The electric field at the surface points radially outward and has a magnitude of 8300 n/c. if r1 = 0.5 m, r2 = 1.9 m, and a = 3, find the value of the charge q, in coulombs?

Answer: The car slows down by 10 meters per second every second.

Explanation:

AnswerThe speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. What was the car's acceleration ?

We have the following data:

V (final velocity) = 10 m/s

Vo (initial velocity) = 30 m/s

ΔV  (speed interval)  = V - Vo → ΔV  = 10 - 30 → ΔV  = - 20 m/s

ΔT (time interval) = 4.0 seconds

a (average acceleration) = ? (in m/s²)

Explanation:

Answer:

55 km

pls give brainliest hope it help

Explanation:

A star is 230 light years away. the light we see tonight from that star left it

Instead of time, a light-year counts distance (as the name might imply). One light-year, or roughly 6 trillion miles, is the distance a light beam travels in one year on Earth (9.7 trillion kilometers).

Since light takes around 230 years to travel the distance from the star to us, the light we see tonight departed that star 230 years ago.

Because of this, astronomers frequently discuss the "lookback time" when seeing far-off celestial objects. The older the light we witness from an object, the further away it is, and the further back in time we can see.

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Answer:

Question: Find out more about either one of these forms of energy

Answer:

Solar energy: This is energy generated from the sunlight, and it can be converted to other energy that can be useful. Solar energy from the sun considered a clean source of electricity can be converted to a usable electricity source or stores the light in batteries for thermal use. This energy conversion is possible through the use of solar panels attached to where the conversion would take place so as to capture the light from the sun.

Question: What is being done to make it a more efficient source of energy

Answer:

1. When using solar energy to power homes, it is more efficient to have panels on a green roof because of the characteristics of this roof not to reflect or lose more light from the sun.

2. Improvements on the type of solar cell to use for instance that are cheaper and could maximize the energy from the sun are all ways that make it more efficient.

3. Since solar panels don't produce energy at night, usage of batteries that could store electricity during the day or when the sun is not obscured would make solar more efficient.

Question: where it is being used in the United States?

Answer:

1. California

2. Nevada

3. New York

4. Texas

The total length of the spring will be 13.098m when we store 10.0J of potential energy in this spring which is 13cm long initially.

Given the length of ideal spring (L) = 13cm

The mass of weight (m) = 3.15kg

The length of spring after extension (L') = 14.5cmThe extension in spring = x =L' - L = 14.5 - 13 = 1.5cm

The potential energy in the spring (PE) = 10J

Let the force required to stretch the string = F

We know that from Hooke's law F = kx where k is the spring constant.

Then m*g = k * x

\(3.15 * 9.8 = k * 1.5 * 10^{-2\)

k = 2058N/m

The potential energy of the spring is calculated as (U) = 1/2kx'^2 then:

\(10 = 1/2 * 2058 * (x')^2\)

\((x')^2 = 10 * 2/2058\)

x' = 0.098m

So the new length of the spring will be = L + x' or L - x'

The new lengths of springs are 13 + 0.098 = 13.098m or 13 - 0.098 = 12.902m

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The acceleration of a particle is a= (-1.6 v1/2) m/s². The initial velocity of the particle is u = 8 m/s.

Now, let's use the formula: 2as = v² - u², where a = (-1.6v^(1/2)) m/s², u = 8 m/s, and v = 0 m/s 2 × (-1.6v^(1/2)) × s = 0 - 8²s = 64 / (2 × 1.6v^(1/2)) = 20v^(1/2)/4 = 5v^(1/2) meters.

This is the distance travelled by the particle before it stops.

We know that the final velocity of the particle is 0 m/s. The initial velocity of the particle is 8 m/s.

The acceleration of the particle is a = (-1.6v^(1/2)) m/s².

Let's use the formula to calculate the time it takes to stop the particle. It is:v = u + at 0 = 8 + (-1.6v^(1/2)) × t t = 8 / (1.6v^(1/2)) t = 5 / v^(1/2) seconds.

This is the time taken by the particle to come to rest.

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The particle travels approximately 12.5 meters before it comes to a stop. It takes approximately 5 seconds for the particle to reach zero velocity.

To determine the distance traveled before the particle comes to a stop, we need to integrate the velocity function over time. The given deceleration is expressed as a = -1.6√v , where v is the velocity in m/s. Since the initial velocity is 8 m/s, we can write the deceleration as a = -1.6√8. Integrating the acceleration with respect to velocity gives us the equation: ∫dv/(-1.6√v ) = ∫dt. Simplifying the integral and solving for t gives us t = 5 seconds.

