electrons are tiny particles with very small negative charges when two electrons are place near each other the electric force pushes them apart what does this tell you about the mass of an electron

Answer:

Work done, W = 181238.4 J

Explanation:

We have,

Mass of a car, m = 1500 kg

Initial speed, u = 50 km/h = 13.88 m/s

Final speed, v = 75 km/h = 20.84 m/s

Let W is the work done. It is equal to the change in kinetic energy of the car. So,

\(W=\dfrac{1}{2}m(v^2-u^2)\\\\W=\dfrac{1}{2}\times 1500\times ((20.84)^2-(13.88)^2)\\\\W=181238.4\ J\)

So, 181238.4 J of work was done by the car.

To model retroreflection, a modification to the OpenGL lighting model equation is necessary. The OpenGL lighting model is given by the following equation:

Ip = Kd * Id * N.L + Ks * Is * R.V^s

The above equation considers diffuse reflection and specular reflection. For retroreflection, only diffuse reflection is to be considered. This is achieved by replacing the specular term, Ks * Is * R.V^s, with a retroreflection term, which is given by the following equation:

Kr * Ir * (2 * (N.L) * N - L)

Where:

Kr represents the retroreflection coefficient, which depends on the reflective material used to make the shiny little reflective markers along the side of the road.

Ir represents the retroreflected intensity of the light source.

L represents the direction of the light source.

N represents the normal to the surface.

L.N represents the dot product of the direction of the light source and the normal to the surface.

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If the fringe spacing is 80 cm, the distance between the aerials  is 6.25 meter.

In physics, interference refers to the combined result of two or more wave trains travelling along intersecting or converging trajectories. The result is the result of adding the individual wave amplitudes at each place that is influenced by multiple waves.

Given: wavelength  = 50 mm = 50 × 10⁻⁴  m

the fringe spacing is = 80 cm = 0.80 m.

x = λD/d

d =  λD/x

= 50 × 10⁻⁴ × 1000/0.80 m

= 6.25 meter.

Hence,  the distance between the aerials  is 6.25 meter.

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The nuclear force between two charged particles is attractive, but Coulomb repulsion prevents two charged particles from getting close enough to interact. (K= 170 keV.)

We consider the value of the initial kinetic energy K that each deuteron must possess in order for them to come to rest when their surfaces meet to be the height of the Coulomb barrier.

if r is a deuteron's radius, then by the law of conservation of energy, we get,

2K=1/4πϵo. e²/2r

putting values, we get

K= 1/4πϵo. e²/4r=9x10^9x1.6x10^-19/4x2.1x10^-15=2.75x10^-14 J = 170 keV.

J is the potential energy. Divide it by the electron charge, or 1.6 x 1019C, to convert it to eV. Consequently, the 360keV potential barrier height for a head-on collision of two deuterons. In this work,

5 feet, 6 inches, or 66 inches, is the height of a human. 2.54 centimeters make up one inch (cm). Therefore, to convert your height from inches to centimeters, just multiply it by 2.54. The metric equivalent of a person who is 5 feet, 6 inches tall in this instance is 167.64 cm (66 x 2.54).

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The effect  the greenhouse effect had on the surface environment of Venus is option B which is It has raised the surface temperature by hundreds of degrees.

The greenhouse effect on Venus has had significant impacts on its surface environment.

Here are the effects.

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Answer:

f = 0.365 Hz

Explanation:

The angular velocity of a simple pendulum is

           w = \(\sqrt{g/L}\)

angular velocity and frequency are related

           w = 2π f

we substitute

           2π f = \(\sqrt{g/L}\)

Let's find the initial length of the pendulum

            L = \(\frac{g}{4\pi^2 } \ f_o\)

            L₀ = \(\frac{9.8}{4 \pi ^2} \ 0.4\)

            L₀ = 0.6206 m

Indicates that the length of the chord triples

             L = 3 L₀

             L = 3 0.6206

             L = 1.8618 m

let's find the frequency

             f = \(\frac{1}{2\pi } \ \sqrt{\frac{9.8}{1.8618} }\)

             f = 0.365 Hz

Answer:

30 cm

Explanation:

0.06 or  \(\frac{1}{15}\)

The lever has two “arms”:

The load arm is the portion of the lever directly connected to the load.

The effort arm is the portion of the lever to which we apply the effort, or input force.

The formula of the mechanical advantage(MA) of a lever is given as

MA = load/effort.

Given,

load = 2kg , effort = 30cm

MA = \(\frac{2}{30}\) = \(\frac{1}{15}\)

MA  = 0.06 cm

Therefore,

A 2-kg mass placed 30-cm to the left of the fulcrum is balanced by a 2-kg mass placed  0.06 cm to the right of the fulcrum.

