Help me please! I really need it!

The increase in kinetic energy required to raise the speed of the electron from 0.81c to 0.91c is 0.023 joules

The kinetic energy of a particle can be found using the equation:

K = (gamma - 1) * m_0 * c^2

where K is the kinetic energy,

m_0 is the rest mass of the particle,

c is the speed of light, and

gamma is the Lorentz factor given by:

gamma = 1 / √(1 - (v/c)^2)

We have that the initial speed of the electron is v1 = 0.81c,

we can find the initial kinetic energy:

K1 = (gamma1 - 1) * m_0 * c^2

gamma1 = 1 / √t(1 - (v1/c)^2)

K1 = (gamma1 - 1) * m_0 * c^2

K1 = (1 / √(1 - (0.81)^2) - 1) * m_0 * c^2

Hence we find the final speed v2 = 0.91c,

the final kinetic energy K2 = (gamma2 - 1) * m_0 * c^2

gamma2 = 1 / √(1 - (v2/c)^2)

K2 = (gamma2 - 1) * m_0 * c^2

K2 = (1 / √(1 - (0.91)^2) - 1) * m_0 * c^2

In conclusion, we subtract the initial kinetic energy from the final kinetic energy to find the increase in kinetic energy:

dK = K2 - K1

dK = (1 / √t(1 - (0.91)^2) - 1) * m_0 * c^2 - (1 / √t(1 - (0.81)^2) - 1) * m_0 * c^2

dK = 0.023 joules

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Answer:

\(30 \div 33750 = 0.008888\)

Answer:

11

Explanation:

i've been in k12 and i got an a on this anser

Answer:

T is less than or equal to 19 N

Explanation:

Answer:

I mean, correct me if I'm wrong for some reason, but I think its Matter?

Answer:

The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

Explanation:

Answer:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. While an endothermic process absorbs heat and cools the surroundings

Explanation:

Answer:

Basically, endothermic feels cooler to touch than exothermic.

Explanation:

Endothermic reactions are just reactions that emit energy (in form of heat) to its surroundings. Exothermic ones, on the other hand, draw energy from its surroundings to occur.

Always think - "Endothermic is cool. Exothermic is not cool."

Rock layer that can be porous but must have very low to no permeability is option A. above oil and natural gas

Soil permeability is a measure of a soil's ability to allow water to flow through it. It is determined by the size, shape, and arrangement of the soil particles, as well as by the presence of pores or fractures in the soil.

Soils with high permeability allow water to flow through them quickly, while soils with low permeability do not allow water to flow through as easily. Permeability is important for both agricultural and engineering applications, as it can affect water availability for plants, and the stability of foundations for buildings and other structures.

Therefore, the correct answer is as given above

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The complete question goes thus:

Rock layer that can be porous but must have very low to no permeability.

A. above oil and natural gas

B. Under oil and natural gas

C. Coal, oil, natural gas

D. anthracite

Answer:

Well I think that 16 year olds should get a job because this could benefit them. They can learn to save and manage there own money. And I think that 16 yrs olds should get a job because this can help them in positive way.

Explanation:

Hope this made sense and help!!!

Answer:

PLATO!!!!! THESE ARE RIGHT!!! OTHERS ARE NOT CORRECT. I JUST GOT IT RIGHT ON PLATO

Explanation:

1. federal water pollution control act

2.nature conservancy

3. clean air act

4. water quality act

5. endangered species preservation act

6. clean water act

7. energy supply and environmental coordination act

8. eastern wilderness act

9. toxic substance act

10. intergovernmental panel on climate change (IPCC).

Gravity and wind speed are vector quantity , Temperature , Volume , Number of pages in a book are the scalar quantity

In terms of their size and direction, the physical quantities may be divided into scalars and vectors.The examples of physical quantities that can be sort into vectors and scalars are temperature, gravity, volume, number of pages in a book, wind speed and direction, etc.

The following quantities are:

Temperature- The temperature is a scalar number since it just needs the magnitude (heat content) and not the direction.

Gravity - It is comparable to the force with which the Earth pulls an item that is always pointed toward its center. The amount is a vector since both magnitude and direction define it.

Volume - it is the pitch of a sound wave which is nothing but a form of energy which causes the sensation of hearing. Since the direction is not required to measure a sound level (determined by the corresponding frequency of the sound wave) but the only magnitude, therefore, it is a scalar.

The amount is a scalar since the number of pages in a book is entirely determined by a numerical value without the requirement for a direction.

