For the given values, the acceleration of the block is 0.4 m/s2.
What is the coefficient of friction?
The friction coefficient is the ratio of the normal force pressing two surfaces together to the frictional force preventing those surfaces from moving. Typically, it is represented by the Greek letter mu (μ). In terms of math, is equal to μ = F/N, where F stands for frictional force and N for normal force.
Given the weight of the crate = 1100
Hence Mass of the crate m = 1100/9.8 = 112.245 kg
a) Since it is moving with a constant velocity, the net force acting on the block is zero
Fnet = 290cos 20 - μ*(290sin20 + 1100)
---> μ = 290cos 20/(290sin20 + 1100) = 0.227
b) Net force acting on the block = 290cos 20 - 0.227*(1100 - 290sin20) = 45.08 N
Acceleration of the block = F/m = 45.08/112.245 = 0.4 m/s2
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У Z Eright left A parallelepiped is in an electric field which, to the left of the dashed line, has the value Eleft =< -55.37,0,0 > N/C, and Eright =<55.37,0,0 > N/C to the right of the dashed line. The top and bottom of the parellelepiped are rectangles lying in the x - z plane, and measure li by l2, as shown. The left and right faces are rectangles inclined by an angle 0 = 83.48° from the a axis, and measure l2 by l3. The values of l1, l2, and l3 are 23.82 cm, 11.27 cm, and 32.48 cm, respectively. What charge is contained inside the parallelepiped?
A rectangle possesses all the characteristics of a parallelogram since it has two sets of parallel sides and two pairs of opposite sides that are congruent. A rectangle is always a parallelogram because of this.
How many edges are there on a parallelepiped?
Congruent and parallel faces are found in pairs. Eight (8) vertices and twelve (12) edges make up the parallelepiped. The parallelepiped's edges can be divided into three (3) sets of four (4) edges each, where each set's edges are parallel and all have the same length. A zonohedron is the parallelepiped as well.
How many faces are there on a parallelepiped?
A parallelepiped is a six-faced, three-dimensional structure with a parallelogram-like pattern on each face. It contains 12 edges, 6 faces, and 8 vertices. Rhomboid, cuboid, and cube are all variations on the parallelepiped.
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Question 16 of 20
A zinc atom contains 30 protons, 35 neutrons, and 30 electrons. What is the
atomic mass of zinc?
A. 65 amu
B. 95 amu
C. 60 amu
D. 35 amu
SUBMIT
Answer: 65 amu
Explanation: Proton+ Neutron
Suppose that the period is T. Which of the following points on the t axis are separated by the time interval T?
K and L
K and M
K and P
L and N
M and P
The points on the t axis separated by the time interval T are K and P.
The true choice is C.
In Physics, a period is the length of time it takes for one oscillation or one wave to occur. The symbol for the period is T with units of seconds or seconds (s).
K and P are one wave on the transverse wave. One wave is a combination of one hill and one valley. While K and M are defined as half waves.
Water waves, rope waves, and light waves. is a wave whose direction of propagation is parallel to the direction of vibration.
In longitudinal waves, one wave consists of one stretch and one density.
This question is accompanied by a picture
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PLEASE HELP
Which is not a characteristic of a reflecting optical telescope?
A) The mirrors inside the telescope do not need to be cleaned often.
B) They are easier and cheaper to create.
C) There is minimal distortion of the image.
D) The mirrors occasionally tend to get foggy.
a 0.5 kg car is moving at a constant velocity 5 m/s. What is the kinetic energy of the car?
Due to the wave nature of light, light shined on a single slit will produce a diffraction pattern. Green light (525 nm) is shined on a slit with width 0.415 mm.
(a) Find the width of the central maximum located 1.65 m from the slit.
(b) What is the width of the first order fringe?
Yes, it will produce a diffraction pattern.
a. 3.9 mm b. 1.95 mm
Explanation:
The light shined from a single slit will produce a diffraction pattern because, the wavefront act as wavelets which generates its own wave according to Huygens principle. This therefore causes the diffraction pattern.