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Answer:

trailers

Explanation:

Some vehicles, like trailers, have different rules for registration and renewal

Before registering a trailer, you will generally need to submit a signed title to verify your ownership. Alternately, you might be able to use a manufacturer’s statement of origin.

You will also need to sign and submit an application for the license and title of the trailer, along with receipts of applicable property taxes. Finally, you will need to pay the registration fees.

Before you make a trip to the DMV, make sure to have two forms of photo ID on hand to verify your identity when you speak with an agent. For example, your driver’s license might serve as the primary form of ID, and a passport could serve as the second.

If you do not have a passport, you could use a military identification card instead. If your only form of photo ID is your driver’s license, be sure to have other forms of identification on hand, such as your birth certificate and the card with your Social Security number.

Hence Some vehicles, like trailers, have different rules for registration and renewal.

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The maximum compression of the spring is 0.6 m.

The spring constant of the spring is calculated as follows;

F = kx

k = F/x

k = (5)/(0.1)

k = 50 N/m

The maximum compression of the spring is calculated as follows;

U = K.E

¹/₂kx²  = ¹/₂mv²

x² = (mv²)/(k)

x = √(mv²)/(k)

x = √(4.5 x 2²)/(50)

x = 0.6 m

Thus, the maximum compression of the spring is 0.6 m.

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The reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Given that the mass of a person is 60.0 kg and the elevator accelerates upwards with an acceleration of 4.90 m/s², we have to determine the reading on the scale.

Let F be the force exerted by the scale on the person. Then, by Newton's second law of motion, the net force acting on the person is Fnet= m * a

where m = 60.0 kg is the mass of the person and a = 4.90 m/s² is the acceleration of the elevator. Hence, the net force acting on the person is given by;

Fnet = 60.0 kg * 4.90 m/s²

Fnet = 294.0 N

Therefore, the scale reading is equal to the force exerted by the scale on the person. Since the elevator is accelerating upwards, the force exerted by the scale on the person is greater than the weight of the person, which is the force of gravity acting on the person.

The force of gravity acting on the person is given by;

Fg = m * g, where g = 9.81 m/s² is the acceleration due to gravity. Hence, the force of gravity acting on the person is given by;

Fg = 60.0 kg * 9.81 m/s²Fg = 588.6 N

Therefore, the scale reading is given by the sum of the force of gravity acting on the person and the net force acting on the person;

F = Fg + Fnet

F = 588.6 N + 294.0 N

F = 882.6 N

Thus, the reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

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Answer:

The laws of thermodynamics define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.

A train has an initial velocity of 44meter per second and an acceleration of 4meter per second.The final velocity after 10 seconds is 84m/s.

As we know,

Acceleration= Final velocity-Initial velocity /time.

where acceleartion = a=4m/s².

Initial velocity= u= 44m/s

let final velocity be v

Time =t = 10seconds.

Therefore, the equation is:

a=v-u/t

Substituting the values in the given equation, we get:

4=v-44/10

Now cross multiplying,

4×10 = v-44

40=v-44

40+44=v

v=84m/s

Therefore, the final velocity after 10 seconds is 84m/s.

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Answer:

I mean its probably a magnet so look at the fraction of the initial Kinetic Energy of magnets

Explanation:

Answer:

2 blocks/hours

Explanation:

(See the attachment for visual reference on direction & displacement)

Average velocity is total displacement over total time. It can be expressed mathematically as:

\(\displaystyle{\vec{v}_{\sf{average}} = \dfrac{\vec{s}_{\sf{total}}}{t_{\sf{total}}}}\)

Where \(\displaystyle{\vec{v}}\) is velocity and \(\displaystyle{\vec{s}}\) is displacement. Note that displacement means changes in position (final position - initial position)

Our initial position is at 0 blocks and then after travelling to the final destination, we see from the picture that it ends at position of 2 blocks. That can be calculated by subtracting 5 by 3 which will equal to 2 blocks.

Therefore:

\(\displaystyle{\vec{v}_{\sf{average}} = 2 \ \, \sf{blocks/hours}}\)

Emily walks 5 blocks east, 2 blocks north, 3 block west, and then 2 blocks south in an hour. Her average velocity is 2 blocks/hour.

To calculate Emily's average velocity, we need to find the total displacement (change in position) and then divide it by the total time taken.

Emily's total displacement can be found by summing the east-west and north-south components separately.

East-West displacement = 5 blocks east - 3 blocks west = 2 blocks east

North-South displacement = 2 blocks north - 2 blocks south = 0 blocks (no net movement)

Total displacement = √(East-West displacement)² + (North-South displacement)²

= √(2² + 0²)

= √4

= 2 blocks

Her total time taken is 1 hour.

