what is the kinetic energy of electrons when they reach their target

Answer:

Explanation:

57.8 m/s

The star is moving away from Earth at a velocity of 1.8 x 106 m/s.

The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.

The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.

The velocity of a star moving away from Earth can be determined using the equation:

v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).

In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.

The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.

Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.

Therefore, velocity of star 1.8 x 106 m/s.

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Answer:

The branch of physics that is most relevant to football is mechanics, the study of motion and its causes.

Explanation:

When the ball leaves the punter's foot, it is moving with a given velocity (speed plus angle of direction) depending upon the force with which he kicks the ball. The ball moves in two directions, horizontally and vertically. Because the ball was launched at an angle, the velocity is divided into two pieces: a horizontal component and a vertical component.

When NaOH is added to water, it separates into Na+ and OH-. The hydroxyls make it more basic.

A basic solution is an aqueous solution containing more OH⁻ ions than H⁺ ions.

When NaOH as a solute is mixed into the solvent like water, it separates NaOH into Na+ and OH-. The sodium ions Na⁺ have little effect on the solution, but the hydroxyls OH⁻ ions makes the solution more basic.

Thus, NaOH form a basic solution by the presence of OH⁻ ions  into it.

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The efficiency of the Pelton Wheel is maximum when the speed ratio is unity (u = 1) and the jet strikes the bucket at 180°, therefore the value of u and φ (angle between jet and tangent at the point of contact) are chosen as 1 and 180° respectively.

Now we can determine the power output of the turbine using the following equation:P = m × (V1 - V2) × gWhere,P = Power output of the Pelton Wheelm = Mass flow rate of waterV1 = Velocity of jetV2 = Velocity of leaving water streamg = Acceleration due to gravityTaking the absolute value of the head gives the velocity of the jet:V1 = √(2gh)Where,g = Acceleration due to gravityh = HeadThe velocity of the water leaving the bucket is given by:V2 = V1 - 2u × V1 = (1 - 2u) × V1P = m × V1 × (1 - 2u) × g.

Therefore the head required for 1-m-diameter Pelton Wheel rotating at 300 rpm is:(c) 40We can use the following equation for solving this question as described above:P = m × (V1 - V2) × gSince, u = 1V2 = (1 - 2u) × V1V2 = (1 - 2) × V1V2 = - V1Then,P = m × (V1 - (-V1)) × gP = m × (2V1) × gP = m × 2 × √(2gh) × gP = 2 × m × g × √(2gh)Therefore the power produced by the Pelton Wheel is directly proportional to the head of water supplied to it.

Therefore, the higher the head of water supplied to the Pelton Wheel, the higher will be the power output of the Pelton Wheel. From the above expression of power, we can see that the power of the Pelton Wheel depends on the value of √(2gh). This means that as the value of h increases, the power output of the Pelton Wheel increases. Therefore, the best-suited head for this turbine is the highest one from the given options, which is (c) 40.

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Using the Standard population for region, the proportionate mortality for old people in region Y is 80%. The correct answer is option  (c).

To calculate the proportionate mortality, we need to determine the number of deaths among old people in region Y and divide it by the standard population for region Y.

According to the given options, option c is the correct answer, which states that the proportionate mortality is 48/60 = 80%.

This means that out of the standard population of 60 in region Y, 48 deaths occurred among old people. This indicates a high proportionate mortality rate for the elderly population in region Y, reflecting the impact on that age group's mortality in the region.

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Answer:

Explanation:

m = 55 kg

a = 9.8

F = ?

The first thing you are going to do is find the force that the girl represents.

F = 9.81 * 55

F = 539.55

But that is not the answer. That is her weight. A very important part of this question is to realize that the floor is pushing up on her with an equal force.

Her weight is going DOWN.

The floor is pushing UP with a force of 539.55 Newtons.

Answer:

(a) k = 80 N/m   (b) x = 75 cm

Explanation:

The question says that, "A spring is elongated 30 centimeters when we exert a force of 24 N on it a) calculate the value of the spring constant b) calculate the elongation of the spring when applying a force of 60 N"

Given that,

Force exerted on the spring, F = 24 N

Elongation in the spring, k = 30 cm =0.3 m

(a) We know that, the force on the spring is given by :

F = kx

Where

k is spring constant

So,

\(k=\dfrac{F}{x}\\\\k=\dfrac{24}{0.3}\\\\k=80\ N/m\)

(b) When F = 60 N,

\(x=\dfrac{F}{k}\\\\x=\dfrac{60}{80}\\\\x=0.75\ m\\\\x=75\ cm\)

Hence, this is the required solution.