Given
wavelength of green light, λ = 520 nm = 520 × 10⁻⁹ m = 5.20 × 10⁻⁷ m
width of slit, d = 0.440 mm = 0.44 × 10⁻³ m = 4.4 × 10⁻⁴ m
Distance of slit from central maximum , D = 1.65 m
Distance of first minimum from central maximum, y = ?
a. The relationship between the slit width and wavelength is given by [tex} dsinθ = mλ [/tex]where d = slit width, θ = angular distance from central maximum, λ = wavelength of light and m = ±1, ±2, ±3...
The relationship between y and D is given by
Since θ is small, sinθ ≈ θ ≈ tanθ
so, dθ = mλ ⇒ θ = mλ/d = y/D
Therefore, y = mλD/d
Now, for the first minimum above the slit, m = +1 and for the first minimum below the slit, m = -1. So, y₁ = λD/d and y₋₁ = -λD/d. So, the width of the central maximum Δy is the difference between the first minima below and above the central maximum. So, Δy = y₁ - y₋₁ = λD/d -(-λD/d) = 2λD/d
Substituting the values from above, Δy= 2 × 5.20 × 10⁻⁷ × 1.65/4.4 × 10⁻⁴ = 3900 × 10⁻⁶ m = 3.9 × 10⁻³ m = 3.9 mm
b. The first order fringe is the fringe located between the first minimum and the second minimum. From dsinθ = mλ and tanθ = y/D when θ is small, sinθ ≈ θ ≈ tanθ. So, y = mλD/d. Let m= 1 and m=2 be the first and second minima respectively. So,y₁ = λD/d and y₂ = 2λD/d. The difference Δy₁ = y₂ - y₁ is the width of the first order fringe.
Therefore, Δy₁ = 2λD/d - λD/d= λD/d.
Substituting the values from above, we have
λD/d= 5.20 × 10⁻⁷ × 1.65/4.4 × 10⁻⁴= 1.95 × 10⁻³ m = 1.95 mm
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Does anyone know the assets to this ?
Answer: The net force equals the mass times the acceleration so answer 1 would be 16N (4x4). Does that help at all?
Explanation:
g a -4.00 nc point charge is at the origin, and a second -5.50 nc point charge is on the x-axis at x = 0.800 m.
The magnitude and direction of the electric field at x = 0.200 m is 762.5 N/C to the left.
The magnitude and direction of the electric field at x = 1.200 m is 334.375 N/C to the left.
The magnitude and direction of the electric field at x = - 0.200 m is 949.50 N/C to the right.
The formula to calculate the magnitude of the electric field is
E = (kQ) ÷ r²
where
k = a Coulomb's constant = 9 × 10⁹ Nm²/C²Q = the magnitude of point charge (Coulomb)If the point charge has a negative charge, the direction of the electric field goes to the point charge. But if the point charge has a positive charge, the direction of the electric field goes away from the point charge.
The problem is not complete, it should say where is the point. Using a similar problem, for the same question.
For x = 0.200 m
Q₁ at originFor x = 1.200 m
Q₁ at originFor x = - 0.200 m
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You’re an astronaut in the first crew of a new space station. The station is shaped like a wheel 22 m in diameter, with essentially all its 5.0×105 kg mass at the rim. When the crew arrives, it will be set rotating at a rate that requires an object at the rim to have radial acceleration g, thereby simulating Earth’s surface gravity. This will be accomplished using two small rockets, each with 100 N thrust, mounted on
the station’s rim. Determine how long to fire the rockets.
The time taken to fire the rocket at the given thrust is 1,382.3 seconds.
What is the centripetal acceleration of the wheel?The centripetal acceleration of the wheel is calculated by applying the following formula.