Wind Speed and Direction - Since both the wind's magnitude in terms of speed and direction are necessary, the quantity is a vector.

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Answer:

Negative 3

Explanation:

Bc scientific notation is the zeros either ahead or behind the actual numbers

Answer:

-3

Explanation:

Answer:

22

Explanation:

Answer:

condensation, precipitation, evaporation, transpiration

Explanation:

condensation is when gas condenses into liquid, precipitation is when water comes from the sky like in rain, evaporation is when water is converted from liquid to gas, transpiration is when water is evaporated from leaves.

In the given scenario, we have a metal equilateral triangle with sides measuring 20 cm. This triangle is placed halfway into a magnetic field with a magnitude of 0.50 T (Tesla). The magnetic field can exert a force on the triangle due to the interaction between the magnetic field and the electric currents induced in the metal.

To determine the force acting on the triangle, we can utilize the equation F = BIL, where F represents the force, B is the magnetic field, I is the electric current, and L is the length of the conductor in the magnetic field.

Since the triangle is made of metal, it is a good conductor, and electric currents will be induced in it when it is placed in the magnetic field. In this case, we can consider each side of the triangle as a conductor.

The length of each side of the equilateral triangle is given as 20 cm. As the triangle is halfway into the magnetic field, we can consider only half the length of each side (10 cm or 0.1 m) as the effective length in the magnetic field.

To calculate the force, we need to determine the current. Since the current is induced in the triangle due to the magnetic field, we need more information about the situation. Without further details, it is not possible to calculate the exact value of the current and consequently, the force acting on the triangle. Therefore, additional information is required to provide a precise answer.

In summary, to calculate the force on the metal equilateral triangle in the given magnetic field, we need more information about the induced current in the triangle. The force can be determined using the formula F = BIL, where B is the magnetic field, I is the current, and L is the effective length of the conductor in the magnetic field.

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Answer:

Explanation:

If angle of incidence and angle of refraction be i   and r respectively ,

sini / sinr = μ ( refractive index )

sin r = sin i / μ

If angle of incidence i be constant and medium becomes denser that means μ becomes higher in value , the value of sin r will be low ( because of increase in value of denominator )

As sin r decreases , r also decreases also.

Hence when medium becomes denser , angle of refraction becomes less .

With a speed of 4 seconds, the skydiver is the fastest option - B is correct.

An example of a friction force is air resistance.

There are no two solid surfaces in contact is air resistance.

The frictional force that affects an object and the air surrounding it is known as air resistance.

In other words, friction always pushes against the direction in which the skydiver is moving, slowing the skydiver down.

The pull of gravity on the skydiver, or their weight force, is greater than the air resistance slowing them down, so when they jump out of the plane, their speed would increase.

The weight force of a person never changes.

The person's air resistance will be equal to their weight force.

By doing this, the skydiver would move at a constant speed.

Forces must be equal to zero in order to move at a constant speed.

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Complete question attached below.

Answer: B) Venus, If distance from the Sun were the only factor considered, Venus would be the only habitable option among the given choices. The Moon lacks a significant atmosphere, and Mercury is too close to the Sun, resulting in extreme temperatures.

If distance from the Sun were the only factor considered, Venus would be the only habitable option among the given choices. While the Moon lacks a substantial atmosphere and experiences extreme temperatures, and Mercury is too close to the Sun with extreme temperature variations, Venus has a unique characteristic. Despite being closer to the Sun than Earth, Venus has a thick atmosphere that creates a greenhouse effect, trapping heat and raising its surface temperature to extremely high levels. This thick atmosphere could potentially provide a stable environment for liquid water and make Venus habitable, at least in terms of surface conditions. However, other factors such as the composition of the atmosphere and the presence of other essential elements would also influence habitability.

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The number of oscillations of the toy in a second is 1.25.

The given parameter:

The frequency of an object is calculated as follows;

\(f = \frac{n}{t} \\\\\)

where;

The number of oscillations of the toy in a second is calculated as follows;

\(1.25 = \frac{n}{1} \\\\n = 1.25\)

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Answer:

2 s

Explanation:

Since the car is accelerating from a stop, it has an initial velocity of 0 m/s. The acceleration of the car is 43 m/s².

We want to find the time it takes for the car to have a final velocity of 86 m/s.

We can relate all four of these variables (initial velocity, final velocity, acceleration, time) in this kinematic equation:

Substitute the known variables into the equation.

It will take the car 2 seconds to reach 86 m/s.

Answer: 2 seconds

Explanation: In physics (m/s^2) meters per second squared or meters per second per second, literally means by how many meters per second the velocity changes every second. In this case it is 43. The car moves 43 meters a second per every second. That means that the car would move 86 meters in 2 seconds, 129 in 3 seconds, and so on.

(+) In cases like this, the fastest way to find the answer is to do simple division.

86/43 = 2

(Example) Look at it this way, the car is going 45 miles per hour. How long will it take to reach 90 miles? If the car goes 45 miles per hour, that means in 2 hours it will reach 90 miles.

90/45 = 2

Simple division.

Your very welcome, let me know if you have any questions. :-)

-szimbitskyy

Answer:

Explanation:

Discussion

The ones that are certain are

If you have a normal, and the player slides into 2nd, and stops (which he must before he is tagged), then there must be friction involved. There must be gravity, or he would keep going up.

I don't think there is tension. There might be some Air Resistance, but that force is very tiny. Don't be surprised if you answer includes Air Resistance, but I won't try it to begin with.

Answer:

Extrusive rocks form on the Earth's surface from lava, which is magma that has risen from underground. Intrusive rocks are formed when magma cools and solidifies within the planet's crust.

That's the difference

(a) The greatest magnification that can be obtained using two lenses is given by the ratio of their focal lengths. Therefore, we need to find the combination of lenses that gives the largest ratio.

The largest ratio is obtained by using the lenses with the shortest and longest focal lengths. Therefore, the greatest magnification is given by: Magnification = focal length of the longer lens / focal length of the shorter lens  Magnification = 28.0 cm / 4.00 cm Magnification = 7.00 To obtain the magnification of a telescope, we need to find the ratio of the focal length of the objective lens to the focal length of the eyepiece lens.

In this case, we are trying to find the combination of lenses that gives the largest ratio, which corresponds to the greatest magnification. We are given four lenses with different focal lengths. To find the largest magnification, we need to choose two lenses that give the largest ratio. This corresponds to choosing the lens with the longest focal length as the objective lens, and the lens with the shortest focal length as the eyepiece lens.

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One of the options that are the most appropriate choice of Gaussian surface to use in this problem is a finite closed cylinder whose axis coincides with the axis of the rod and whose cross section has radius r.

This is because the charged cylinder which is of infinite length as mentioned and hence there won't be any electric flux coming out of the top and bottom flat surfaces.

Now, to find out the magnitude of the electric field, we shall have to apply Gauss's law,

\(\int\limits^ _ {} \,\)Eda=  Q enclosed/E

Gaussian surfaces would be the simplest to use to determine the electric field intensity near a long, straight, charged wire, is a cylinder whose axis coincides with the wire.

The Gaussian surface is primarily known as a closed surface in a  three-dimensional space (3-D) such that the flux of a vector field is calculated.

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To find the speed of the elevator, we need to divide the total distance traveled by the time taken. The formula for speed is:

Speed = Distance / Time

In this case, the distance traveled by the elevator is 210 m and the time taken is 35 sec. Plugging these values into the formula, we get:

Speed = 210 m / 35 sec

Simplifying the calculation, we find:

Speed = 6 m/s

Therefore, the speed of the elevator is 6 meters per second.

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Answer:

yes

Explanation:

because newtons laws

The two options that help explain why the rotation of a conducting loop between the poles of a magnet generates a potential difference are:

(A) The magnetic field changes its direction relative to the loop.

(D) The angle between the loop and the magnetic field changes.

In a simple generator, a conducting loop rotates between the poles of a magnet, resulting in the generation of a potential difference. Two factors contribute to this phenomenon.

Firstly, as the loop rotates, the magnetic field lines passing through it change their direction relative to the loop (option A). This change in the magnetic field induces a changing magnetic flux through the loop.

According to Faraday's law, this changing magnetic flux induces an electromotive force (EMF) or a potential difference across the loop. Secondly, as the loop rotates, the angle between the loop and the magnetic field changes (option D).

This change in angle alters the component of the magnetic field perpendicular to the loop, further contributing to the generation of a potential difference.

Together, these changes in the magnetic field and the angle between the loop and the magnetic field lead to the generation of a potential difference, enabling the functioning of the generator.

Therefore the correct options are (A) The magnetic field changes its direction relative to the loop and (D) The angle between the loop and the magnetic field changes.

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Answer:

Explanation:

Overgrazing and woodcutting are responsible for most of the desertification of rangelands, cultivation practices inducing accelerated water and wind erosion are most responsible in the rain-fed croplands, and improper water management leading to salinization is the cause of the deterioration of irrigated lands.