Average velocity = Total displacement / Total time taken = 2 blocks / 1 hour = 2 blocks/hour

So, Emily's average velocity is 2 blocks/hour.

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The image of myself, when looking at a shiny Christmas tree ball with a diameter of 8.8 cm from a distance of 25.0 cm, is located 7.1 cm behind the ball.

To determine the location of the image, we can use the mirror equation:

1/f = 1/d₀ + 1/dᵢ

where f is the focal length of the mirror, d₀ is the object distance, and dᵢ is the image distance.

In this case, the Christmas tree ball acts as a convex mirror, and its focal length (f) can be approximated as half its radius, which is 4.4 cm.

Given that the object distance (d₀) is 25.0 cm, we can rearrange the mirror equation to solve for the image distance (dᵢ).

1/dᵢ = 1/f - 1/d₀

1/dᵢ = 1/4.4 - 1/25.0

1/dᵢ ≈ 0.2273 - 0.0400

1/dᵢ ≈ 0.1873

Taking the reciprocal of both sides gives:

dᵢ ≈ 1 / 0.1873

dᵢ ≈ 5.34 cm

Since the image distance (dᵢ) is positive, the image is formed on the same side as the object. Therefore, the image is located approximately 7.1 cm behind the ball (toward the observer).

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It is used to measure distance and the speed and agility of objects that are underwater.

The types of energy that move through the system are as follows: potential energy, kinetic energy, mechanical energy, and electrical energy.The water stored in the dams contains potential energy.

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The panspermia hypothesis is d. life has formed elsewhere and drifted to earth (e.g., via a comet).

Anaxagoras, a Greek philosopher, first proposed the idea of panspermia in the 5th century BCE. It states that spacecraft carrying unintentional microorganism contamination by means of space dust, asteroids, comets, planetoids, and meteorites spread life throughout the universe. Panspermia is a speculative theory that is not well-supported by mainstream scientists. It is argued by critics that it merely places life on another celestial body and does not provide an answer to the question of where life came from. Additionally, it is criticized for its inability to undergo experimental testing.

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Answer:

Explanation: The amount of force applied per given area is pressure...(F/A)

SI unit=Pascals(Newtons/m^2)

Currently, the largest optical telescope mirrors have a diameter of a  20 m , so option d is  is correct.

The largest optical telescope mirrors have a diameter of a 20m.However, please note that technology and advancements in telescope construction are continuously evolving, so it's possible that larger telescope mirrors have been developed since then. It's always a good idea to consult the latest sources or refer to current astronomical news for the most up-to-date information.An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image Therefore option d is correct option.

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Explanation:

When you pull the sock off of the blanket, the socks gain electrons out of blanket. This makes socks slightly negatively charged. The potential energy of the socks rise whereas potential energy of the blanket reduces. This happens because of exchange of electrons between socks and blanket.

According to the problem the velocity speed over the entire trip is 0 m/s.

Velocity speed is the rate of change of an object's position over a period of time. It is a vector quantity, meaning it has both magnitude and direction. Velocity speed is typically measured in meters per second (m/s) or kilometers per hour (km/h). The magnitude of velocity speed is the rate at which an object moves, while the direction indicates the path it takes. For example, if an object moves 10 meters in 5 seconds, its velocity speed would be 2 m/s in a certain direction. Velocity speed can also be calculated by dividing the distance traveled by the time taken to travel that distance.

This is because velocity is a measure of displacement over time,
and since the total displacement (from point A to point B and back to point A) is 0 meters,
the velocity speed is also 0 m/s.

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Answer:

see below

Explanation:

18.5 m in .46 sec  =  18.5 /.46 m/s  = 40.2 m/s

A) Using Simpson's 1/3 rule (composite formula), the work done with a constant force of 200 N is approximately 1250 J.

B) Using the MATLAB function trapz, the work done is approximately 7750 J.

Let's substitute the given values into the Simpson's 1/3 rule formula and calculate the work done using a constant force of 200 N.

A) Force (F) = 200 N (constant for all t)

Velocity (v) = 4t (0 ≤ t ≤ 5) and v = 20 + (5 - t)² (5 ≤ t ≤ 15)

Step size (h) = 0.25

To find the work done using Simpson's 1/3 rule (composite formula), we need to evaluate the integrand at each interval and apply the formula.

Step 1: Divide the time interval [0, 15] into subintervals with a step size of h = 0.25, resulting in 61 equally spaced points: t0, t1, t2, ..., t60.

Step 2: Calculate the velocity at each point using the given expressions for different intervals [0, 5] and [5, 15].

For 0 ≤ t ≤ 5: v = 4t For 5 ≤ t ≤ 15: v = 20 + (5 - t)²

Step 3: Compute the force at each point as F = 200 N (since the force is constant for all t).