F = ma
where;
a is the centripetal acceleration of the wheelm is the mass of the wheelF is the thrust or force of the rocketsa = F / m
a = (100 N) / (5 x 10⁵)
a = 2 x 10⁻⁴ m/s²
The velocity of the wheel is calculated as follows;
a = v²/r
where;
r is the radius of the wheel = 11 mv² = ar
v = √ (ar)
v = √ (2 x 10⁻⁴ x 11 )
v = 0.05 m/s
The time of motion of the motion of the rockets at the given speed is calculated as;
v = 2πr / T
T = 2πr / v
T = (2π x 11) / (0.05)
T = 1,382.3 seconds
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here's the answer for everyone :)
Answer:
b
Explanation:
Answer:
Explanation:thx
a 70.0 cm, uniform, 60.0 n shelf is supported horizontally by two vertical wires attached to the sloping ceiling (figure 1). a very small 25.0 n tool is placed on the shelf midway between the points where the wires are attached to it.a 70.0 cm, uniform, 60.0 n shelf is supported horizontally by two vertical wires attached to the sloping ceiling (figure 1). a very small 25.0 n tool is placed on the shelf midway between the points where the wires are attached to it.
The tension in left and right wire are 29 N and 53N respectively.
What is tension?Tension is a feeling of tightness, stress, or strain resulting from physical, mental, or emotional conflict. It is a state of being that can be caused by both positive and negative experiences. Tension can manifest itself in physical symptoms such as headaches, muscle tightness, and fatigue. It can also manifest itself emotionally in a sense of unease, worry, and anxiety. Tension can be both a healthy and unhealthy emotion. It can be a warning sign of danger or a motivator to take action. It can also be a sign of stress and can lead to feelings of helplessness or depression. Generally speaking, learning to recognize tension and finding ways to manage it is an important part of maintaining mental and physical well-being.
∑ fy=0
T1+T2=60+22 N=82N
∑ Mₐ=0 (moment about a=Mₐ)
22(25)+60(35)=50T2
T1=82-53=29N
Tension in left wire=29N
Tension in right wire=53N
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What is Hubble's law?
A) The longer the time period between peaks in brightness, the greater the luminosity of the Cepheid variable star.
B) The recession velocity of a galaxy is directly proportional to its distance from us.
C) The recession velocity of a galaxy is inversely proportional to its distance from us.
D) The faster a spiral galaxy's rotation speed, the more luminous it is.
E) The faster a spiral galaxy's rotation speed, the less luminous it is.
Option B The recession velocity of a galaxy is directly proportional to its distance from us is the correct option.
Hubble-Lemaître law
The Hubble-Lemaître law, sometimes referred to as Hubble's law, is the finding in physical cosmology that galaxies are eloping from Earth at rates proportionate to their separation. In other words, they are travelling away from Earth more quickly the more away they are. The redshift of the galaxies—a shift in the light they emit toward the red end of the visible spectrum—has been used to calculate their velocities.
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At which latitudes shown in the image of Earth do people experience the greatest tangential speed? Explain why.
Answer:
Below
Explanation:
At 0 ( or between 30 N and 30 S)
they travel the largest circle circumference in a 24 hour day rotation
what is the mass of a ball that has a kinetic energy of 105j and is traveling at 10 m/s?
Answer:
The mass of the object is 21 kg.
Explanation:
To find the mass of an object with a given kinetic energy and velocity, you can use the formula for kinetic energy, which is KE = 1/2 * m * v^2, where m is the mass of the object, v is its velocity, and KE is its kinetic energy.
In your case, the velocity is 10 m/s and the kinetic energy is 105j, so you can solve for m by rearranging the formula to solve for mass.
This gives you m = 2 * KE / v^2, or m = 2 * 105j / 10^2, which means the mass of the object is 21 kg.
find the velocity v of the block as a function of time. express your answer in terms of some or all of the variables: k , m , a , and t .
The velocity of the block as a function of time is [tex]v(t) = - A \sqrt{\frac{k}{m}} (\: sin \: \sqrt{\frac{k}{m}} t)[/tex]
Look at the attachment to see the picture of the block. The block is attached to a spring and placed on a frictionless surface. Simple harmonic motion applies to the system. The equation of the position as a function of time for the system
x(t) = A cos ωt
A = the amplitudet = the time interval ω = the angular frequencyx = the positionThere is the force of the spring in the system, according to Newton's second law
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two photons have the same wavelength. they also have the same question 30 options: frequency. energy. both of these. neither of these.
The fact that two photons have the same apparent wavelength does not mean that they are identical.
define photon ?
