an electromagnetic wave propagates in a vacuum in the x-direction. where does the eu field oscillate?

Answer:

static electricity

Helicopter rescue winch-men must dangle a metal wire below them so that it always touches the ground or water surface first. This discharges static electricity that may have built upon the helicopter.

Static electricity is a familiar electric phenomenon in which charged particles are transferred from one body to another. For example, if two objects are rubbed together, especially if the objects are insulators and the surrounding air is dry, the objects acquire equal and opposite charges.

Static electricity is generated by friction between two insulating materials. When the materials are rubbed together, electrons are removed from atoms within the materials, giving rise to a static electric charge.

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The answer is W = 1.06 MJ.

Now develop and express of Force required:

                                            F = p*V*g

                                            F = 1000*(2*0.5*x*8*dx)*g

                                            F = 78480*x*dx

- Now, the work done is given by:

                                   W = F.s

Where s is the distance from the top of the hose to the differential volume:

                                        s = (5 - x)

We have the work as follows:

                              dW = 78400*x*(5-x)dx

Now integrate the following express from 0 to 3 till the tank is empty:

 W = 78400*(2.5*x^2 - (1/3)*x^3)

 W = 78400*(2.5*3^2 - (1/3)*3^3)

 W = 78400*13.5 = 1058400 J

To find the weight of water, begin by way of finding the density(1 kg/L at 39.2°) and the extent of water. Convert the volume of water to liters after which multiply by way of the density to discover the burden.

Density is useful in calculating the load of materials which can be tough to weigh. you may decide its weight without a doubt with the aid of multiplying the density by using the dimensions, or quantity, of the item.

The unique weight, additionally called the unit weight, is the weight in keeping with the unit quantity of cloth. A typically used value is the precise weight of water in the world at 4 °C (39 °F), which is nine.807 kilonewtons consistent with cubic meters or 62. 43 pounds-force in keeping with cubic foot.

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Answer: I think ions I’m not 100% sure if it’s not let me know

Explanation:

Since the trapeze artis is swinging from a rope that is attached to the ceiling of the forces listed, the force that act upon the trapeze artist are: Tension.

The force that are present are:

A body moving completely back and forth is said to be oscillating. Thus, oscillatory motion is exemplified by circus trapeze.

The weight of the flyer owing to gravity and a centripetal force are the two forces at work on it. The bar on the trapezist's hands creates a centripetal force that the trapeze artist feels as they swing through the air. They are drawn toward the center, or the pivot point, by this force.

Therefore, A trapeze act that swings backward and forth is known as swinging trapeze (or swinging single trapeze). From a static posture, the performer starts to swing, then uses the momentum of the swing to pull off the stunts.

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Answer:

Hello! your answer is C. I did this. got 100%. Have a nice day!

Explanation:

Answer:

D Predicting the volume of a gas by its Temp and preasure

Explanation:

1: not C, took the Plato test and it was wrong

C DOES seem like the answer, but determining if an element is a metal or non-metal deals with the molecular structure of said element as well as the different components meaning its more of a chemistry based task

2: the answer choice D refers to the measurement of volume and temp, these are tied to physical traits and therefore, is a task based on the understanding of physics

*SIDENOTE* a good way to tell in this case is process of elimination, we know that option A involves a more chemical style task, referring to the measurement of the acidity of said substance, same goes for option C for it deals with the molecular structure of a solution

Answer:2 seconds

Explanation:

Potential difference excites the electrons inside the material of the wire used throughout the circuit, due to this excitement the electrons start flowing to the higher potential (positive terminal) & due to their motion, current is directed in the opposite direction to the electron flow.

The process of the blue giant start includes stellar Formation, main Sequence Phase, expansion and Cooling, helium Fusion, variable Behavior, and supernova.

The stage in the formation of a star just before nuclear reactions ignite. After a massive red giant star ejects its outer layers, its hot inner core is exposed, and it becomes a blue giant star.

During the process of a blue giant star,  once a star consumes all its hydrogen, the core superheats and pushes its surface layers far out into space.

The process of the blue giant start includes;

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Answer:

(This will depend on the type of fuel, I will assume that the fuel is petrol)

First, let's find the expected energy consumption in the US for the next 10 years.

We know that in one year, a person consumes 3.5*10^11 joules.

There are 310,000,00 people on the US

Then the total consumption in one year is:

310,000,000*3.5*10^11 joules = 1.085*10^20 J

In 10 years the consumption is 10 times the consumption of a single year, then the expected energy consumption in the US for the next 10 years is:

10*1.085*10^20 J = 1.085*10^21 J

Now let's find the mass of fuel required.

We know that a liter of petrol has 31,536,000 joules of energy,

And a liter of petrol weights 0.75 kg

To find the number of liters of petrol that we need, we need to find the quotient between the expected energy consumption in the next 10 years and the energy of a single liter of petrol, this is:

N = (1.085*10^20 J)/(31,536,000 j) = 3.44*10^13

We will need  3.44*10^13 liters of petrol.

