An electromagnetic wave traveling through a vacuum
has a wavelength of 1.5 × 10–1

meter. What is the

period of this electromagnetic wave?

The magnitude of the net force acting on the boat is approximately 10.957 N, and the direction is approximately 48.34° west of due east. The net force refers to the vector sum of all the forces acting on the boat. It represents the overall force that is responsible for the boat's acceleration and change in motion.

To find the magnitude and direction of the net force acting on the boat, we need to calculate the resultant force by summing up the individual forces in the x and y directions:

Given:

Mass of the boat (m) = 325 kg

Initial velocity (v1) = 2.00 m/s

Final velocity (v2) = 4.00 m/s

Time interval (Δt) = 30 s

Force due to auxiliary engine (F_aux) = 31.0 N

Force due to water resistance (F_res) = 23.0 N

First, we need to calculate the change in velocity (Δv) using the formula:

Δv = v2 - v1

Δv = 4.00 m/s - 2.00 m/s

Δv = 2.00 m/s

Next, we can calculate the acceleration (a) using the formula:

a = Δv / Δt

a = 2.00 m/s / 30 s

a = 0.0667 m/s^2

Now, we can calculate the net force (F_net) acting on the boat using Newton's second law:

F_net = m * a

F_net = 325 kg * 0.0667 m/s^2

F_net = 21.6425 N

To find the direction of the net force, we need to consider the x and y components of the forces:

\(F_x\)= (31.0 N * cos(15°)) + (23.0 N * cos(225°))

\(F_y\)= (31.0 N * sin(15°)) + (23.0 N * sin(225°))

Substituting the values and calculating the x and y components, we get:

\(F_x\) = 31.0 N * cos(15°) + 23.0 N * cos(225°)

\(F_x\)= 29.703 N + (-22.548 N)

\(F_x\) = 7.155 N

\(F_y\) = 31.0 N * sin(15°) + 23.0 N * sin(225°)

\(F_y\) = 8.073 N + (-16.340 N)

\(F_y\)= -8.267 N

Now we can calculate the magnitude and direction of the net force:

Magnitude (|F_net|) =\(\sqrt(F_x^2 + F_y^2)\)

|F_net| = \(\sqrt((7.155 N)^2 + (-8.267 N)^2)\)

|F_net| = \(\sqrt(51.310 N^2 + 68.654 N^2)\)

|F_net| = \(\sqrt(119.964 N^2\))

|F_net| = 10.957 N

Direction (θ) = \(atan\)\((F_y / F_x\))

θ =\(atan\)(-8.267 N / 7.155 N)

θ = \(atan\)(-1.154)

θ = -48.34°

Therefore, the magnitude of the net force acting on the boat is approximately 10.957 N, and the direction is approximately 48.34° west of due east.

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Lighting a candle when the power goes out to provide light, is not an example of energy transferring through electrical current.

Every user of electricity, including lights, heaters, stoves, cell phones, computers, refrigerators, and on and on, will turn electricity into some sort of electromagnetic radiation. With the exception of one, all three examples show how electricity can transmit energy in a typical residential setting. Candles are the non-example since they don't need electricity or electricity to provide light when the power goes out. A candle does generate light and heat energy, but it does so chemically after the wick is lit by the match. The remaining instances all involve harnessing electricity to effect change.

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The above question was incomplete. Check below the full question:

Jamarious wants to transfer energy by electrical current for a class project. He begins observing simple household examples of electrical currents moving energy. Which answer choice is NOT an example of energy transferring through electricity?

A) Lighting a candle when the power goes out to provide light.

B) Using an air conditioner to cool the house down in the summer.

C) The doorbell ringing through the house from the front porch.

D) Pre-heating the oven to bake fresh cookies

The minimum heat capacity is used in max possible heat transfer expression while defining the effectiveness of a heat exchanger because a fluid with a higher heat capacity rate will have a smaller temperature shift than a fluid with a lower heat capacity rate will.

According to the NTU approach, heat exchanger effectiveness is defined as the difference between the actual and maximum heat transfer rates.

The difference between the temperatures of the two entering streams would represent the highest potential temperature increase.

Now, heat capacity rate x temperature differential gives the rate of heat transfer. You should be aware that in this case, a fluid with a higher heat capacity rate will have a smaller temperature shift than a fluid with a lower heat capacity rate will.

The maximum possible heat transfer rate is then determined by multiplying the maximum temperature rise by the minimum heat capacity rate.

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The correct answer is option B

If a bowling ball has a mass of 7. 2 kg and a weight of 70. 6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15. 0 N. The force that the pin exerts on the bowling ball is 15.0 N.

This is because the force of the ball hitting the pin (15.0 N) is equal and opposite to the force of the pin hitting the ball. The mass and weight of the bowling ball are not relevant to this calculation.

The force that the pin exerts on the bowling ball can be determined using Newton's third law of motion, which states that every action has an equal and opposite reaction. Since the bowling ball strikes the pin with a force of 15.0 N, the pin exerts an equal and opposite force on the bowling ball.

Therefore, the force that the pin exerts on the bowling ball is also 15.0 N. The mass and weight of the bowling ball (7.2 kg and 70.6 N, respectively) are not directly related to the force exerted by the pin on the ball.

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Spacecraft have observed and measured them. The assertion provides the greatest justification for our certainty that the particles in Neptune's rings are quite tiny. Here option D is the correct answer.

The rings of Neptune are made up of a variety of particles, including dust, pebbles, and boulders. However, we can be sure that the particles in the rings of Neptune are very small because they have been observed and measured by spacecraft.

During the Voyager 2 flyby of Neptune in 1989, the spacecraft captured detailed images of the rings and collected data on the size, composition, and distribution of the particles. The data showed that the particles in the rings of Neptune range in size from tiny dust particles to larger boulder-sized chunks.

In addition to the Voyager 2 data, more recent observations by the Hubble Space Telescope have provided further evidence that the particles in the rings of Neptune are small. Hubble's observations have revealed clumps and arcs in the rings, which suggest that the particles are small and prone to clumping together due to their mutual gravitational attraction.

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Complete question:

Which of the following statements best explains why we can be sure that the particles in the rings of Neptune are very small?

A) They are made of a low-density material

B) They do not produce significant gravitational effects

C) They are composed of ice and rock fragments

D) They have been observed and measured by spacecraft

The resistance in the original circuit is 72.0 Ω.

We can make use of series circuits and Ohm's Law. The sum of the individual resistances in a series circuit determines the total resistance.

Assume that R is the resistance of the circuit's initial configuration (before the inclusion of the additional resistor).

According to Ohm's Law, the following equation can be used to determine the current (I) in a circuit:

I = V / R

where I is the current, V is the voltage, and R is the resistance.

Given that the current in the original circuit is 24.0 A, we can write the equation as:

24.0 = V / R

Similarly, after adding the 24.0-Ω resistor in series, the current drops to 18.0 A. The equation for this scenario is:

18.0 = V / (R + 24.0)

We can set up a system of equations using these two equations and solve for R.

Equation 1: 24.0 = V / R

Equation 2: 18.0 = V / (R + 24.0)

To eliminate V, we can rearrange Equation 1 to express V in terms of R:

V = 24.0R

Substituting this into Equation 2:

18.0 = (24.0R) / (R + 24.0)

To solve for R, we can cross-multiply and simplify:

18.0(R + 24.0) = 24.0R

18.0R + 432.0 = 24.0R

432.0 = 24.0R - 18.0R

432.0 = 6.0R

R = 432.0 / 6.0

R = 72.0

So, the resistance in the original circuit is 72.0 Ω.

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Answer:

C. Electromagnetic wave

Explanation:

Please give me brainliest

Answer:

C. electromagnetic

Explanation:

because 5g uses higher frequency radio waves a type of electromagnetic radiation which are within the spectrum considered safe.

Answer:

A

Explanation:

potential energy is usually at rest at the highest point in comparason to the ground

Explanation:

Distance = rate × time

1 m = (2.99792×10⁸ m/s) t

t = 3.33565×10⁻⁹ s

Light is the fastest thing in the universe. The speed of light is 2.99792 x 10⁸ m/s . The time that light takes to cover a distance of 1 meter is just 3.39  x 10⁻⁹seconds.

Speed is a physical quantity that means the distance in meter covered by a moving body in one second.  The speed of light is  2.99792 x 10⁸ m/s. Light from sun only takes 8 min to travel to the earth surface.

The speed of a moving particle or wave is mathematically the ratio of distance and time. Thus time of travel can be found out from the distance and speed.

It is given that the distance travelled by light is 1 m and its speed is 2.99792 x 10⁸ m/s. Thus the time taken to  travel is calculated as follows:

Time = distance/speed

         = 1 m/ (2.99792 x 10⁸ m/s)

         = 3.39  x 10⁻⁹s

Therefore, the time that light takes to cover a distance of 1 meter is just 3.39  x 10⁻⁹seconds.