Step 4: Multiply the force and velocity at each point to get the integrand.

For 0 ≤ t ≤ 5: F * v = 200 * (4t) For 5 ≤ t ≤ 15: F * v = 200 * [20 + (5 - t)²]

Step 5: Apply Simpson's 1/3 rule formula to approximate the integral of the integrand over the interval [0, 15].

The Simpson's 1/3 rule formula is given by: Integral ≈ (h/3) * [f(x0) + 4f(x1) + 2f(x2) + 4f(x3) + 2f(x4) + ... + 4f(xn-1) + f(xn)]

Here, h = 0.25, and n = 60 (since we have 61 equally spaced points, starting from 0).

Step 6: Multiply the result by the step size h to get the work done.

Work done: 1250 J

B) % Define the time intervals and step size

t = 0:0.25:15;

% Calculate the velocity based on the given expressions

v = zeros(size(t));

v(t <= 5) = 4 * t(t <= 5);

v(t >= 5) = 20 + (5 - t(t >= 5)).^2;

% Define the force value

F = 200;

% Calculate the work done using MATLAB's trapz function

\(work_t_r_a_p_z\) = trapz(t, F * v) * 0.25;

% Display the result

disp(['Work done using MATLAB''s trapz function: ' num2str(\(work_t_r_a_p_z\)) ' J']);

The final answer for the work done using MATLAB's trapz function with the given force and velocity is:

Work done using MATLAB's trapz function: 7750 J

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(a) To apply separation of variables, we assume T(x,t) = M(x)N(t), and substitute it into the heat conduction equation. This leads to two separate equations: d²M/dx² = -λ²M and dN/dt = -λ²/2N.

(b) For N(t), the ODE dN/dt = -λ²/2N has the general solution N(t) = \(Ce^{-\lambda^2t/2}\), where C is an arbitrary constant.

(c)  From the general expressions of M(x) and N(t), we combine them to define T(x,t) = (Acos(λx) + Bsin(λx). Hence, T(x,t) = \(5sin(4\pi x)e^(\lambda^2t/2)\).

(d) The arbitrary constant is determined as λ² = (4π)², which gives us λ = 4π. Thus, the final solution is T(x,t) = \(5sin(4\pi x)e^{-32\pi^2t}\).

a. To apply separation of variables, we assume T(x,t) = M(x)N(t), and substitute it into the heat conduction equation.

By differentiating twice with respect to x and once with respect to t, we obtain: ∂²M/∂x²N + 1/2M∂N/∂t = 0.

Since the left side depends on x and the right side depends on t, both sides must be equal to a constant, which we denote as -λ².

This leads to two separate equations:

d²M/dx² = -λ²M and dN/dt = -λ²/2N.

b. By solving the ODE for M(x), d²M/dx² = -λ²M,

we find that M(x) has the general form M(x) = Acos(λx) + Bsin(λx), where A and B are constants determined by the boundary conditions T(0,t) = T(3,t) = 0.

For N(t), the ODE dN/dt = -λ²/2N has the general solution:

N(t) = \(Ce^{-\lambda^2t/2}\), where C is an arbitrary constant.

c. From the general expressions of M(x) and N(t), we combine them to define:

T(x,t) = (Acos(λx) + Bsin(λx))\(Ce^{-\lambda^2t/2}\).

Simplifying the arbitrary constant C, we can rewrite it as

C = 5sin(4πx)/M(x) at t = 0,

which corresponds to the initial condition

T(x,0) = 5sin(4πx).

Hence, T(x,t) = \(5sin(4\pi x)e^{\lambda^2t/2}\).

d. Applying the boundary conditions T(0,t) = T(3,t) = 0,

we find that sin(λx) should be zero at x = 0 and x = 3.

This gives us λ = nπ/3, where n is an integer.

Substituting this value of λ into the expression for T(x,t), we obtain

T(x,t) = \(5sin(4\pi x)e^{-32\pi^2t}\),

which matches the given solution

T(x,t) = \(5sin(4\pi x)e^{-32\pi^2t}\).

Therefore, the arbitrary constant is determined as λ² = (4π)², which gives us λ = 4π.

Thus, the final solution is T(x,t) = \(5sin(4\pi x)e^{-32\pi^2t}\).

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Answer:

D - Mia is incorrect because machines and engines can never be 100 percent efficient.

Explanation:

someone said this on quizlet i’ll come back to verify once i finish my exam review lol

Answer:

d

Explanation:

edge 2021

Answer:

36 min

Explanation:

i just took a test

Answer:

Perform a simple test of the material in the pan to assess whether it is real gold. Raw gold appears brassy yellow and bright. If you think it is gold, place your hand between it and the sun to create shade over the gold. If it still appears bright in the pan, chances are that it is real gold.

Explanation: