III and Delta IV now include liquid-oxygen/liquid-hydrogen upper stages, in addition to the Atlas.
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A soda bottle rolls off the horizontal desk with velocity of 0.14 m/s. If it took the can 0.85 s to hit the floor, how from the desk did the can land?
The Distance from the desk the can landed when it rolls off the horizontal desk with a velocity of 0.14 m/s is 3.66 m.
What is distance?Distance is the total lenght between two points.
To calculate how far (Distance) from the desk the can landed, we use the formula below.
Formula:
R = ut+gt²/2.......... Equation 1Where:
R = Distance of the can from the desku = Initial velocity of the cant = Timeg = Acceleration due to gravity.From the question,
Given:
u = 0.14 m/st = 0.85 sg = 9.8 m/s²Substitute these values into equation 1
R = (0.14×0.85)+(9.8×0.85²)/2R = 0.119+3.54025R = 3.66 m.Hence, The distance from the desk at which the can land is 3.66 m.
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84 g of a metal at an initial temperature of 72°c releases 553 j of heat. Calculate the final temperature of the metal if its specific heat capacity is 0. 13 j/g⋅k.
Answer:
Q = 553 J = c M ΔT heat released
ΔT = Q / (c * M)
ΔT = 553 J / (.13 J/g-K * 84 g) = 50.6 K change in temperature
72 - 50.6 = 21.4 deg K final temperature os metal
most elements are produced through processes in stars. explain what processes would produce elements lighter than lead and what processes would produce heavier elements.
The s-processes produce elements lighter than lead and the r-processes would produce heavier elements.
Most of the elements are produced through processes in the stars. There are two types of processes the r-process and the s-process. In r-process, a heavy atom captures the nearby neutron, it can transfer to heavier isotope or element. And when this happens multiple times to an atom, heavy elements are produced. Thus, r-processes would produce heavier elements.
The s-process is slower. It uses neutron capture and the subsequent decay of that neutron into a proton resulting in formation of the lighter elements. Thus s-processes produce elements lighter than lead.
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Rather than cleaning your room, you decide to drop unwanted items out of your window. If you drop your trombone out of the window and it reaches a velocity of 17.2 m/s as it hits the ground, how high up is your window?
Freefall is the state of a body that moves freely in any direction in the presence of gravity. The window is 15.01 meters above the ground.
What is a free fall ?In mechanics, freefall is the state of a body that moves freely in any direction in the presence of gravity. The planets, for example, are in free fall in the Sun's gravitational field.Assume an object body falls freely for t seconds at a final velocity v from a height h due to gravity g. It will move according to the equations of motion: h=[tex]\frac{1}2gt^2[/tex]. [tex]v^2[/tex]= 2gh.A body is said to be in freefall when it moves solely under the influence of Earth's gravity. The ball's motion will be accelerated by an external force acting on it. This free-fall acceleration is also known as gravity acceleration.According to free fall,
vf = g * t
here Vf = 17.2 m/s
g = 9.8 m/s^2
then t = vf/ g = 17.2/9.8 =1.75 sec
According to free fall Equation,
Distance d = 1/2 g * t^2
d= 1/2 *9.8 * 1.75^2= 15.01 m
Window is located 15.01 m height from the Ground.
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what is the density of a woman who floats in freshwater with 4.00% of her volume above the surface? this could be measured by placing her in a tank with marks on the side to measure how much water she displaces when floating and when held under water (briefly).
You can obtain important information on this topic, such as the density of freshwater and ocean, in textbooks or online.
Pf for freshwater is 1x103 kg/m3.
Pf for seawater is 1025 kg/m3.