To find the distance traveled, we integrate the velocity function with respect to time. The velocity function is given by dv/dt = -1.6√v. Separating variables and integrating, we get ∫dv/√v  = ∫-1.6dt. Evaluating the integral and substituting the limits (from v = 8 m/s to v = 0), we find √v = -1.6t + C. Applying the initial condition v(0) = 8, we can solve for C and obtain C = √8. Plugging in the values for t and C, we get √v = -1.6t + √8. Squaring both sides and solving for v, we find v = \((1.6t - \sqrt{8} )^{2}\). Integrating the velocity function again with respect to time, we get ∫\((1.6t - \sqrt{8} )^{2}\) dt = ∫ds. Evaluating the integral and substituting the limits, we find s = 12.5 meters.

Therefore, the particle travels approximately 12.5 meters before coming to a stop.

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Answer: The thickness of the vertical flow lines indicates the relative quantity.

The thickness of the vertical flow lines indicates the relative quantity.

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Answer:

To actually do it what are you referring to comment below I'll assist further

If the radio waves transmitted by a radio station have a frequency of 79.5 MHz, the wavelength of the waves, in meters is 3.77m.

Given: Velocity of light,  c = 3.00 x 10⁸ m/s  m/s

Frequency, f = 7.95 x 10⁷/s

For wavelength, the required formula is

\(λ = c/ f \\λ = 3 * 10 ^{8} / 7.95 * 10^{7} \\λ = 3.77\)

Hence, the required wavelength is 3.77 meters.

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Answer:

it is called Group of heterogeneous mixture

Explanation:

Because heterogeneous means uneven or with different compositions

So not evenly mixed will be heterogeneous mixture

Answer:

c

Explanation:

because thats it

Force, Friction (static and kinetic), (balanced and unbalanced).

Materials - Tape, spring scales, measuring tape, string, wooden blocks, wooden blocks with sandpaper on the bottom, and different surfaces.

Procedure - 1. To test and gather information on surface friction, each group will look at four distinct surfaces (a concrete floor, a lab desk, a lab floor, and a carpet).

2. Each item should have a string firmly tied around it (a plain block of wood and the wood with sandpaper). Connect the string's looped end to the spring scale.

3. The 50 cm measuring line should be fastened to your surface. Your beginning point will be in the front, and your finishing point will be at the back.

4. Pull the unadorned wood block across the designated surface at a SLOW, STEADY SPEED for 50 cm. Note the amount of force (in N) necessary to pull the object.

5. Pull the wood block with the sandpaper on it across the designated surface at a SLOW, STEADY SPEED for 50 cm. Note the amount of force (in N) necessary to pull the object.

6. Step 5 must be repeated twice more. Put your findings in a table and on the class data spreadsheet.

REPEAT STEPS 1-6 FOR EACH SURFACE!

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From a thermodynamic perspective, the thermodynamically irreversible process description among the following options is: Heat transfer between two objects with the same temperature.

In thermodynamics, an irreversible process is characterized by the inability to return the system and its surroundings to their initial state without external intervention. It is associated with an increase in entropy and the dissipation of energy. In the case of heat transfer between two objects with the same temperature, there is no temperature difference to drive the transfer of heat. Consequently, no useful work can be extracted from this process, and it does not generate any change or increase in entropy. As a result, this process is considered thermodynamically reversible since it can be easily reversed without any net change in the system or surroundings.

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To find the tangential speed required for the bob to move in a horizontal circle with the string making an angle of 21.0 degrees with the vertical, we can use the concept of centripetal force.

The centripetal force required to keep the bob moving in a circular path is provided by the tension in the string. The tension can be resolved into two components: the vertical component and the horizontal component. The vertical component of the tension balances the weight of the bob, which is given by: T * cos(21.0°) = mg. where T is the tension in the string, m is the mass of the bob, and g is the acceleration due to gravity. The horizontal component of the tension provides the centripetal force required for circular motion, and it can be expressed as: T * sin(21.0°) = mv^2 / r. where v is the tangential speed of the bob and r is the radius of the circular path. Dividing the two equations: [T * sin(21.0°)] / [T * cos(21.0°)] = (mv^2 / r) / (mg). tan(21.0°) = v^2 / (rg). Solving for v: v = √(rg * tan(21.0°)) Now, we can substitute the values of the gravitational acceleration (g) and the angle (21.0°) to calculate v. Note: It is assumed that the bob is moving in a horizontal circle without any additional external forces affecting the system.

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As the raindrops do not provide a continuous path to flow the electrons because the air between the rain droplets acts as an insulator, therefore, the person walking under an electric transmission line would not be electrocuted.