A photon is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation like as light and radio waves, and the force carrier for the electromagnetic force. Because photons have no mass, they always travel at the speed of light in vacuum, which is 299792458 m/s (or approximately 186,282 mi/s). The photon is a boson.
Photons, like other fundamental particles, are best explained by quantum physics and display wave-particle duality, or behaviour that exhibits traits of both waves and particles. The current photon notion emerged during the first two decades of the twentieth century, thanks to the work of Albert Einstein, who expanded on Max Planck's study.
Because photon frequencies (or inversely, wavelengths) are part of a continuous universe, doesn't this imply that no two photons have the same frequency Due to measuring constraints, two photons may have the same apparent wavelength, but this does not imply that they are identical.
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The geocentric model could not explain which of the following observations made by early astronomers? Select the two correct answersMars and Jupiter appeared to move backwards for some period of timeThe planets had epicyclesThe stars appeared to moveMercury and Venus changed in appearance throughout the year
Mercury and Venus changed in appearance throughout the year and Mars and Jupiter appeared to move backwards for some period of time are two observation not explain by geocentric model.
The geocentric model is what.The Ptolemaic system frequently serves as an example of the geocentric paradigm, also referred as geocentrism, which is a discredited theory that places Earth at the center of the universe. Our Sun, Moon, stars, & planets also orbit Earth according to the majority of geocentric models.
What was the geocentric model of Aristotle?According to Aristotle's model, the celestial planets orbit the Earth in a regular, orderly fashion, in perfect circles, and with uniform motion, neither accelerating nor decelerating.
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If there is no external force on a moving object, it will
A stop moving.
B.keep moving with constant velocity.
C.gradually slow down until it stops.
D.gradually speed up.
E.maintain the same state of motion.
Answer:
B keep moving with constant velocity
Explanation:
newton's third law of motion
If a pendulum from Earth is taken to the moon, will its frequency increase or
decrease? Why?
It will increase because g on the moon is greater than g on Earth.
It will increase because g on the moon is less than g on Earth.
It will decrease because g on the moon is greater than g on Earth.
It will decrease because g on the moon is less than g on Earth.
If a pendulum from Earth is taken to the moon, its frequency decrease, D. It will decrease because g on the moon is less than g on Earth.
Why will the frequency decrease?The moon is significantly lighter than the Earth itself. Not only is the Moon smaller than the Earth, but it is also only about 60% as dense. As a result, the gravitational attraction on the Moon is much lower than on Earth, and a person weighs less on the Moon.
The acceleration due to gravity on the Moon's surface is approximately 1.625 m/s² which is approximately 16.6% of the acceleration due to gravity on Earth's surface, or 0.16. When a simple pendulum is taken from the earth to the moon, its pull decreases, causing the time period to increase. The value of 'g' on the moon is one-sixth that of the Earth's surface.
If a pendulum is taken from the Earth to the moon, the pendulum will have a lower frequency on the surface of the Moon as on the surface of the Earth.
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if the angle opf elevation of the cannon is decreased from 35 degrees to 30 degrees, the ertical compent of the balls iontial veclotiy will
Answer:
Decrease
Explanation:
Decrease
Vertical component = v sin (angle)
sin 30 is less than sin 35
John's home had 20 pounds of condiments. sugar made up 40% of the condiments. Salt made up the rest. After some sugar was used, sugar made up 25% of the condiments. How many pounds of sugar were used? pounds of sugar
3 pounds of sugar were used.
What are percentages?Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.
How to find the amount of sugar used;
40% of sugar + 60% of salt = 20 pounds of condiments
Therefore 40% of sugar = (40/100) x 20
Sugar = 8 pounds
Therefore;
Salt = 20 - 8 pounds
Salt = 12 pounds
For sugar to make up 25% of the condiments;
Sugar = (25/100) x 20 pounds
Sugar = 5 pounds
The amount of Sugar used;
Sugar = 8 - 5 pounds
Sugar = 3 pounds
The amount of sugar used up is 3 pounds.
