the electrons in a tv picture tube are accelerated from rest through a potential difference of 25kv. What is the speed of the electrons after they have been accelerated by this potential difference?

Answer:

 its not long dummy, its your imagination

Explanation:

According to special relativity, one can travel at increased rates. However, this is only possible when moving at very high speeds approaching the speed of light. When an object moves at high speeds, the time slows down, and the length of the object appears to be shortened.

These observations are known as time dilation and length contraction. Time dilation refers to the difference in the elapsed time measured by two observers, where one is stationary, and the other is moving at a constant velocity relative to each other. The faster the moving observer, the slower time appears to be for them. Length contraction, on the other hand, refers to the phenomenon where an object appears to be shorter in length when it's moving at high

This effect is more noticeable as the speed of the object approaches the speed of light. As a result, traveling at very high speeds can allow one to cover great distances in less time, which can be used for space exploration and other scientific research. However, it's worth noting that the effects of relativity are only noticeable at very high speeds, which are currently impossible to achieve with our current technology.

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The mass, volume, and density of the yellow block can be determined by measuring the mass, volume, and then calculating the density.

Mass is the measure of the amount of matter an object contains. It is measured in kilograms (kg) or grams (g). Mass is an intrinsic property of an object, meaning it does not depend on its location or the gravity acting on it.

For example, if the mass of the yellow block is 10 kg and the volume is 2 m3, the density of the yellow block would be 5 kg/m3.
The mass, volume, and density of the red block can be determined in the same way.
The order of the block colors from smallest to largest mass would depend on the exact mass of each block. If the yellow block has a mass of 10 kg and the red block has a mass of 15 kg, then the order would be yellow, red. However, if the yellow block has a mass of 15 kg and the red block has a mass of 10 kg, then the order would be red, yellow.

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The ring accelerates in the direction of the net unbalanced force. Thus option C is the correct answer.

According to Newton's second law of motion, the net force acting on an object is equal to the mass of the object multiplied by its acceleration. If the forces exerted by the two students in the tug-of-war are unbalanced, there will be a net force acting on the steel ring.

The direction of this net force will be in the direction of the stronger force. As a result, the ring will accelerate in the direction of the net unbalanced force. This means that the ring will begin to move, and its velocity will change as long as the net force is applied.

Since the steel ring is accelerating, it can no longer be at rest, and it will not move at a constant velocity. The ring will move in the direction of the stronger force until the forces exerted by the students are balanced again.

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The microscope has two sets of lenses, one in the eyepiece and one in the objective lens. The amount of light is changed by adjusting the diaphragm of the microscope. The diaphragm controls the amount of light that passes through the stage and is focused on the object being viewed.

There are two types of diaphragms in a microscope: the iris diaphragm and the disk diaphragm. The iris diaphragm is adjustable, while the disk diaphragm is preset. The iris diaphragm is located near the base of the microscope and can be adjusted to control the amount of light that enters the microscope. It works like a camera aperture, opening or closing to let in more or less light. When the iris diaphragm is closed, less light enters the microscope, and the image appears darker.

When the iris diaphragm is open, more light enters the microscope, and the image appears brighter. By adjusting the iris diaphragm, you can get the best possible image of the object being viewed. To summarize, the diaphragm is the part of the microscope that you adjust to change the amount of light. The iris diaphragm is adjustable, while the disk diaphragm is preset. By adjusting the diaphragm, you can get the best possible image of the object being viewed.

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Answer:

length

Explanation:

The path of the light gets changed and the change in the path of light is obtained from the reflection and refraction process

Light is electromagnetic radiation and travels in space without any medium. It possesses dual nature. The wave nature of light is reflection, refraction, and interference.

The path of light gets changes through the process of reflection and refraction. The incident right after hitting the transparent objects, the light ray moves in the opposite direction. The bouncing back of the light is called Reflection.

When light rays enter from the rarer to denser medium or denser to rarer medium, the path of light gets changed and the speed of the light decreases. This process is called refraction.

The path of light gets changed by using transparent objects like mirrors, lenses, and prism.

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Answer:

v=u+at

24=0+at

24=a×6

a=4m/s

hence

s=ut+at^2÷2

s=36m

Explanation:

since the car is brought to rest the u=0

Answer:

A foundation.

Explanation:

Balance can be considered a foundation for other physical skills because it is essential for performing many movements and activities effectively and efficiently. Having good balance helps individuals maintain stability and control over their body, which is important for actions like walking, running, jumping, and even standing still. Without good balance, individuals may struggle with coordination, experience falls or injuries, or have difficulty performing tasks that require precise movements. Therefore, developing and maintaining good balance can serve as a foundation for other physical skills and overall physical health.