In physics, a conductor can be described as a type of material that allows the flow of charge in one or more directions. Electric current is produced by the flow of negatively charged electrons or ions in some cases.

Raindroplets have dissolved impurities which make them somewhat conductive of electricity, but conductors should be continuous to create a conducting path at normal voltages.

The electric current can only flow when there is a continuous path of conductive material providing a conductor for electrons to travel through. The continuous flow of electrons needs to be an unbroken path to allow it to flow.

Since the air can be considered an insulating material and an air gap separates prevents a continuous path has been broken therefore electrons cannot flow.

Therefore, due to the absence of the closed circuit, you would not be electrocuted during a rainstorm if you walked under an electric transmission line.

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The angular velocity of the assembly at t = 5s is 1250 rad/s

To solve this problem, we need to use the principle of conservation of angular momentum. We can assume that the assembly starts from rest and then find the angular velocity at t = 5s.

The moment of inertia of the assembly can be calculated as the sum of the moments of inertia of the individual components.

In this case, we have two rods, AB and BC, each with a mass of 9kg. The moment of inertia of a rod about its center of mass is (1/12)xmxL\(^2\), where m is the mass and L is the length of the rod.

Since each rod has a length of 1m, the moment of inertia of each rod is rod is (1/12)9(1\(^2\)) = 0.75 kgxm\(^2\).

The moment of inertia of the assembly is then the sum of the moments of inertia of the two rods: I = 2x(0.75) = 1.5 kgxm\(^2\).

The torque acting on the assembly is given by M = 15t\(^2\) Nxm.

We can now use the equation for angular acceleration: α = τ/I, where α is the angular acceleration, τ is the torque, and I is the moment of inertia.

At t = 5s, the torque is M = 15x(5\(^2\)) = 375 Nxm.

Thus, the angular acceleration is α = 375/1.5 = 250 rad/s\(^2\).

Starting from rest, the initial angular velocity is ω = 0.

The final angular velocity can be calculated using the equation ω = ω0 + αxt, where ω0 is the initial angular velocity, α is the angular acceleration, and t is the time.

Substituting the values, we get:

ω = 0 + 250x5 = 1250 rad/s

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Answer:

1. Static friction = not moving

2.  sliding friction = moving

3. rolling friction = wheels

4. bumpy the surfaces are

5. how heavy the object is

6. it is easier to keep an object moving

7. static friction is GREATER than sliding friction

Explanation:

Newton's law of cooling states that the rate of temperature change of a body is proportional to the difference between its temperature and the ambient temperature. Using Euler's method, an M-file function called Bodycooling can be created to solve this problem and compute the temperature and its derivative over a given time period. The results can be plotted in MATLAB to visualize the temperature variation over time.

a) The equation can be written in finite divided differences suitable for Euler's method as:

(T_i+1 - T_i) / Δt = -k(T_i - T_ambient)

b) Here is an example of the Bodycooling.m function in MATLAB:

```MATLAB

function [time, temperature, derivative] = Bodycooling(ambientTemp, k, timesteps, initialTemp, totalTime)

   time = linspace(0, totalTime, timesteps + 1);

   temperature = zeros(1, timesteps + 1);

   derivative = zeros(1, timesteps + 1);

   temperature(1) = initialTemp;

   for i = 1:timesteps

       derivative(i) = -k * (temperature(i) - ambientTemp);

       temperature(i+1) = temperature(i) + derivative(i) * (time(i+1) - time(i));

   end

end

```

c) To compute the temperature and temperature derivative from t = 0 to 20 min with a step size of 2 min, using ambient temperature Ta = 20 °C and k = 0.019 min^(-1), you can call the Bodycooling function as follows:

```MATLAB

ambientTemp = 20;

k = 0.019;

timesteps = 10; % (20 min / 2 min)

initialTemp = 70;

totalTime = 20;

[time, temperature, derivative] = Bodycooling(ambientTemp, k, timesteps, initialTemp, totalTime);

```

d) To plot the temperature as a function of time, you can use the following MATLAB code:

```MATLAB

plot(time, temperature);

xlabel('Time (min)');

ylabel('Temperature (°C)');

title('Temperature of the Body over Time');

grid on;

```

Executing this code will display a plot showing the temperature of the body as a function of time.

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Answer:

The big rip theory

Explanation:

      I believe what you are referring to is the big rip theory, in which the universe expands faster than the speed of light Kurzgesagt refers to it as a "horizon" but in reality it's a little more complicated than that. Eventually the expansion of the universe will accelerate far beyond the speed of light creating space between molecules until eventually all matter is fleeting and the entire universe is an endlessly vast cosmic void with not but the occasion molecule left from a time when things weren't so lonely.