We may now compare the densities of the lady and the freshwater using the equation of fraction submerged, which compared the densities of both elements.
a). Pw + Pf = Fs
Put an end to the woman's density
Pw = Fs * Pf Pw = 1x103 kg/m3 * 0.96 = 960 kg/m3
Fs * Pf Fs = 1.0 - 0.04 = 0.96
Currently, the proportion of sea water is:
Fs = Pw/Ps = 960 / 1025 kg/m3 = 0.9366
Fs = 1.0 - 0.9366 = 0.0634 * 100
%v = 6.34
Density is defined as the measure of how closely a material is packed together. It is described as the mass per unit volume. D or ρ is the symbol for density. Density Formula: = m/V, where is the density, m is the object's mass, and V is its volume.
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When the mass of the ice added to the cup increases, the amount of thermal energy needed to change the temperature of the ice…..
(A) Increases
(B)Decrease
(C) Stays the same
Calculate the horizontal force that must be applied to produce an acceleration of 1.8 m/s2 for a 1.2-kg puck on a horizontal friction-free air table.
The horizontal force to be applied on the puck is 2.16 N
The horizontal force to be applied to a puck of given mass and acceleration on a friction-free table
Given:
A 1.2-kg puck is moved on a horizontal friction-free air table with an acceleration equal to that of 1.8 [tex]m/s^2[/tex]
Using Newton’s second law of motion, a body experiencing a force F gets accelerated in the direction of the force and its magnitude a is proportional to magnitude of the applied force. It also holds an inverse relation with the mass of the body m . This can be expressed as,
[tex]F = Ma[/tex]
Here, mass of the puck is 1.2kg. The acceleration is 1.8 [tex]m/s^2[/tex]
F = 1.2 x 1.8
F = 2.16 N
What is Friction ?Friction is a force that prevents the relative movement of solid surfaces, fluid layers and material elements sliding against each other. There are several types of friction:
Dry friction is a force that opposes the relative lateral movement of two solid surfaces in contact. Dry friction is divided into static friction ("stich") between non-moving surfaces and kinetic friction between moving surfaces. In addition to atomic or molecular friction, dry friction usually arises from the interaction of surface features called turgidities. Fluid friction describes friction between layers of viscous fluid moving relative to each other. Lubricating friction is fluid friction where a lubricating fluid separates two solid surfaces. Skin friction is part of the resistance, the force that prevents the movement of fluid on the surface of the body. Internal friction is a force that prevents movement between the components of a solid material during its deformation.To learn more about friction, visit;
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2. Which elements are present in Unknown Star B?
HELP MEEE PLEASEEEE!
Answer:
Explanation:
The spectrum of the planet clearly shows the presence of iron, hydrogen and sulfur.
The spectrum of the planet shows the presence of iron, hydrogen and sulfur.
What is spectrum ?A spectrum is a state that may fluctuate without gaps over a continuum and is not constrained to a particular set of values (plural: spectra or spectrums)[1]. After passing through a prism, visible light takes on a rainbow of colours, which is how the term was first used scientifically in optics. As knowledge of light increased on a scientific level, it started to encompass the entire electromagnetic spectrum. As a result, it evolved into a mapping of a variety of magnitudes (wavelengths) to a variety of attributes, including the perceived "colours of the rainbow" and other features that correspond to wavelengths outside of the visible light spectrum.
Today, analogies with spectrum are used to discuss subjects unrelated to optics.
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Describe a solid, liquid, and
gas found outdoors where
you live.
Answer:
a solid = wood
a liquid = a puddle
a gas = oxygen
Explanation:
These are three things that you can find like in my backyard
The moon is a 12% waxing crescent phase, located at a 39° angle from the sun. How many hours after sunrise with the moon rise?.
There are 2.6 hours after sunrise with the moon rise.
The new moon rises with the sunrise and the sun is on the eastern horizon. On this day, the Moon crosses the daytime sky with the Sun. There is a new moon in the sky during the day, but it is not visible from Earth. On new moon days, the moon is between the earth and the sun. at 270 degrees.
The Moon completes its crescent phase enters the third quarter of its congressional period and becomes a waning crescent until it reaches a new lunar phase to restart the cycle. And indeed, the position of the Moon around the Earth plays a role in solar and lunar eclipses. His quarter of the Moon is visible from Earth. That is, the sun-side half of the moon is visible making it look like half a pie.
