What is the difference between a motor and a generator.

Answer:

The pressure difference required between the two ends of the 1.6 km pipe section, with a diameter of 29 cm, to transport the oil at a rate of 650 cm^3/s, is approximately 0.398 Pa.

Explanation:

To calculate the pressure difference between the two ends of a pipe, we can use the Poiseuille's Law equation, which relates flow rate, viscosity, pipe length, diameter, and pressure difference.

The formula is as follows: ΔP = (8 * n * L * Q) / (π * r^4)

Where:

ΔP is the pressure difference,

n is the viscosity of the fluid,

L is the length of the pipe section,

Q is the flow rate,

and r is the radius of the pipe (half of the diameter).

Given:

L = 1.6 km = 1600 m (convert to meters)

Diameter = 29 cm

Radius (r) = 29 cm / 2 = 14.5 cm = 0.145 m (convert to meters)

Q = 650 cm^3/s = 650 * 10^-6 m^3/s (convert to cubic meters per second)

n = 0.20 Pa.s (viscosity)

p = 950 kg/m^3 (density)

ΔP = (8 * 0.20 * 1600 * 650 * 10^-6) / (π * (0.145)^4)

ΔP ≈ 0.398 Pa

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Answer:

c.

Explanation:

A) The linear speed of the child seated 1.2 m from the center is approximately 7.54 m/s.

B) The child's acceleration has two components: a centripetal acceleration of approximately 14.99 m/s² directed toward the center of the merry-go-round, and a tangential acceleration of 0 m/s², as there is no change in speed.

C) The angular acceleration the child experiences when the merry-go-round uniformly comes to rest in 7.38 revolutions is approximately -0.677 rad/s².

D) The child's tangential acceleration is approximately 0 m/s², as there is no change in speed.

E) The angular acceleration the child experiences 0.63 seconds after the merry-go-round begins to slow cannot be determined without additional information.

A) Linear speed (v) can be calculated using the formula v = rω, where r is the radius and ω is the angular speed.

Given that the merry-go-round makes one complete revolution in 4.0 s, the angular speed can be calculated as ω = (2π rad)/(4.0 s) = 1.57 rad/s.

Substituting the values, we have v = (1.2 m)(1.57 rad/s) = 7.54 m/s.

B) The centripetal acceleration (aₙ) can be calculated using the formula aₙ = rω², where ω is the angular speed.

Substituting the values, we have aₙ = (1.2 m)(1.57 rad/s)² = 14.99 m/s².

The tangential acceleration (aₜ) is 0 m/s² as there is no change in speed.

C) The angular acceleration (α) can be calculated using the formula α = (ωf - ωi)/t, where ωi is the initial angular speed, ωf is the final angular speed, and t is the time taken.

Given that the merry-go-round comes to rest in 7.38 revolutions (i.e., 2π(7.38) rad), the final angular speed is 0 rad/s.

Substituting the values, we have α = (0 rad/s - 1.57 rad/s)/(7.38 rev)(2π rad/rev) = -0.677 rad/s².

D) The tangential acceleration is 0 m/s² as there is no change in speed.

E) The angular acceleration after 0.63 seconds cannot be determined without additional information.

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τ₁ = 10 N * 8.0 m * sin 90° = 80 N.mτ₂ = 16 N * 4.0 m * sin 37° = 48.1 N.mτ₃ = 19 N * 3.0 m * sin 42° = 22.2 N.m Net torque, τ = τ₁ + τ₂ + τ₃Net torque, τ = 80 N.m + 48.1 N.m + 22.2 N.m Net torque, τ = 150.3 N.m Therefore, the net torque about point O is 150.3 N.m.