Answer:

0.23N for the speed

at the bottom of the circle

Answer:

A tidal is a type of wave is most affected by gravity from the sun and the moon.

Explanation:

I hope it helps ❤❤

Tidal wave is the type of wave which is most affected by gravity from the

Sun and the moon

The sun and the moon's gravitational pull results to the tidal force being

generated. The tidal force from the tidal wave generated has some effects

on the earth.

It causes the  Earth and its water content to bulge out on two sides of the

earth. It bulges in the area with the highest proximity to the moon and areas

with the lowest proximity. This is responsible for the formation of high tides

in  water bodies.

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Answer:

107.5 mph

Explanation:

m/s converted to mph, then calculate difference in speed is relativity

Light radiation from a star travels through the vacuum of space and is seen by someone on Earth through a process involving emission, propagation, and detection.

The process of light radiation from a star reaching an observer on Earth involves several stages. Firstly, light is emitted from the star's surface due to various processes like nuclear fusion. These emitted photons travel in straight lines in all directions through the vacuum of space.

As the light propagates through space, it encounters no obstruction or medium, allowing it to travel vast distances. The speed of light, which is approximately 299,792 kilometers per second, enables it to cover enormous distances within a relatively short time.

Once the light radiation reaches Earth, it enters the planet's atmosphere. In the atmosphere, the light can interact with gas molecules and other particles present. These interactions can cause scattering, absorption, and other phenomena that affect the light's path.

Finally, if the light radiation manages to pass through the atmosphere without significant scattering or absorption, it reaches the observer's eyes or instruments on Earth. The photons enter the eyes and interact with the retina, which contains specialized cells called photoreceptors that convert the incoming light into electrical signals.

These signals are then processed by the brain, resulting in the perception of the star's light.

Overall, the journey of light radiation from a star involves emission from the star's surface, propagation through the vacuum of space, interaction with the Earth's atmosphere, and detection by an observer on Earth, allowing us to see and study distant celestial objects.

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Radio/TV waves has the lower energy than microwaves.

Answer:

the answer to your question is c

The electric flux that flows through the loop is 4.27 Nm²/C, and the loop's normal ought to be rotated by about 39.5 degrees.

Electric flux is a characteristic of an electric field and refers to the number of electric field lines that cross a specific area. Electric field lines, according to this theory, begin with positive electric charges and end with negative electric charges.

Part a: The following formula must be used to determine the electric flux through the loop:

= E A cos() Since the electric field is parallel to the x-axis and the loop is circular, the area of the loop can be calculated as follows:

By substituting the given values for A = r², we obtain:

A = (0.177m)² = 0.0985 m² = 67.9° = 1.184 radians = (47.6 N/C)  (0.0985 m²)  cos(1.184)  4.27 Nm²/C Part (b) In order to determine the angle at which the flux through the loop becomes 0.304 Nm²/C, we can rewrite the equation for electric flux to account for:

= cos(-1)(/(EA))) By substituting the values provided, we obtain:

= cos(-1)(0.304 Nm²/C / (47.6 N/C  0.0985 m²))  = 39.5°; consequently, the loop's normal should be rotated by approximately 39.5°.

electric flux is a property of an electric field that can be described as the number of electric lines of force—also known as electric field lines—that cross a specific area. Electric field lines are thought to start with positive electric charges and end with negative electric charges.

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The maximum likelihood estimates (MLBs) of the three parameters (p, q, σ²) in each of the 10 realizations of length n = 200, generated from an ARMA (1,1) process with q = 0.5 and σ² = 1, were calculated and compared to the true values.

To estimate the parameters of the ARMA (1,1) process, the maximum likelihood method is used. In each realization, the MLBs of p, q, and σ² are obtained by maximizing the likelihood function.

The likelihood function represents the probability of observing the given data under the assumption of specific parameter values. The MLBs are the parameter values that maximize this probability.

By comparing the estimated values to the true values, we can assess the accuracy of the estimation. If the estimated values are close to the true values, it indicates that the maximum likelihood estimation is performing well in capturing the underlying parameters of the ARMA (1,1) process.

However, if there are significant differences between the estimated and true values, it suggests that the estimation may be biased or inconsistent.

By examining the discrepancies between the estimated and true values across the 10 realizations, we can evaluate the overall performance of the maximum likelihood estimation method in estimating the parameters of the ARMA (1,1) process.

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Answer:

The work you did in climbing the stairs is the force you applied (your weight) times the distance you moved upward (the height of the stairs.) So yes, climbing stairs is work done.

Explanation:

Hope this helped, nya~ :3

When the runners meet, Funner B is approximately 2012.73 meters west of the flagpole. The distance between the runners and the flagpole when they meet, is their individual distances from the flagpole at any given time.