And the total mass of petrol will be:

M = 3.44*10^13*0.75 kg = 2.58*10^13 kg of fuel.

Answer:

2400 J

Explanation:

Latent heat: This is also called hidden heat, it is the heat that is not detectable by the thermometer.

From the question,

Q = cm.................. Equation 1

Where Q = Energy, c = specific latent heat of the liquid, m = mass of the liquid.

Given: c = 4000 J/kg, m = 600 g =( 600/1000) kg = 0.6 kg

Substitute these values into equation 1

Q = 4000×0.6

Q = 2400 J

Hence the energy required is 2400 J

Answer:

Just as images are reflected from the surface of a mirror, light reflected from a smooth water surface also produced a clear image. ... Consequently, the outgoing rays are reflected at many different angles and the image is disrupted. Reflection from such a rough surface is called diffuse reflection and appears matte.

Explanation:

hi po I hope it's help you

Answer: 0.488  m

Explanation: I have my ways ;>

False.In a hash table data structure, the time complexity for finding a value (retrieving an element) is typically O(1) on average, assuming a good hash function and a well-distributed set of keys. This means that the time it takes to find a value is constant, regardless of the size of the data structure.

On the other hand, in a doubly linked list data structure, finding a value requires traversing the list from the beginning or end until the desired value is found. The time complexity for finding a value in a doubly linked list is O(n), where n is the number of elements in the list. This means that the time it takes to find a value in a doubly linked list increases linearly with the size of the list.Therefore, it takes more time to find a value in a doubly linked list data structure compared to a hash table data structure.

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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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The term for the flow of air in a north and south direction, caused by a difference in solar energy between the poles and the equator, is called the "Hadley cell circulation" or simply the "Hadley circulation."

The Hadley circulation is a large-scale atmospheric circulation pattern that occurs in the tropics.

It is driven by the unequal heating of the Earth's surface by the Sun, which creates a temperature gradient between the equator and the poles. Warm air near the equator rises, creating a low-pressure area, and then flows poleward at high altitudes.

As the air moves away from the equator, it cools and sinks back down to the surface near the subtropical regions, creating high-pressure areas. The air then returns to the equator at the surface, completing the circulation loop.

This north-south flow of air in the Hadley circulation helps to distribute heat and moisture from the tropics toward higher latitudes, playing a significant role in shaping global weather patterns. It influences the formation of trade winds, tropical rainforests, and desert regions.

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The velocity of the bullet after it is fired is 313.34m/s.

When a bullet is shot from a gun, it travels forward very quickly. If the gun applies force F to the bullet, the bullet will also apply force F to the gun in the opposite direction.

We know that,

KE = 1/2 mv²

where KE is the kinetic energy of the bullet

m is the mass of the bullet

v is the velocity of the bullet

Given,

KE = 162J

m=0.0033kg

Substituting the value in the formula, we get

162 = 1/2 * 0.0033 * v²

v = 313.34m/s

Thus, the velocity of the bullet after it is fired is 313.34m/s.

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Answer and Explanation:

The half-life of a substance is the time it takes for half of the substance to decay. After one half-life, half of the original substance remains, and after two half-lives, one-quarter of the original substance remains. Therefore, after n half-lives, the fraction of the original substance that remains is (1/2)^n.

In this case, after 25 half-lives, the fraction of the original 800 grams of Chromium-48 that would remain is (1/2)^25, or approximately 0.0000000298. Multiplying this fraction by the original amount of 800 grams gives us the amount that would remain: 0.0000000298 * 800 = 0.0000238 grams.

So, after 25 half-lives, approximately 0.0000238 grams of the original 800 grams of Chromium-48 would remain.

When the ball is at its lowest point, the tension in the string is greater than the ball's weight.

Stretching, stretching behaviour, or the state of being stiffly stretched. muscle tensing: stress perception 1b. : one or both of two counteracting forces that induce or tend to cause extension.

Compression force's opposite is tension. All of the things in the scene that are in contact with one another apply forces to one another. The best demonstration of a tension force is when a rope is being pulled. The rope builds up a lot of tension when a pull force is applied to it.

The pressure inside a vessel, such as the pressure in the blood vessels (blood pressure). For instance, hypertension is the medical term for high blood pressure. Stress, particularly when it manifests as tensed scalp muscles, bottled-up emotions, or anxiety.

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42.72 yards​ . FULL SOLUTION BELOW  IN THE IMAGE  ..

In an American football game, the quarterback receives the ball at the line of scrimmage and runs 10.0 yards backward before running 15.0 yards sideways parallel to a line of scrimmage.