Torque is defined as a force that causes an object to rotate around an axis or pivot point. It is dependent on the magnitude of the force, the distance from the force to the axis, and the angle between the force and the line of action of the force. A positive torque produces counterclockwise rotation, while a negative torque produces clockwise rotation.Let's calculate the net torque about point O. The torque produced by each force is the magnitude of the force multiplied by the distance from the force to the pivot point and the sine of the angle between the force and the line of action of the force. Here, we have three forces acting on the body at points A, B, and C, respectively. Therefore, Net torque τ = τ₁ + τ₂ + τ₃

where,τ₁ is the torque produced by force F₁ at point Aτ₂ is the torque produced by force F₂ at point Bτ₃ is the torque produced by force F₃ at point C. The direction of the torque can be positive or negative depending upon the direction of force. The net torque would be positive if the sum of the torque produced by forces causes the body to rotate anticlockwise about O. Otherwise, it would be negative .Here, torque can be calculated as,

Torque,τ = F * r * sin θ

The force, distance and angle can be calculated as: Force,

F = 10N, 16N, 19N

Distance, r = 8.0 m, 4.0 m, 3.0 m

Angle, θ = 90°, 37°, 42°

Now, let's calculate torque:

τ₁ = 10 N * 8.0 m * sin 90° = 80 N.m

τ₂ = 16 N * 4.0 m * sin 37° = 48.1 N.m

τ₃ = 19 N * 3.0 m * sin 42° = 22.2 N.m

Net torque, τ = τ₁ + τ₂ + τ₃

Net torque, τ = 80 N.m + 48.1 N.m + 22.2 N.m

Net torque, τ = 150.3 N.m

Therefore, the net torque about point O is 150.3 N.m.

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A high jumper reaching the peak of their jump and A ball being tossed directly upward before reaching its highest point represents kinetic energy transforming into potential energy.

Kinetic energy (K.E.) can be described as the energy contained by a moving object due to its motion. The change in the kinetic energy of a moving body is equal to the work done.

The kinetic energy (K.E.)  of a moving object can be written as:

K.E = ½mv²  where ‘m’ is the mass, ‘v’ is the velocity of the object.

Potential Energy (P.E) can be defined as the energy that is stored by an object due to its position and is equal to P.E = mgh where ‘m’ is the mass, ‘g’ is the gravitational acceleration and ‘h’ is the height (in m).

The kinetic energy of the ball and the jumper is maximum at the ground and their kinetic energy changes into potential energy as they are moving toward the highest point.

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The  correct  processes based on the type of energy transfer they involve can be linked as ;

Conduction, radiation, and convection are the three different ways that thermal energy is transferred. Only fluids experience the cyclical process of convection.

The total amount of energy in the universe has never changed and will never change because it cannot be created or destroyed.

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The force of friction acts in the direction opposite to the direction of motion, so it acts up the inclined plane in this case. We can use the following equations of motion to solve for the force of friction:

v^2 = u^2 + 2as

where v is the final velocity, u is the initial velocity (which is zero in this case), a is the acceleration, s is the distance traveled, and we can use the following equation to relate the force of friction to the normal force:

f_friction = μ_k N

where μ_k is the coefficient of kinetic friction and N is the normal force, which is the component of the weight of the block that is perpendicular to the inclined plane.

First, we need to find the distance traveled by the block down the incline. We can use trigonometry to determine the height of the incline:

h = sin(30°) x length of incline = 0.5 x length of incline

The length of the incline is not given in the problem, so we can leave it as a variable. The distance traveled down the incline is equal to the length of the incline multiplied by the sine of the angle of inclination:

s = length of incline x sin(30°) = 0.5 x length of incline

Now we can use the equation of motion to solve for the final velocity:

v^2 = u^2 + 2as

v^2 = 0 + 2 x 3.0 m/s^2 x 0.5 x length of incline

v^2 = 3.0 m^2/s^2 x length of incline

The final velocity is also given by:

v = √(2gh)

where g is the acceleration due to gravity and h is the height of the incline. Substituting the value of h we found earlier:

v = √(2gh) = √(2 x 9.8 m/s^2 x 0.5 x length of incline) = √(9.8 m^2/s^2 x length of incline)

Now we can equate the two expressions for v and solve for the length of the incline:

3.0 m^2/s^2 x length of incline = 9.8 m^2/s^2 x length of incline

length of incline = 3.27 m

Now we can use the length of the incline to find the normal force:

N = mg cos(30°) = 1.8 kg x 9.8 m/s^2 x cos(30°) = 15.26 N

Finally, we can use the coefficient of kinetic friction to find the force of friction:

f_friction = μ_k N = 0.23 x 15.26 N = 3.51 N

Therefore, the magnitude of the force of friction acting on the block is approximately 3.5 N, which is closest to option (3) 3.4 N.