Answer:

27.5

Explanation:

KE=1/2m(v)^2

The two basic classes of forces are static and dynamic. Static forces refer to forces that do not change with time or have a constant magnitude, such as the force of gravity acting on an object at rest. Dynamic forces, on the other hand, involve changes in magnitude and direction over time, like the force applied to a moving object. Long-range and contact forces are not the two basic classes of forces but rather describe different types of forces. Long-range forces, like electromagnetic forces, act over a distance without direct contact between objects. Contact forces, such as friction or normal forces, require direct contact between objects. Empirical and theoretical forces are not the correct terms to describe the two basic classes of forces. Empirical refers to observations or experimental data, while theoretical refers to concepts and models based on scientific principles. External and internal forces are not the two basic classes of forces, but rather describe the source or location of the force. External forces come from outside an object, while internal forces act within an object.

The two basic classes of forces are static and dynamic forces, and long-range and contact forces. Static forces do not cause motion, while dynamic forces do. Long-range forces act over a distance, while contact forces act when objects are in direct contact.

The two basic classes of forces are:

1. Static and dynamic forces: Static forces refer to forces that do not cause any motion or change in an object's position. Examples include the force exerted by a wall or the force needed to lift an object without moving it. On the other hand, dynamic forces are those that cause motion or change in an object's position. Examples include the force exerted by a person pushing a cart or the force of gravity acting on a falling object.

2. Long-range and contact forces: Long-range forces act between objects that are not in direct physical contact. These forces can act over large distances, such as gravitational forces or electromagnetic forces. Contact forces, on the other hand, act only when objects are in direct physical contact. Examples include friction, normal force, and tension.

In conclusion, the two basic classes of forces are static and dynamic forces, and long-range and contact forces. Static forces do not cause motion, while dynamic forces do. Long-range forces act over a distance, while contact forces act when objects are in direct contact.

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Answer:

s = ut + 1/2 att (that's "t" squared), where

s = distance travelled - in metres

u = initial velocity - in meres per second

a = acceleration - in metres per second squared, i.e. metres per second increase in acceleration, per second

t = time taken  - in seconds

Explanation:

Time, "t",  at a specific moment is a resolved variable, i.e. we know the value, so the equation needs to show distance "s" at that specific time "t". The basic equation is for fixed initial position (when t = 0) , where distance ,"s", = "0", fixed initial velocity, "u", ( at t = 0, s = 0 ) - which can be zero or a value, and fixed (constant) acceleration, "a", ( from t = 0, s = 0, through to t = "specific moment", s = "the answer" ) - which can be zero or a value.

Answer:

A. Blue

Explanation:

Answer:

Explanation:

Given

Power (p)= 726 watt

Time (t) = 14 sec

distance travelled (d; h) = 36 m

mass (m) = ?

we know

Power (p) = W/t  ( w = work done )

p = m * g * h / t  ( w = m * g* h)

726 = m * 10 * 36 / 14 ( g = 10 m/s^2)

m = 28. 23 kg

or if we use the value of g as 9.8 m/s^2

the mass will be

= 28.8 kg

hope it helps :)

The mass of the object if it takes 726 watts of power to move an object 36 m in 14 s is 28.8 kg.

An object's inertia, a fundamental property, is measured by its mass, a fundamental indicator of the volume of substance inside the thing. Definitions of mass can seem circular since it is such a fundamental quantity and is challenging to define in terms of another.

It is possible to define every mechanical quantity in terms of mass, length, and time. The SI unit for mass, denoted by the letter m, is the kilogram. While mass is typically thought of as an immutable feature of an item, relativistic mass must be taken into account when traveling at speeds close to the speed of light.

Given:

The Power, p = 726 watt

The Time, t = 14 sec

distance travelled, d = 36 m

Calculate the power by the given formula

p = W / t  

p = m * g * h / t  ( w = m * g* h)

726 = m * 9.8 * 36 / 14 ( g = 10 m/s^2)

m = 28. 8 kg

Therefore,  the mass of the object If it takes 726 watts of power to move an object 36 m in 14 s is 28.8 kg.