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Answer: Elastic energy is the energy store in a.. compacted spring; an extended elastic band; and a drawn bow.  

Chemical potential energy​​ is position of electrons in specific substance bonds that can be broken (energizes).

:

This stored energy is released and performs work when the elastic material reverts back to its original position. ... In comparison, chemical potential energy, is the energy released during the formation of chemical compounds.

Answer:

Explanation:

I think its

c.d and a.a

im so sorry if i get it wrong

increase 1. Breaking a reactant into small pieces. increase. Increasing the temperature. decrease 3. Diluting solutions. increase 4. Adding heat

Breaking a reactant into small pieces: This will increase the reaction rate as it increases the surface area of the reactant, making it more accessible to the other reactants

Increasing the temperature: This will increase the reaction rate as it provides more thermal energy to the reactants.

Diluting the solutions: This will decrease the reaction rate as it reduces the concentration of reactants.

Adding heat: This will increase the reaction rate as it provides more thermal energy to the reactants.

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The time taken by a factory line to move 8. 5 m along the line is 38.636sec

Speed is different from velocity, It is same when your distance and displacement is equal.

Displacement is equal to shortest path between two points where distance is defined as the total length of path between two points.

Similarly, speed is defined rate of change of distance, whereas velocity is defined as rate of change of displacement.

Since, we have speed by which parts of automobile is moving also, we also have distance to which we need to move parts.

So, we can apply distance-speed formula

We know distance=speed × time

                  =>8.5 = 0.22×t

                   =>t=8.5/0.22

                    =>t=38.636sec.

Hence, total time required to move parts of automobile is 38.636sec.

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The speed of sound in the given string is 2178 m/s.

The speed of sound in a string can be calculated using the equation:

\($v = \sqrt{\frac{T}{\mu}}$\)

Where v is the speed of sound, T is the tension in the string, and μ is the linear mass density.

Substituting the given values into the equation:

\($v = \sqrt{\frac{474\ \mathrm{N}}{0.0001\ \mathrm{kg/m}}}$\)

\($v = \sqrt{4{,}740{,}000\ \mathrm{m^2/s^2}}$\)

v = 2178 m/s (rounded to 3 significant figures)

The speed of sound in a medium depends on the properties of that medium, such as its density, elasticity, and temperature. In a string, the speed of sound is determined by the tension and linear mass density. A higher tension in the string results in a higher speed of sound, while a higher linear mass density leads to a lower speed of sound.

The speed of sound in a string can also be affected by factors such as the thickness and composition of the string. Understanding the speed of sound in a string is important for musicians and sound engineers who work with stringed instruments, such as guitars, violins, and pianos.

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The shape of the wave after 3 seconds will be the same as its initial shape, but it will be displaced to the right by a distance of 3 meters.

Assuming that the wave is a sinusoidal wave, the shape of the wave after 3 seconds can be determined by considering the wavelength and frequency of the wave.

The wavelength is the distance between two consecutive peaks or troughs of the wave, while the frequency is the number of waves that pass a given point in a unit of time. The velocity of the wave is equal to the product of the wavelength and frequency, or v = λf.

If the wave is moving to the right at a constant velocity of 1 m/s, then the wavelength and frequency will remain constant over time. Therefore, the shape of the wave after 3 seconds will be the same as its initial shape, but it will be displaced to the right by a distance of 3 meters.

What is a sinusoidal wave?

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Answer:

2.61 J

Explanation:

Since potential energy U = mgy where m = mass of object, g = acceleration due to gravity = 9.8 m/s² and y = height of object above the ground.

Now for the coffee mug, m= 0.422 kg and it is 0.63 m on a table, so it is 0.63 m above the ground. Thus, y = 0.63 m.

We compute U

U = mgy

= 0.422 kg × 9.8 m/s² × 0.63 m

= 2.605 J

≅ 2.61 J

So, the potential energy of the mug with respect to the floor is 2.61 J

beta β = ₋₁e⁰ particles

₁₉K³⁸ ⇒  ₋₁e⁰ + ₂₀Ca³⁸ (A)

Answer:

384N

Explanation:

Given parameters:

Mass  = 3kg

radius  = 0.5m

Speed  = 8m/s

Unknown:

Centripetal force  = ?

Solution:

The centripetal force is the inward force that keeps a body in motion along a circular path.

It is mathematically expressed as;

      F = \(\frac{mv^{2} }{r}\)  

m is the mass

v is the speed

r is the radius

 Now insert the parameters and solve;

     F  = \(\frac{3 x 8^{2} }{0.5}\)   = 384N

Answer: cause yes they can

Explanation:

How does u know

Answer: 1000 Hz · 0,5 m = 500 m/s

Explanation: speed = frequency · wavelength

Machine weights are safer when used correctly, but free weights can be dropped and cause injury. These are safety considerations to keep in mind whether using free weights or machine weights. But because they aren't big, complicated machinery, free weights are less expensive.

Resistance machines and free weights are very different from one another in terms of how they work and the results they can create.

Machines are set in place and can only move in a few directions, whereas free weights can be moved in whatever direction the user selects. This is the main distinction between machines and free weights. Free weights require you to utilize more stabilizing muscles to control them, whereas resistance machines help you by stabilizing you while you move.

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Answer:

0.4Kg

Explanation:

Marcus pulled the toy with a force of 22.0N and the cat pulled it in the opposite direction with 19.5N

=> F1= 22N

F2= -19.5N

Therefore the net force on the toy= F1+F2

Fnet =22-19.5

Fnet =2.5N

Force= Mass* Acceleration

2.5= (Mass)*6.25

=> Mass=2.5/6.25

=0.4Kg

Therefore the mass of the toy is 0.4Kg

It helps to prevent you from being thrown around in the car during sudden stops or turns, reducing the risk of injury.

As a passenger in a car not wearing a seat belt, during a sharp left turn, you will feel like you are being thrown to the right side of the car due to the inertia of your body. This is because of Newton's First Law of Motion, which states that an object in motion will remain in motion in a straight line at a constant speed unless acted upon by an external force. In the absence of an external force, your body has a natural tendency to continue moving in the same direction and at the same speed as the car before the turn. However, the car's seat, floor, and door exert a force on your body, pushing you towards the left side of the car, which makes you feel as though you are being thrown to the right side of the car. This is why wearing a seat belt is important, as it helps to prevent you from being thrown around in the car during sudden stops or turns, reducing the risk of injury.

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The focal length of the lens is 12 cm, which corresponds to option C.

To find the focal length, we can use the Lensmaker's formula:

(1/f) = (n-1) [(1/R1) - (1/R2)], where f is the focal length, n is the refractive index, R1 is the radius of the first surface, and R2 is the radius of the second surface.

Plugging in the given values:

(1/f) = (1.5 - 1) [(1/2) - (1/3)] (1/f) = 0.5 [(3 - 2) / 6] (1/f) = 0.5 * (1/6) (1/f) = 1/12

Now, we can find the focal length by taking the reciprocal of the above result: f = 12 cm

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The index of refraction for the unknown material is approximately 1.935. This means that light travels about 1.935 times slower in the unknown material compared to its speed in a vacuum.

We can use Snell's law to find the index of refraction for the unknown material. Snell's law states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the indices of refraction of the two materials.

sin(incidence angle)/sin(refraction angle) = n_unknown/n_glass

Plugging in the given values, we get:

sin(33)/sin(25) = n_unknown/1.46

Solving for n_unknown, we get:

n_unknown = sin(33)/sin(25) * 1.46 ≈ 1.935

We can use this index of refraction to determine other properties of the material, such as its composition and density, through further analysis.

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Answer:

I believe its the blue, sorry if I'm wrong

The kinetic energy of the automobile is 900,000 joules.

Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.

The kinetic energy (KE) of an object can be calculated using the formula KE = (1/2)mv^2, where m is the mass of the object and v is its velocity.

Given that the mass of the automobile is 2000 kg and its velocity is 30 m/s, we can substitute these values into the formula:

KE = (1/2)mv^2 = (1/2) x 2000 kg x (30 m/s)^2

= 900,000 J

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The reason for the continued pedaling of the bicycle is to be able to overcome the forces of resistance and friction.

According to the Newton first law, an object would remain at rest or continue in a state of uniform motion unless is acted upon by an external force. The external force is thus the reason for motion.

We know that a bicycle moves along a straight line. If we are to follow what is said by the Newton's law then we would know that the bicycle should just continue to move once it has started moving. There would thus be no need for the bicycle to be pedaled since it s already moving along a straight line.

But we have to consider the fact that there is friction and air resistance that tends to prevent the motion of the bicycle along the straight line and this is why we must have to keep pedaling the bicycle.

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