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The direction in which water flows down a drain is not affected by whether you are in the northern or southern hemisphere.

The idea that water drains counterclockwise in the northern hemisphere and clockwise in the southern hemisphere is a popular myth.

The direction in which water flows down a drain is actually determined by a combination of factors such as the shape of the basin or container, the location of the drain, and any other forces acting on the water, such as the Coriolis force.

The Coriolis force is a real phenomenon that affects the movement of objects in the atmosphere and oceans, but its effect on the flow of water down a drain is generally too weak to be noticeable. In fact, the direction of rotation of the Earth has very little impact on the direction in which water flows down a drain.

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Conservation of momentum

Pix = Pfx

m1= Archer's mass = 102.3 kg

v1 = Archer's velocity =

m2 = arrow's mass = 99g = 0.099 kg

v2f= arrow's velocity = 104.2 m/s

0= m1 v1 + m2 v2

V1= -( m2/m1) v2

V1 = - (0.099 kg /102.3 kg) *104.2 m/s

V1= - 0.1008 m/s

magnification m = -v/u  = -2

Concave mirrors can generate both real and virtual images. A virtual, magnified image of the object is produced when the concave mirror is positioned very near to it.

As the distance between the object and the mirror increases, the size of the image decreases and real images are produced. When an object's distance is less than the focal length in a concave mirror, the magnification will be higher than one. When the object's distance exceeds the focal length, the magnification is less than one.

Given focal length f = 18 cm

image distance v = 54 cm

then from lens equation

(1/f) = (1/u)+(1/v)

(1/18) = (1/u)+(1/54)

-(1/u) = (1/54)-(1/18)

object distance u = (18*54)/(18-54) = 27 cm

magnification m = -v/u = (-54)/(27) = -2

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Answer:

a)    I = 13.38 kg m / s, b)    F = 1,373 10³ N

Explanation:

The impulse is given by the relation

          I = ∫ F dt = Δp

          I = p_f -p₀

          I = m (v_f - v₀)

take the ball's exit direction as positive, whereby the ball velocities

v₀ = -90mph, the final velocity v_f = + 54 m / s

Let's reduce the units to

         I = 0.142 [54- (-40.23) ]

      the SI system

        v₀ = - 90 mph (1609.34 m / 1 mile) (1h / 3600 s = -40.23 m / s

        m = 142 g (1kg / 1000) = 0.142 kg

we calculate  

          I = 0.142 [54- (-40) ]

          I = 13.38 kg m / s

b) let's use the definition of momentum

         I = ∫ F .dt

         I = F ∫ dt

         F = I / t

         F = 13.38 / 0.008

         F = 1,373 10³ N

The fundamental quantities that are combined to give area,volume,density,speed are given below:

Area=length

Volume=length

Density=mass,length

Speed=length,time

Hope,itwillhelpya!

The fundamental quantities that are combined to give area, volume, density, and speed are given below:

Fundamental quantities simply mean the quantities that do not depend on any other physical quantity. Examples include time, length, temperature, mass, etc.

It should be noted that the area and the volume of a shape is gotten from their lengths. Density is gotten from mass and length while speed is gotten from the length and time.

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A force applied to a spring stretches it by 4.0 cm. If the applied force is doubled, the spring will be stretched twice.

F = -kx

From the given information, we can say that:

F1 = kx1 ---(1)

where F1 is the initial force applied, and x1 is the initial displacement or stretch of the spring.

If the applied force is doubled, the new force will be 2F1. The new displacement or stretch of the spring can be denoted as x2. From Hooke's Law, we have:

2F1 = kx2 ---(2)

To find x2, we can rearrange equation (2) as:

x2 = (2F1) / k

We can substitute F1 = kx1 from equation (1) into equation (2) to get:

x2 = (2kx1) / k = 2x1

Force is a fundamental concept in physics that describes the push or pull on an object. It is a vector quantity, which means it has both magnitude and direction. The SI unit of force is Newton (N), and it is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

Force can be exerted by one object on another through direct contact (such as pushing a book) or at a distance (such as the gravitational force between the Earth and the Moon). The strength of a force depends on several factors, including the mass of the objects involved and the distance between them. Forces can cause changes in motion, including speeding up, slowing down, or changing direction.

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Answer:

Centripetal Acceleration = v^2/r

= (circumference/time)^2/r

= (2*pi*r/t)²)/r

= ((2³.14*50/14.3)²)/50

= 9.64 m/s²

brainlist?

Explanation:

Answer:

Below

Explanation:

Possibly.... it would depend on the weights of the vehicles and the coefficient of static friction of each of the configurations for the vehicles .

Different tires have different coeff static friction

1)  Light energy ----> 2) Electricity ----- > 3)Sound energy

4) Light energy ------> 5) Heat energy ----> 6) Kinetic energy

7) Light energy ----> 8) Chemical energy -----> 9) Kinetic energy

10) Light energy -----> 11) Heat energy

12) Light energy ------> 13) Electrical energy -----> 14) Kinetic energy

We know that energy transformation has to do with the change of the energy from one form to the other. We have to note that from the first law of thermodynamics, it is clear that energy can not be created nor destroyed but it can be transformed from one form to the other.

Now, we have to note that in all the cases that we have below, there is the transformation of energy from one form to the other as shown above.

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When x = 13, the right-hand side of the equation is equal to 702720. Therefore, the dimensions of the box are 154 by 288 by 26.

The volume of the box is given by the formula:

V = lwh

where:

V is the volume in cubic inches

l is the length in inches

w is the width in inches

h is the height in inches

We are given that the volume of the box is 702720 cubic inches. We are also given that the piece of material is 167 inches long and 301 inches wide. When we cut squares from each corner, the length and width of the piece of material are reduced by 2x inches. The height of the box is also 2x inches.

We can write the following equation to represent the volume of the box:

702720 = (167 - 2x)(301 - 2x)(2x)

We can solve for x by expanding the left-hand side of the equation and then using trial and error to find a value of x that makes the right-hand side equal to 702720.

When x = 13, the right-hand side of the equation is equal to 702720. Therefore, the dimensions of the box are 154 by 288 by 26.

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Answer:

vega the first one

pb

p

Explanation:

Answer:

you should rest or decrease the activity that is causing the problem, ice the painful area

Explanation:

Hope this helps~!

Answer:

Your question is hard to understand, are you asking what you should do?

Explanation:

If so then the answer is to stop doing the exercise. You want to stop immediately because you can cause damage. You can tear a muscle if you keep pushing yourself if you feel pain. (not to be confused with uncomfortableness).

Answer:

The particles have more distance in them which impacts the density.

Explanation:

A solid's particles are much more closer together than that of a liquid's particles. Same thing goes for gas particles(they are much more far apart than liquid particles). This is why solids usually are more denser than liquids and gas, due to the way their particles are structured. Hope this helps!

Answer:

\( \boxed { \tt{gravitational \: pull(force)}}\)

Answer:

characteristics of electromagnetic waves:-

A characteristics Feature of electromagnetic waves that make them useful for transmitting signal is that they are easily transmitted through

In physics, electromagnetic radiation is defined as  waves created as a result of the electromagnetic field vibratons moving through space, carrying electromagnetic  energy. The waves produced  includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays.

The character of an electromagnetic wave is dependent on its frequency or wavelength making each electromagnetic spectrum having their own range of uses.

For transmitting signals, Radio waves as well as  Microwaves is useful , while the former help transmit  Information through radio and TV stations the later is used in satellite communications, this is because

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Answer:

it is very hard but i am trying to help you.

Explanation:

Answer:

a solution

Explanation: A solution is a homogeneous mixture consisting of a solute dissolved into a solvent .

To calculate the spring force required to hold the valve closed under a pressure of 3.5 megapascals, we need to use the formula for pressure, which is Force divided by area.

The area of the piston is πr^2, where r is the radius of the piston (which is half of the diameter given in the question). Therefore, the area of the piston is π(15 mm)^2 = 706.9 mm^2.

Now we can calculate the force required to hold the valve closed:

Force = Pressure x Area
Force = 3.5 MPa x 706.9 mm^2
Force = 2470 N

So, the spring force required to hold the valve closed under a pressure of 3.5 megapascals is 2470 Newtons. This force must be applied to the outside of the piston to counteract the pressure inside the tank and prevent the valve from opening.

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Answer:

Friction

Explanation:

Because the brake pad is rubbing alongside the wheel to slow the body of the car down