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Answer:

ρ (density) = M / V         mass / unit volume

ρ = 10 g / 5 cm^3 = 2 g/cm^3        density of the metal

A concave mirror has a focal length of 17 cm. the mirror forms an image located 42 cm in front of the mirror. - 1.40 is the magnification of the mirror

A microscope's capacity to generate a picture of an item at a scale that is bigger (or even smaller) than its real size is known as magnification. Only when it is feasible to discern more details of an object in the picture than when examining the object with the unassisted eye can magnification serve a beneficial function.

Given:

A concave mirror has a focal length of  = F = 17 cm

This mirror forms an image located = V =  42 cm

(in front of the mirror)

magnification of the mirror= M = ?  (Include the sign.)

It is known by the formula mirror

1/ F = 1/U + 1/V

where U is the distance  of the object form mirror = U = ?

thus,  FV / (V - F)  = U

or, (17)×(42) /(42 - 17) = 28.56 cm

thus, U = 28.56 cm

So, magnification of the concave mirror:

M = - V / U

or, M = - 40 cm / 28.56 cm

or, M = -  1.40

thus, magnification, M = - 1.40  

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When entering an expressway, in the acceleration lane a driver search for a gap in traffic and adjust speed to the speed of the traffic. Option A is the correct answer.

Expressways, often referred to as freeways, interstate highways, and turnpikes, are multi-lane roadways devoid of stop signs, traffic signals, or train crossings. These factors make expressways a quick and secure means of transportation. Option A is the correct answer.

Only specific locations allow vehicles to access and exit expressways. You need to know how to approach and depart safely since expressway traffic frequently travels at or near the maximum speed permitted.

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When entering an expressway in the acceleration lane, a driver should search for a gap in traffic and adjust their speed to match that of the traffic. It's important not to stop unless absolutely necessary, and not to get too close to the vehicle ahead to avoid potential collisions.

When entering an expressway, in the acceleration lane, a driver should search for a gap in traffic and adjust speed to the speed of the traffic (option a). The purpose of the acceleration lane is to allow the driver to match the speed of the vehicles already on the expressway in order to merge safely. It's essential to bear in mind that the driver must ensure not to stop in the acceleration lane unless traffic is too dense, and stopping is absolutely necessary. A driver should not aim to get as close to the vehicle ahead as possible, as stated in option (d). This could result in a collision or pressure from vehicles behind which could also be aiming to merge into the same gap.

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The force between the rods are -3.486 x 10⁻⁴ N, the two rods are oppositely charged, the force is an attractive force.

Force is an influence on an object or system that will cause it to undergo acceleration, change in direction or shape, or be deformed. It is the result of an interaction between two bodies, and it is measured as a vector quantity with direction and magnitude. Force can be classified into contact forces, such as a push or pull, and non-contact forces, such as gravitation.

The force between two oppositely charged rods can be calculated using Coulomb's law. Coulomb's law states: F = k(q₁×q₂)/r²

where F is the force, k is a constant, q₁ and q₂ are the charges of the two rods (in coulombs), and r is the distance between the two rods (in meters).

Therefore, the force between the two rods in your example can be calculated as follows:

F = (8.99 x 10⁹ Nm²/C²)(7.5 x 10⁻⁷ C)( -5.1 x 10⁻⁵ C) / (0.09 m)²

F = -3.486 x 10⁻⁴ N

Since the two rods are oppositely charged, the force is an attractive force.

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Answer: 18 5.0 012

Explanation:

The equation that shows the relationship between X₁ and X₂ in the springs is X₁ = 4X₂.

From the complete question, for case I, the two springs stretch up to the distance of X₁. Therefore, f = mg = kx₁.

For case 2, f = mg = kx₂.

Therefore, we'll equate the equations. This will be:

Kx₁ = Kx₂

(K/2)x₁ = (2k)x₂

K(x₁/2) = k(2x₂)

X₁/2 = 2x₂

X1 = 2 × 2x₂

X₁ = 4X₂.

In conclusion, X₁ = 4X₂.

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X₁ = 4X₂ is the equation that shows the connection between X₁ and X₂ in the springs.

The force required to extend or compress a spring by some distance scales linearly with respect to that distance is known as the spring force. Its formula is

F = kx

For case 1;

f=mg=kx₁

For case 2;

f=mg=kx₂

After equating the equation we get;

\(\rm Kx_1 = Kx_2 \\\\ \frac{K}{2}x_1 = (2k)x_2 = k(2x_2) \\\\ \frac{x_1}{2} =2x_2\\\\ x_1 = 4x_2\)

Hence  X₁ = 4X₂ is the equation that shows the connection between X₁ and X₂ in the springs.