Answer:

here again

Explanation:

here my answer

Answer:

0.4m/s

Explanation:

\(F = ma\) where F= force, m= mass, and a=acceleration

we also know that,

a = Δv / t where Δv = change in velocity and t = time

thus F = m ( Δv / t)

\(2000=50(\frac{v}{0.01})\)

\(\frac{2000}{5000} = v\)

0.4m/s = Δv

The maximum tension that a string can withstand is given as 92.0 N. We want to find out what the maximum acceleration that the elevator can have before the upper string breaks. Therefore, we cannot find the acceleration without knowing the mass of the elevator.

To find the maximum acceleration, we need to consider the forces acting on the elevator. There are two forces: the force due to gravity (weight) and the tension in the string (upward force).Since the elevator is moving upwards, the acceleration will be in the same direction as the tension force.

Therefore, we can set up an equation that relates the tension and the acceleration:

\(F_{net}\) = T - mg where\(F_{net}\) is the net force (which is equal to ma), T is the tension in the string, m is the mass of the elevator, and g is the acceleration due to gravity.

Substituting \(F_{net}\) and T in the equation and solving for a, we get: a = (T - mg) / m .

The tension in the string is given as 92.0 N, and the mass of the elevator is not given. Therefore, we cannot find the acceleration without knowing the mass of the elevator.

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Answer:

True

Explanation:

Nasa’s Orion spacecraft, which left earth last week, flew within 81 miles of the surface of the moon.

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Answer:

According to NASA, time travel is possible, just not in the way you might expect. Albert Einstein's theory of relativity says time and motion are relative to each other, and nothing can go faster than the speed of light, which is 186,000 miles per second. Time travel happens through what's called “time dilation.

Explanation:

brainiest

The RMS value of the magnetic field (B) will also be doubled when the RMS value of the electric field (E) is doubled. The factor by which the magnetic field changes is 2.

To provide a detailed explanation, when the RMS value of the electric field in an electromagnetic wave is doubled, the RMS value of the magnetic field also changes. The relationship between the electric and magnetic fields in an electromagnetic wave is governed by Maxwell's equations. These equations state that the electric and magnetic fields are perpendicular to each other and vary in intensity in a synchronized way.

In an electromagnetic wave, the intensity of the electric field and the magnetic field are related by a constant known as the impedance of free space. This constant determines the strength of the magnetic field for a given strength of the electric field. Therefore, if the RMS value of the electric field is doubled, the RMS value of the magnetic field will also double. This means that the strength of both fields increases proportionally.

To solve this mathematically, we first need to understand the relationship between the electric field (E) and the magnetic field (B) in an electromagnetic wave. This relationship is given by the formula:

E = c * B

where E is the RMS value of the electric field, B is the RMS value of the magnetic field, and c is the speed of light in a vacuum.

Now, if the RMS value of the electric field (E) is doubled, we have:
2E = c * B'

where B' is the new RMS value of the magnetic field. We can now express B' in terms of the original magnetic field B:
2E = c * B'
2(c * B) = c * B'
2B = B'

Hence, the RMS value of the magnetic field (B) will also be doubled when the RMS value of the electric field (E) is doubled. The factor by which the magnetic field changes is 2.

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To solve this problem, we need to use conservation of energy. The spring has elastic potential energy due to being stretched, which will be transferred into kinetic energy as the glider moves.

At the release point, all of the potential energy will be converted into kinetic energy, so we can use the equation \(KE = 0.5mv^2 to solve for v.\)

We can also use the force required to hold the spring at 0.350 m to calculate the spring constant, k, using Hooke's Law (F = -kx).

Once we have k, we can calculate the maximum displacement of the glider (x = -0.100 m)

Use conservation of energy to solve for v. The correct answer is C) 2.87 m/s.

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Answer:

plants because of photosynthesis humans because of food and the energy causing cells in it and batteries or solar panels because of the sun.

Explanation:

\( 3.35 \times 10 ^{ - 11} \)

Explanation:

\(m1= 5 kg \\ \\ m2 = 10 kg\)

\(distance \: \: between \: \: objects = 10 cm \\ \\ force \: \: of \: \: attraction = ? \\ \\ F= g m1 \times \frac{m2}{ {d}^{2} } \\ \\ =6.7 \times {10}^{ - 11} \times 5 \times \frac{10}{ {10}^{2} } \\ \\ = 67 \times {10}^{ - 11} \times 5 \times \frac{10}{100 \times 10} \\ \\ = 67 \times \frac{ {10}^{ - 11} }{20} \\ \\ =6.7 \times \frac{ {10}^{ - 11} }{2} \\ \\ = 3.35 \times 1 {0}^{ - 11} \)