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A 2 kg ball is launched upward and has a kinetic energy of 25 J. Solve for the velocity of the ball as it was launched
O 5 m/s
O 50 m/s
O 12.5 J
O 25 J
The velocity of the 2 Kg ball as it was launched, given that it has a kentic energy of 25 J is 5 m/s
How do I determine the velocity?From the question given above, the following data were obtained:
Mass (m) = 2 KgKinetic energy (KE) = 25 JVelocity (v) = ?The velocity of the ball can be obtained as illustrated below:
KE = ½mv²
Plug in the variables
25 = ½ × 2 × v²
25 = v²
v = √25
v = 5 m/s
Thus, from the calculation made above, we can conclude that the velocity is 5 m/s
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What is the smallest particle size a scientist can observe using a scanning probe microscope?
A) millimeter
B) nanometer
C) picometer
D) decimeter
The smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.
What is a unit of measurement?A recognized and accepted standard for measuring other amounts of the same sort is referred to as a unit of measurement. It is predetermined by custom or law.
As given in the problem, we have to find out what is the smallest particle size a scientist can observe using a scanning probe microscope.
1 millimeters = 1 × 10 ⁻³ meter
1 nanometer = 1 × 10⁻⁹ meters
Thus, the smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.
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A wooden beam is 6.50 m long and weighs 325 N. It rests on two supports that are 3.00 m apart. Jane weighs 575 N. She stands on the beam in the center and then walks toward one end. How close to the end can she come before the beam begins to tip?
Suki can go 0.854 meters to the end before the beam starts to tilt.
Beam length: L = 6.5 m
Beam weight: W b = 336 N
Suki's weight is W s = 590 N.
Suki stands in the middle of the steel beam and moves toward the end. Since the beam is supported by two posts that are spaced three meters apart, the distance she may go before the beam starts to lean is determined by how far she moves from the left support.
Thus;
according to formula
Wb × (3/2) = (Ws × x)
where:
Wb= Beam weight
Ws= Suki's weight
Adding the necessary values results in;
336 × 1.5 = 590 × x
x = (336 × 1.5)/590
x = 0.854 m
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The borders, or cracks, between tectonic plates are called ________.
A
lithospheres
B
synclines
C
anticlines
D
faults
A hard drive on a modern computer spins at 7200 rpm (revolutions per minute). If the drive is designed to start from rest and reach operating speed in 1.5 s, then the angular acceleration of the disk must be 2.0 x 103 rad/s2.
Please select the best answer from the choices provided
T
F
Answer:
t
Explanation:
in pedaling a bicycle uphill, a cyclist exerts a downward force of 500 n during each stroke. if the diameter of the circle traced by each pedal is 35 cm , calculate how much work is done in each stroke.
175 Newton work is done in each stroke.
we have given the data
force=500 newton
distance=0.35 m
now,
work done= force×distance
[tex][W=Fd],[=(500N)(0.35m)],[=175N][/tex]
When the force being applied causes motion, work is considered to have been completed. One example of effort being done against gravity is when a youngster kicks a ball into the air.We are aware that Work done is equal to FS cos, where is the angle formed by the force's direction and the body's displacement. We only take into account the cosine component of the force, which indicates that we only take into account the force's component that is pointing in the direction of displacement.To know more about Work done visit : https://brainly.com/question/14275315
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The force and its displacement are 300N and 400m lalong the
direction of 70° horizontal. Calculate.