Let's denote the distance of Funner A from the flagpole as DA and the distance of Funner B from the flagpole as DB. We want to find the value of DB when the two runners meet.

Initially, Funner A is 1.0 m west of the flagpole, so DA = -1.0 m. Funner B is 2.0 mi east of the flagpole, so DB = 2.0 mi.

Funner A is running with a constant velocity of 4.0 m/h due east, and Funner B is running with a constant velocity of 7.0 m/h due west.

Let's assume that they meet after t hours. The distance covered by Funner A during this time is given by DA = 4.0 m/h × t, and the distance covered by Funner B is given by DB = 2.0 mi - 7.0 m/h × t.

The time at which they meet, we set DA equal to DB:

4.0 m/h × t = 2.0 mi - 7.0 m/h × t

For t, we can convert the units of the distances to a common unit, such as meters:

4.0 m/h × t = 2.0 mi × (1609.34 m/mi) - 7.0 m/h × t

Simplifying the equation gives:

4.0 m/h × t + 7.0 m/h × t = 2.0 mi × (1609.34 m/mi)

11.0 m/h × t = 2.0 mi × (1609.34 m/mi)

t = 2.0 mi × (1609.34 m/mi) / 11.0 m/h

Calculating the value of t gives:

t ≈ 291.39 hours

Now that we know the time at which they meet, we can substitute this value back into either DA or DB to find the distance between the runners and the flagpole at that time.

Using DB = 2.0 mi - 7.0 m/h × t:

DB ≈ 2.0 mi - 7.0 m/h × (291.39 hours)

DB ≈ -2012.73 m

Therefore, when the runners meet, Funner B is approximately 2012.73 meters west of the flagpole.

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The three types of equilibrium in an object are;  stable, unstable, or neutral equilibrium.

The term equilibrium refers to a situation in which all the forces acting on an object are balanced such that the object does not move. The question is incomplete as the images are missing.

There are three types of equilibrium:

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When an object standing on the floor is tipped, the height of its center of gravity (cg) for each case as stable, unstable, or neutral may increase, decreased and remain same respectively.

Equilibrium is the location of the body, in which the body be static or in motion and does not change it with respect to time.

The equilibrium of an object can be classified in the 3 following types.

When an object standing on the floor is tipped, the height of its center of gravity (cg) may or may not change.

The stability of object demands in the center of gravity. Lower the value of CG, results in more stable object. For each case,

Thus, when an object standing on the floor is tipped, the height of its center of gravity (cg) for each case as stable, unstable, or neutral may increase, decreased and remain same respectively.

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Answer: the atom is mostly empty space with a tiny, dense, positively-charged nucleus

Explanation: Rutherford's gold foil experiments involved firing positively charged alpha particles at a piece of gold/metal foil. The alpha particles that were fired at the gold foil were positively charged. Most of the time, the alpha particles would pass through the foil without any change in their trajectories, which is what was expected if JJ Thomson's plum pudding model of the atom was correct. However, occasionally the alpha particles would be deflected to some degree, and sometimes an alpha particle would bounce back directly toward the experimenter. Rutherford likened this to firing a 15-inch artillery shell at a sheet of tissue paper and the shell came back to hit you.

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Rutherford's gold foil experiment demonstrated the concept of the nucleus of the atom.What is Rutherford's gold foil experiment?

Rutherford's gold foil experiment is an experiment that was conducted by Ernest Rutherford in 1911 to determine the structure of the atom. Rutherford bombarded alpha particles at thin gold foil and noted their trajectory and path.The experiment was conducted to answer the prevailing model of the atom's structure, which was the Thomson atomic model.

According to the Thomson atomic model, the atom's positive charge is evenly distributed throughout the atom, like raisins in a pudding. Rutherford's experiment refuted this hypothesis and provided a new model that supported his findings.

The findings of the gold foil experiment:

Rutherford's experiment led him to conclude that the positive charge of the atom is concentrated in the nucleus, a central part of the atom. In this model, electrons orbit the nucleus, like planets orbiting the sun.

Rutherford's gold foil experiment demonstrated that the atom is made up of mostly empty space, with a small, dense, and positively charged nucleus at the center. This discovery paved the way for further research into atomic structure and the discovery of subatomic particles like protons and neutrons.