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Learning Goal: To understand the standard formula for a sinusoidal traveling wave One formula for a wave with a y displacement (e.g., of a string) traveling in the x direction is y(x, t) A sin(kx-wt) All the questions in this problem refer to this formula and to the wave it describes. Part A Which of the following are independent variables? O r only O t only O A only O k only w only O and t O w and t O A and k and w Submit Request Answer Part B Which of the following are parameters that determine the characteristics of the wave? only O t only O A only O k only w only and t and t O A and k and w Submit Request Answer PartD What is the wavelength λ of the wave? Express the wavelength in terms of one or more given variables (A, k, r, t, and w) and any needed constants like π. Azo Part E What is the period 1' of this wave? Express the period in terms of one or more given variables (A, k, x, t, and w) and any needed constants like TT A2p Part F What is the speed of propagation of this wave? Express the speed of propagation in terms of one or more given variables (A, k, r, t, and w) and any needed constants like T. A2o
The answer related to the sinusoidal travelling wave is given below:
A. x and t
B. A and k and ω
D. Lambda = 2*pi/k
E. T = 2*pi/omega
F. v = omega/k
What is sinusoidal travelling wave?
The mathematical curve known as a sine wave, also known as a sinusoidal wave or simply a sinusoid, is described in terms of the sine trigonometric function, of which it is the graph. Both a smooth periodic function and a kind of continuous wave, it.
Independent variables can be freely changed to affect the function's value. On a function plot, the independent variables are often plotted on the horizontal axis.
x and t
The properties of a given function are set by parameters, which are constants. The amplitude, frequency, wavelength, and period of a wave are some examples of these.
A and k and ω
Think about the shape of the wave at time t=0. The wave slopes upward at x=0 and crosses the y axis. The upward-sloping y axis is crossed by the wave at the next x position, which is the wavelength (i.e., the length of one complete cycle of oscillation).
The wavelength should be expressed in terms of one or more of the supplied variables (A, k, x, t, and omega) and any necessary constants, such as pi.
lambda = 2*π/k
In terms of one or more of the provided variables (A, k, x, t, and omega) and any necessary constants, such as pi, express the period.
T = 2*π/omega
Given variables (A, k, x, t, and omega) and any necessary constants (such as pi) should be used to express the speed of propagation.
v = omega/k.
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5. An automobile with a mass of 1000 kilograms accelerates when the traffic light turns green. If the
net force on the car is 4000 Newtons, what is the car's acceleration?
Answer:
Therefore, the acceleration of the car will be 4 (ms2).
f the perimeter of the window is 16 feet, find the exact value of x (in ft) so that the greatest possible amount of light is admitted.
The perimeter of the window is 16 feet, find the exact value of x (in ft) so that the greatest possible amount of light is admitted is 37.278 feet.
What is perimeter?
The area surrounding a shape's edge is known as its perimeter. By multiplying the side lengths of various forms, one can determine their perimeter.
What is light ?
The electromagnetic radiation known as light is what enables the human eye to see and makes things visible. It can also be described as radiation that can be seen by humans. Light is made up of small energy packets called photons.
perimeter = 16
x+2h+πx/2= 16
h= 8-x/2- xx/4⇒1
maximize
Area;
A= xh+π(x/2)²/2
A= xh+π x²/8
Pu + h = 8-x/2 - xx/4
A= x(8-x/2 - xx/4 ) +π/8 x²
A= 8x- x²/2 - x²/4 +xx²/8
Differentiate with respect to "x"
dA/dx = 8x-1 -π/4*2x²+π/8*2x²⁻¹
dA/dx = 8-x-π/2 x+π/4 x
dA/dx= 8- (1-π/2 +π/4 ) x
For maximum
Solve dA/dx=0
= 8-(1-π/2+π/4)x =0
x= -8/-(1-π/2+π/4)
x= 37.278 feet
Therefore, the perimeter of the window is 16 feet, find the exact value of x (in ft) so that the greatest possible amount of light is admitted is 37.278 feet.
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DOO
Ransit
If the two objects above are traveling at the same speed, which has more momentum?
O The car, because its shorter
O The truck, because its taller
O The car since it has less mass
O The truck, since it has more mass
Answer:
truck, since it has more mass
Explanation:
truck, since it has more mass
formula:
momentum (p) = mass (m) times velocity (v)
height has nothing to do with it
Which method of heat transfer warms the air just above hot sand on a beach?
Convection, because heat is transferred through the solid sand
Conduction, because the air particles in contact with hot sand move faster
Conduction, because the heat moves with the help of electromagnetic waves
Convection, because the air particles transfer heat in the absence of a medium
Heat is transferred by a fluid's macroscopic movement, which is known as convection. Weather systems and forced-air furnaces both use this form of transmission. Thus, option A is correct.
What Convection method of heat transfer warms?Convection, as heat is transmitted through the sand's solid structure. Conduction, as the air particles that come into contact with the hot sand travel more quickly.
The heat is transferred inside the fluid during convection. Heat transfer in radiation happens by electromagnetic waves without the use of particles.
Conduction, as heat is transferred using electromagnetic waves Convection, since heat is transferred by air particles without the usage of a medium.
Therefore, Convection, because heat is transferred through the solid sand.
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Curran is testing out a newly waxed hallway floor by sliding in his socks.
He runs from one end of the hallway and starts sliding midway going all
the way to the right. The forces acting on Curran as he is sliding are
represented in the diagram below. Identify the forces and match them
correctly to the numbers.
Answer:
Curran is testing out a newly waxed hallway floor by sliding in his socks.
He runs from one end of the hallway and starts sliding midway going all
the way to the right. The forces acting on Curran as he is sliding are
represented in the diagram below. Identify the forces and match them
correctly to the n
in 1990 walter arfeuille of belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth.
In 1990 Walter areole of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, the total force is 2.76 kN.
What is force?
An object having mass changes its velocity in response to a push or pull. Force is an external agent that has the power to alter a body's resting or moving condition. It has a size and a movement.
What is distance?
The entire movement of an object, regardless of direction, is called distance. Distance can be characterized as the quantity of ground covered, regardless of the starting or finishing points of an object.
a)Work done = m*g*h
where g = acceleration of gravity = 9.8 m/s2
h = 17.1 cm = 0.171 m
So, W = 281.5*9.8*0.171 = 471.8 J
b)Total force exerted,
F = mg = 281.5*9.8 = 2758.7 N = 2.76 kN
Therefore, in 1990 Walter areole of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, the total force is 2.76 kN.
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Define power and discuss how to determine power.
Power is the rate at which work is done or energy is transmitted. In other words, it is a measure of the amount of work that can be done in a given amount of time. Power is typically measured in watts, where one watt is equal to one joule of energy per second.
To determine power, you need to know the amount of work being done and the time it takes to do that work. For example, if a machine lifts a weight of 100 joules in 2 seconds, the power of the machine is 100/2 = 50 watts.
Another way to determine power is to measure the rate at which electrical energy is being transferred. In this case, power is calculated by multiplying the voltage of the electrical current by the current itself. For example, if an electrical current has a voltage of 10 volts and a current of 5 amps, the power would be 10 x 5 = 50 watts.
It is important to note that power is not the same as energy. While power is a measure of how quickly work is done or energy is transferred, energy is a measure of the total amount of work that can be done or the total amount of energy that can be transferred.
Answer:
power is the amount of energy transferred or converted per unit time. The formula is P = E/t, where P means power, E means energy, and t means time in seconds. This formula states that power is the consumption of energy per unit of time.
a homogeneous cylinder of radius r and height h floats at the interface of two fluids with densities. if p2
The pressure differential between the cylinder's top and bottom is expressed as
Δp=gH/2(Pa+Pb)
define homogeneous ?
A homogeneous population is one that is made up of components or pieces that are all of the same sort; it is not heterogeneous.
Mathematics.
possessing a common quality throughout: a homogenous solid figure.
A homogeneous equation has all terms of the same degree.
when each variable is multiplied by that constant, the function of numerous variables gets multiplied by some power of that constant: x2y3 is a degree 5 homogeneous expression related to a differential equation in which a linear combination of derivatives is set to zero.
As we know, the weight of the cylinder balances the force due to pressure.
As a result, we will have
F=mg
so we have
Δpπr^2=mg
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