Work done by the force along its direction
Work done by horizontal component
Work done by the vertical component.
work done = f.d cos x = 300* 400* cos 70 = 41040 J
Work done by the vertical component. = 281.9 x 400x cos 70 = 38563.9 J
Work done by horizontal component = 102.6 x 400x cos 70
= 14035.68 J
What is work done?To move an object, it must be converted into energy. The method of force can be used to transfer energy. Work done is the amount of energy transferred by a force to move an object.To put this concept into mathematical terms, the work W is equal to the force f multiplied by the distance d, or W = fd. When the force is applied at an angle to the displacement, the work done is W = fd cos x.The joule is the SI unit of work (J). The work done by a force of one newton causing a displacement of one meter is defined as a joule. Work is sometimes measured in newton-metres (N-m).The force and its displacement are 300N and 400m lalong the
direction of 70° horizontal.
work done = f.d cos x = 300* 400* cos 70 = 41040 J.
Work done by horizontal component = horizontal force x d cos x
horizontal force = 300 x cos 70 =300 x .342 = 102.6 N
Work done by horizontal component = 102.6 x 400x cos 70
= 14035.68 J
force by the vertical component. = 300x sin 70 =300x .939
= 281.9 N
Work done by the vertical component. = 281.9 x 400x cos 70 = 38563.9J
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A car sitting at rest begins
accelerating at 2.40 m/s² for
15.0 seconds. How far has the
car gone?
In 15 seconds, the car has travelled a distance of 270 meters.
What are the three equations of motion?
The three equations of motion are -
v = u + atS = ut + 1/2at²v² - u² = 2aSGiven is a car at rest which begins accelerating at 2.4 m/s² for 15 s.
From the given data, we can write -
[u] = 0 m/s
[a] = 2.4 m/s²
[t] = 15 s
We will use the second equation of motion to find how far the car has gone.
S = ut + 1/2at²
Substituting the values, we get -
S = 0 x 15 + 0.5 x 2.4 x 15 x 15
S = 0.5 x 2.4 x 15 x 15
S = 270 meters
The car has travelled 270 meters.
Therefore, in 15 seconds, the car has travelled a distance of 270 meters.
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In the Van de Graaff generator, the rollers are made of nylon and polythene.
If the rollers were made of nylon and silk, will the Van de Graaff generator work?
Discuss.
In the Van de, Graaff generator is a rubber belt stretched over two pulleys. At the bottom is the drive pulley connected to the motor. In the generator above the drive, the pulley is covered with felt and the top pulley is bare plastic.
Van de Graaff Generators are devices used to generate large amounts of static electricity. Static electricity is created by an extra charge stored somewhere to keep things from moving. Fees generally don't like to accumulate in one place. They seek out opposite charges as partners and like to run away from particles with the same charge.
When switched on the dome of the Van de Graaff generator is charged positively or negatively depending on the design. Anything that touches the dome receives the same charge. When a person has a dome, it is charged and can stand on end if the hair is long and dry enough. Most Van de Graaff generators store a positive charge in the dome by separating the negative charge from the positive charge.
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a 60 kg desk is in an elevator. the elevator (and thus the desk too) is accelerating upward at 2.2 m/s2. determine the magnitude of the normal force between the elevator floor and the desk.
720 kgf is the vertical force between the elevator floor and the desk.
Mass of table in elevator = 60 kg
Acceleration of table and elevator (upward movement) = 2.2 m/s²
To determine the vertical force between the elevator floor and table.
where:-
N = normal force between elevator floor and table
m = mass of the table
g = gravity (9.8 m/s²)
a = acceleration of table and elevator (upward motion)
N = mg + ma
N = 60 kg x 9.8 m/s² + 60 kg x 2.2 m/s²
N = 588 + 132
N = 720 kgf
∴ N=720 kgf is the vertical force between the elevator floor and the desk.
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What is the frequency of light when the energy of a single photon is 1. 48 × 10^-15 j?.
A constant called Planck's constant directly connects the energy of a photon to the frequency of vibration of a charged particle.
E=hv 1.48 x 10-15 J
= (6.626 x 10-34) (v)
v= 1.48 x 10-15 J/6.626 x 10-34
v= 2.23 x 10 18 Hz
Who defines frequency?In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles .
What is the purpose of frequency?In science and engineering, frequency is a crucial metric for describing the temporal rate of change seen in oscillatory and periodic processes.
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an x-ray tube for radiology is at 100 kv. it generates (heat) power of 30 kw. find the effective total resistance of the system
The total resistance when generating power of 30 kW is 3 x 10¯⁶ Ω.
We need to know about power to solve this problem. Power is the energy dissipated because of resistance. The magnitude of power is proportional to current and voltage. It can be determined as
P = I . V
where P is power, I is current and V is voltage.
By using Ohm's Law, power also can be calculated using resistance.
P = V² / R
where R is resistance.
From the question above, we know that
P = 30 kW = 30000 W
V = 100 kV = 100000
By substituting the following parameters, we get
P = V² / R
30000 = 100000² . R
R = 30000 / 100000²
R = 3 x 10¯⁶ Ω
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An airplane increases its speed at the average rate of 15 m/s². How much time does it take to increase its speed from 100 m/s to 180 m/s? A) 17 s B) 0.058 s C) 5.3 s D) 0.25 s
Answer:
C - 5.3s
Explanation:
a = v - u / t
so,
t = v - u / a
t = 180 - 100 / 15
t = 5.3s
you are driving your 1800 kg car at 19 m/s over a circular hill that has a radius of 150 m. a deer running across the road causes you to hit the brakes hard while right at the summit of the hill, and you start to skid. the coefficient of kinetic friction between your tires and the road is 0.75.
The The force of friction acting on the car as you apply the brake is 13,230 N and the centripetal force of the car is 4,338 N.
What is the centripetal acceleration of the car?
The centripetal acceleration of the car is calculated as follows;
ac = v²/r
where;
v is the linear speed of the car = 19 m/sr is the radius of the circular path = 150 mac is the centripetal acceleration = ?substitute the given parameters and solve for the centripetal acceleration of the car.
ac = (19²) / (150)
ac = 2.41 m/s²
The force of friction acting on the car as you apply the brake to prevent you from hitting the deer is calculated as follows;
μ = Ff/W
μ = Ff / mg
where;
Ff is the frictional forceW is the weight of the carg is acceleration due to gravityFf = μ (mg)
Ff = 0.75(1800 x 9.8)
Ff = 13,230 N
The centripetal force of the car is calculated as follows;
F = mac
F = 1800 x 2.41
F = 4,338 N
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The complete question is below;
you are driving your 1800 kg car at 19 m/s over a circular hill that has a radius of 150 m. a deer running across the road causes you to hit the brakes hard while right at the summit of the hill, and you start to skid. the coefficient of kinetic friction between your tires and the road is 0.75. Find the force of friction on the car and the centripetal force of the car.
A 2,800 g piece of metal absorbs 14,014 j of energy as it is heated from 22. 0 °c to 35. 0 °c. What is the specific heat of this metal?.
The specific heat of this metal is 0.385 j/g°C.
What is the specific heat?The Specific heat ability of a substance is the heat potential of a pattern of the substance divided by the mass of the sample, also sometimes called massic heat ability.
The specific warmth ability is defined as the quantity of warmth (J) absorbed consistently with the unit mass (kg) of the cloth whilst its temperature will increase 1 k (or 1 °C), and its gadgets are J/(kg k) or J/(kg °C).
Specific heat is described by the quantity of warmth had to increase the temperature of 1 gram of a substance 1 diploma Celsius (°C). Water has a high precise heat, which means it takes more power to grow the temperature of water compared to different materials.
heat = msΔt
s = heat/mΔt
s = 14,014 / 2,800 × 13
s = 0.385 j/g°C
Hence the specific heat of this metal is = 0.385 j/g°C
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You are trying to enter a prize drawing at the radio station but the lines are busy. You continue to call every 1-5 minutes hoping to get on the air. Which reinforcement schedule is this?.
The reinforcement schedule is this variable interval.