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Answer is

9.773m/s^2

-----------------------------------------------------------------------------

Given,

h=8848m

The value of sea level is 9.08m/s^2. So, Let g′ be the acceleration due to the gravity on Mount Everest.

g′=g(1 − 2h/h)

=9.8(1 - 6400000/17696)

=9.8(1 − 0.00276)

9.8×0.99724

=9.773m/s^2

Thus, the acceleration due to gravity on the top of Mount Everest is =9.773m/s^2

-----------------------------------------------------------------------

hope this helps :)

Answer:

\(\huge\boxed{\sf PE=2.8 \ Joules}\)

Explanation:

Spring constant = k = 140 N/m

Displacement = x = 0.2 m

Elastic Potential Energy = PE = ?

\(\displaystyle PE= \frac{1}{2} kx^2\)

\(\displaystyle PE=\frac{1}{2} (140)(0.2)^2\\\\PE=(70)(0.04)\\\\PE=2.8 \ Joules\\\\\rule[225]{225}{2}\)

Answer:

C. Particles that make up a nucleus

Explanation:

A P E X

Answer:

Physics is a natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.

The minimum diameter of the brass wire that can withstand a tensile force of 350 N without breaking is approximately 0.052 m or 52 mm.

To determine the minimum diameter of the brass wire that can withstand a tensile force of 350 N without breaking, we need to use the formula for tensile stress:

σ = F/A

We can rearrange the formula to solve for the cross-sectional area:

A = F/σ

We also need to use the formula for the cross-sectional area of a circle:

A = π\(r^2\)

where r is the radius of the wire.

Substituting the first equation into the second equation, we get:

A = π\(r^2\) = F/σ

Solving for r, we get:

r = √(F/πσ)

Substituting the values given, F = 350 N and assuming a tensile strength for brass of

σ = 100 x \(10^6\) Pa

= 100 x \(10^6\) N/m,

we get:

r = √(350 N / (π x 100 x \(10^6\)  N/m))

≈ 0.026 m

Therefore, the minimum diameter of the brass wire that can withstand a tensile force of 350 N without breaking is approximately 0.052 m or 52 mm.

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The angle of incline of the hill above the horizontal is 8.81°.

Since the hill has a 15.5% grade is one that rises 15.5 m vertically for every 100.0 m of distance in the horizontal direction.

The tangent of the angle of the incline of the hill, Ф is

tanФ = vertical rise/horizontal distance = grade of hill

Now, the vertical rise = 15.5 m and the horizontal distance = 100.0 m

So, substituting the values of the variables into the equation, we have

tanФ = vertical rise/horizontal run

tanФ = 15.5 m/100.0 m

tanФ = 0.155

Taking inverse tan of both sides, we have

Ф = tan⁻¹(0.155)

Ф = 8.81°

So, the angle of incline of the hill above the horizontal is 8.81°.

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Answer: At the antinodes of a standing wave, the wave is shaking very rapidly, causing those parts of the pizza to get hot. At the nodes, the wave is not shaking much at all, causing those parts of the pizza to stay cold."

Explanation:

antinodes vibrate and are the opposite of nodes which are stationary.

Some parts of the pizza are hot while others are still cold. Because the antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear.

The fact that there are locations along the medium that appear to be standing still is a feature of every standing wave pattern.

The term "node" refers to these sites, which are also known as "points of no displacement." Other sites along the medium are subjected to vibrations with substantial positive and negative displacements.

During each vibrational cycle of the standing wave, these are the locations that experience the most displacement. These points are termed "antinodes" because they are the polar opposites of nodes.

The antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear. The wave isn't moving very much at the nodes, therefore those areas of the pizza stay cold."

Hence some parts of the pizza are hot while others are still cold.

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Answer:

F = 7.7 [N]

a = 2.2 [m/s²]

Explanation:

In the attached picture we see the forces on the wooden block, the total force is obtained by means of the sum of the pushforce and the friction force.

\(F_{total}=12.5-4.8\\F_{total}=7.7[N]\)

Now we must apply Newton's second law, which tells us that the total force on the body must be equal to the product of mass by acceleration.

\(F=m*a\)

\(7.7=3.5*a\\a=2.2[m/s^{2} ]\)

probably a little late on this but the dude got everything wrong heres a screenshot of the answers.

Solubility: the ability of a substance to dissolve in another.

Density: the amount of mass in a given volume.

Buoyant force: the upward force on an object in a fluid.

Conductivity: the ability of a substance to transfer heat or electricity.

Boiling point: the temperature at which a liquid becomes a gas.

Solubility can be defined as a measure of how readily a substance dissolves in a solvent to form a solution.

Density can be defined as mass all over the volume of an object.

Buoyancy can be defined as an upward force created by the fluid (liquid) displaced by an object.

Conductivity can be defined as the ability of an object, substance or body to transfer heat or electricity to another.

Boiling point is the temperature at which a physical matter changes phase from liquid to gas.

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