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Answer:

multiplication; 2.99 x 10^8

Explanation:

V = (ε x u)^-1/2 = 1/(8.85 x 10^-15 x 4π x 10^7)^1/2 = 2.99 x 10^8

Answer:

false

Explanation:

As both parents contribute half of the new organism's genetic material, the offspring will have traits of both parents, but will not be exactly like either parent

Answer:

False

Explanation:

The only time you end up like your parent is asexual reproduction

Answer:

A, 5.1 m [N]

Explanation:

1.7 times three equals 5.1, and since the runner was running north, the direction was north.

Answer:

The equivalent series resistance of a capacitor is the internal resistance that appears in series with the capacitance of the device. Almost all capacitors exhibit this property at varying degrees depending on the construction, dielectric materials, quality, and reliability of the capacitor.

Explanation:

Hope this helps

A pet turtle weighing 10 N is roughly equal to 1 kg in bulk.The kilogram-force (kgf or kg-f), also referred to as the kilopond (kp).

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Uranus and Neptune are unusual in the Nice model of solar system formation because they are in different regions than the other planets.

The Nice model proposes that the giant planets formed much further from the Sun than the inner planets.

Specifically, Uranus and Neptune are thought to have formed at a distance of 5-20 AU, much farther than the other planets.

They are also thought to have moved outwards from this region, and then migrated back inwards to their current positions.

This outward migration is known as "jumping Jupiter", as it was caused by the gravitational influence of Jupiter.

Uranus and Neptune are also thought to have been affected by the orbits of two hypothetical planets called "Phaeton" and "Tyche".

The presence of these planets, which are no longer believed to exist, would have affected the orbits of the two outermost planets, resulting in them having the highly inclined orbits they currently possess.

Uranus and Neptune are unusual in the Nice model of solar system formation because they are in different regions than the other planets,

And their orbits are thought to have been affected by the gravitational influence of Jupiter and two hypothetical planets, Phaeton and Tyche.

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The proton was subjected to an electric force of 4.4 * 10-16 N when this figure and the electric field's value from the formula are plugged in.

A proton experiences an electric force that is pertinent to this issue in a steady electric field. The size of the electric field in this issue is 2.75 * 103 N/C. A proton feels an electric force when it is in this field.

The proton charge and the strength of the electric field are factors in a calculation we use to determine the size of this force. The charge of a proton is 1.6 * 10-19 coulombs, which is quite little.

The proton was subjected to an electric force of 4.4 * 10-16 N when this figure and the electric field's value from the formula are plugged in.

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The filtration slits between the cells of the glomerular capillaries allow the passage of filtered material into the capsule space, facilitating the formation of urine. This process is essential for maintaining proper kidney function and eliminating waste products from the body.

The filtration slits between the cells of the glomerular capillaries permit the ready passage of filtered material into the capsule space. This process is known as filtration and is a key step in the formation of urine.
Here's a step-by-step explanation of how this process occurs:

1. Filtration begins in the glomerulus, which is a network of tiny blood vessels located in the kidney.
2. Blood enters the glomerulus through the afferent arteriole and exits through the efferent arteriole.
3. The high pressure in the glomerulus forces small molecules such as water, ions, glucose, and waste products to pass through the filtration slits.
4. The filtration slits are located between the cells of the glomerular capillaries and are formed by specialized cells called podocytes.
5. These podocytes have finger-like extensions called foot processes that wrap around the capillaries and leave narrow gaps between them.
6. The size of these filtration slits is such that they allow small molecules to pass through, while larger molecules like proteins are prevented from passing into the capsule space.
7. The filtered material, known as the filtrate, then enters the capsule space of the nephron.
8. From there, it continues through the renal tubules, where further reabsorption and secretion occur to produce urine.

In conclusion, the filtration slits between the cells of the glomerular capillaries allow the passage of filtered material into the capsule space, facilitating the formation of urine. This process is essential for maintaining proper kidney function and eliminating waste products from the body.

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According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

option B is the correct answer.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.

Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

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Answer:

its B

Explanation:

F=m*a

T = 142N

Work = Force x distance

distance = 6.1 M

Force = 142 x cos 37 = 113.4 N

W= 113.4N x 6.1M = 691.78 J