Shaping is the use of iterative approximation enhancements to the desired behavior. In particular, when molding techniques are used the approximate desired motion exhibited is enhanced, but the motion that is not an approximation of the desired motion is not enhanced.
Continuous reinforcement is reinforcement that is repeated each time the behavior occurs. This may involve a positive applying the stimulus or negative reinforcement with the aim of encouraging a specific behavior. Continuous enhancement is one of the two basic types of enhancement plans. Associative learning occurs when organisms associate stimuli or events that occur simultaneously in their environment.
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there are many forces that influence waves; they are classified as either generating or restoring forces. select all of the following that are generating forces.
There are many forces that influence waves; they are classified as either generating or restoring forces. The generating forces are option A, C, D and E:
WindPhysical displacementPressure differencesEarthquakesWhat are the forces that cause waves to form?Wind is the most frequent cause of waves. The friction between the wind and the surface of the water produces wind-driven waves.
Note that A wave crest is produced when wind often disturbs the water's surface in an ocean or lake. The movement of the water, gravitational pull, and wind all contribute to the formation of waves.
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Wind
Animals
Physical displacement
Pressure differences
Earthquakes
stellar equillibrium is a balance netween what two things
Stellar equilibrium is a balance between Outward pressure and inward gravity.
As long as a balance is maintained between the gravity that pulls the star inwards and the pressure that pushes it outwards, the stars are fine. During most of a star's life, its internal heat and radiation are provided by nuclear reactions in the star's core. Star balance refers to the balance of forces that exist within a star.
Stars are composed of helium gas and hydrogen gas constantly undergoing nuclear reactions in their core. The pressure of these reactions pushes out of the star. At the same time gravity is pushing the star. At the main-sequence stage of stellar evolution, the outward-pushing radiation pressure and the inward-pushing gravitational pressure are precisely balanced. In a stable star, the pressure of gas pushing away from the center is the same as the gravitational force pulling atoms toward the center.
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light from the sun with an intensity of i0i0 passes through two polarizers. initially, the angle between the polarizers is zero and then one polarizer starts to rotate. how does the intensity of the transmitted light change during one full rotation?
The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.
What is intensity?
In physics, the power transferred per unit area is known as the intensity or flux of radiant energy, where the area is measured on a plane perpendicular to the direction of the energy's propagation. Watts per square metre (W/m2) and kilogrammes per square metre (kg/s3) are the units used in the SI system. With waves like acoustic waves (sound) or electromagnetic waves like light or radio waves, intensity is most usually employed to describe the average power transfer across one period of the wave. Other situations where energy is exchanged can also be described in terms of intensity. One could, for instance, figure out how much kinetic energy each drop of water from a sprinkler is carrying.
The intensity is Io/2 after going through the first polarizer.
At some point, let the angle between the polarizers be.
The intensity is then given as after going through the second polarizer.
I = cos2(Io/2).
Cos2 is 1 at 0°, 180°, and 360° and zero at 90° and 270° because ranges from 0 to 360°. Consequently, the transmitted light's intensity I,
The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.
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a number 16 copper wire has a diameter of 1.291 mm. calculate the resistance of a 37.0 m long piece of such wire.
According to the given statement the resistance of a 37.0 m long piece of such wire is 3151Ω.
What is resistance in electric current?Resistance values are represented in ohms. When there is an electron difference between two endpoints, electricity can flow from high to low. In opposition to that flow is opposition. As critical stress intensity, the current decreases. On the other side, when the resistance decreases, the current rises.
Briefing:Copper wire's resistance (R) at 20 degrees Celsius is 1.72x10^-8Ωm.
Coil length(L) of the wire=37.0m
Cross-sectional area of the conductor or wire (A) = π²
A= π * (1.291/1000)/2=2.02*10⁻⁶
To calculate for the resistance (R):
R=ρ*L/A
R=(1.72*10⁸)*(37.0)/(2.02*10⁻⁶)
R=3150.49Ω
Approximately, R=3151Ω
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