A lines of scrimmage is football is an imaginary line that runs perpendicular to the goal lines & tangent to a nose of the ball when it is placed on the ground. It designates where the ball should be at the beginning of each down.

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Explanation:

Resistance = Resistivity * Length / Area

= 30 * (1/3) / (1/4)

= 40x.

Hence the resistance of the constant wire is 2 * 40 = 80 ohms.

Answer:

elephant

Explanation:

Answer:

elephant

Explanation:

A fuel-filled rocket is at rest. It burns its fuel and expels hot gas. The gas has a momentum of 1,500 kg m/s backward. So, The momentum of the rocket is -1500 kg m/s.

According to the law of conservation of momentum, in a closed system, the total momentum before and after a process remains constant.

A fuel-filled rocket that is initially at rest expels hot gas as it burns its fuel. The gas has a momentum of 1500 kg m/s backward.

We are required to determine the momentum of the rocket.

Consider the fuel-filled rocket as a system.

We have: Momentum before the burn = 0 kg m/s (since the rocket was at rest initially)Momentum after the burn = momentum of the expelled gas

We can therefore say that the initial momentum of the system was zero (0), and after the burn, the total momentum of the system remains the same as the momentum of the expelled gas.

Therefore: Momentum of rocket = - momentum of expelled gas

The negative sign signifies that the rocket's momentum is in the opposite direction of the expelled gas.

Hence, the momentum of the rocket is -1500 kg m/s.

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Earth is larger than Mars. Additionally, Mars' circumference is around half that of the Earth's. Therefore, around 6.5 planets the size of Mars could fit inside the Earth if it were cracked open like an egg.

Not only is Mars smaller than Earth, but it is also less dense. This indicates that the gravitational force of gravity on Mars' surface is just 38% as powerful as that of gravity on Earth.

Therefore, 8.7 × 1016 N of gravitational force pulls the Earth and Mars together. The two planets are 5.5 × 1010 meters apart. The mass of the Earth is 6.0 × 1024 kg.

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The drift mobility of electrons in Cu is the ratio of the electric field to the charge carried by an electron and the time it takes for an electron to reach from one end of a conductor to the other under an applied electric field.

The Hall coefficient is defined as \(RH = (1/ne) * (dVH/dB)\) where n is the charge density, e is the charge of an electron, VH is the Hall voltage, and B is the magnetic field. To calculate the drift mobility of the electrons in Cu, we will first determine the charge density n using the Hall coefficient.

We can then use the conductivity and charge density to calculate the drift mobility. Given, Hall coefficient \(RH = 0.45 × 10^-10 m^3/A s\)  and Conductivity \(σ = 6.5 /ohm\) meter at a temperature of 400K. (Magnetic field)

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Answer:

increases your heart rate

Explanation:

Warming up increases your heart rate and therefore your blood flow which enables more oxygen to reach your muscles.

Answer:

Hcl

Explanation:

Hydrogen and chlorine charge electrons and are non metals while compounds with metals are ionic

Given

mj = 65 kg

mc = 78 kg

voj = 5.75 m/s

after collision

vfj = vfc = 0 m/s

Procedure

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

The velocity before the collision would be 4.8m/s

The force vector on the electron at this instant can be calculated using the Biot-Savart Law and Lorentz Force Law.

The magnitude of the force vector is F = |q|vBsinθ, where F is the force, q is the charge of the electron, v is its speed, B is the magnetic field, and θ is the angle between v and B.


1. Calculate the magnetic field B at the electron's position using the Biot-Savart Law: B = (μ₀I)/(2πr), where μ₀ is the permeability of free space (4π x 10⁻⁷ Tm/A), I is the current (9 A), and r is the distance from the wire (2 x 10⁻³ m).

2. Determine the angle θ between the electron's velocity vector and the magnetic field vector. In this case, θ = 90°, as the velocity vector is perpendicular to the magnetic field vector.

3. Calculate the force magnitude using F = |q|vBsinθ, where q is the elementary charge (-1.6 x 10⁻¹⁹ C), v is the electron's speed (3 x 10⁷ m/s), and sinθ = sin(90°) = 1.

4. Finally, express the force vector in terms of its components.

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Plot B correctly shows the evolution of the universe because it shows a steady/constant incline.

The correct option is B.

Evolution of the universe?

Our universe has been known to begin with an explosion of space itself called the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.

The nature of the universe is such that it underwent several stages of evolution, during its lifetime. These major stages include :

Overall, a steady/constant incline will represent the various steady changes the universe has undergone in its development.

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complete question:

If gravity is the only force that plays a role in the evolution of the universe, and the mass density is less than the critical mass density, which plot correctly shows the evolution of the universe?

Plot A: a curved incline

Plot B: a steady/constant incline

Plot C: a very curved decline

Answer:

A. Increased self-esteem

Explanation:

I hope this helps :)