the electric field of an electromagnetic wave points in the positive y direction. at the same time, the magnetic field of this wave points in the positive z direction. in what direction is the wave traveling?

Charged means that an object has an unequal number of protons and electrons, thus giving it an electrical charge. Neutral means that the object has an equal number of protons and electrons, thus giving it no electrical charge.

When something is "charged," it signifies that electrical energy has accumulated inside it and that it is prepared to be put to use. This can apply to a person who is enthusiastic and full of energy, or it can refer to an electrical component like a battery or capacitor. On the other side, if something is "neutral," it indicates that it is not charged with any electricity or energy and cannot be utilised for any purpose. This may be used to describe an electrical instrument that is devoid of charge or has been discharged as well as a person who is disinterested or indifferent in a certain scenario.

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Answer:

Water takes more energy to heat up

According to the research, solar energy is a renewable energy used in generating electricity and obtaining thermal energy.

It is a type of energy derived from natural sources known as renewable energy that is obtained from solar radiation that reaches the Earth in the form of light, heat or ultraviolet rays.

Solar energy can be used to generate electricity, hot water supply and home heating.

Therefore, we can conclude that according to the research, solar energy is a renewable energy used in generating electricity and obtaining thermal energy.

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Answer:

Momentum (p) is equal to the product of an object's mass (m) and its change in velocity (v).

Change in velocity (v) results in change in momentum (p), which is equal to impulse. Impulse (J) is also equal to an applied force (F) over a period of time (t).

Combining p=mv and J=F t together:

m (v final - v initial) = F t

(2,500 kg) (70 m/s - 30 m/s) = F (10 s)

Explanation:

Solving for F we get:

10,000 N of force

F=ma

F=2500 x 4

F = 10,000 N

Other characteristics that Nima can share with her students are as follows:

Visible light is one of the components of the electromagnetic spectrum (EM). It is the only part of the EM spectrum that is visible to human eyes.

According to this question, Nima has already shared this characteristics of visible light with her student.

Other characteristics that Nima can share with her students are as follows:

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The final velocity of the rock before hitting the ground is 34.42m/s

Velocity of an object can be said as, the rate of change of displacement with respect to time of an object . Its unit is m/s and it is a vector quantity.

V = Δx/Δt

In here , V is velocity ,  Δx is change in displacement and Δt is change in time of an object.

We are given that,

The rock thrown downward with initial velocity = (-u) = -20m/s

The height of the building before and after hitting the ground = -Δy = -40 m

Therefore , to get the value of the final velocity (v) of the rock before hitting the ground , then the equation of motion cab be written as,

v² = u² + 2a(Δy )

Here , (a) is the acceleration due to gravity and taken negative (-9.81m/s²) due downward direction of the building then putting all the values in above equation of motion ,

v² = (-20m/s)² + 2(-9.81m/s²) (-40m)

v² = 1184.42m/s

v = 34.42m/s

Hence, the final velocity of the rock before hitting the ground would be 34.42m/s .

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Explanation:

4.08 seconds thank me later

Using first equation of kinematics

\(\\ \rm\hookrightarrow v=u+at\)

\(\\ \rm\hookrightarrow v=12+(-0.75)(2.5)\)

\(\\ \rm\hookrightarrow v=12-1.9\)

\(\\ \rm\hookrightarrow v=10.9m/s\)

The collision, Miguel is moving in the opposite direction at 1.2 m/s.

Define collision.

A collision in physics is any situation in which two or more bodies quickly exert forces on one another. Despite the fact that the most common usage of the word "collision" refers to situations in which two or more objects clash violently, the scientific usage of the word makes no such assumptions.

Miguel's post-collision velocity can be determined using the law of conservation of momentum.
Momentum is a vector quantity and is equal to mass times velocity (p=mv). Before the collision, the momentum of the system (Miguel + Fernando's car) is equal to (m1=72kg)(v1=4m/s) + (m2=125kg)(v2=0m/s) = 782 kg*m/s.
After the collision, the momentum of the system is equal to (m1=72kg)(v1=?m/s) + (m2=125kg)(v2=2m/s) = 782 kg*m/s.
By solving for v1 we can find that Miguel's post-collision velocity is -1.2 m/s.
This means that after the collision, Miguel is moving in the opposite direction at 1.2 m/s.

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0.840s is the half-life of lithium-8 if the decay constant is 0.825/s. The decay constant is unique to each radioactive substance and measures the speed of radioactive decay. Therefore, the correct answer is option D.

The half-life of lithium-8 can be calculated using the formula:

\(t1/2 = ln(2) / \lambda\)

Where t1/2 is the half-life, ln is the natural logarithm, and λ is the decay constant. Substituting the given decay constant of 0.825/s into the formula:

t1/2 = ln(2) / 0.825/s

t1/2 ≈ 0.840s

Therefore, the half-life of lithium-8 is approximately 0.840s. The formula for half-life is a fundamental concept in nuclear physics, which determines the time required for a radioactive substance to decay by half of its original quantity. The decay constant, which is specific to each radioactive substance, measures the rate at which radioactive decay occurs.

The higher the decay constant, the shorter the half-life, indicating that the substance is more unstable and decays faster. In this case, the decay constant of lithium-8 is 0.825/s, indicating that it is relatively unstable and has a short half-life of approximately 0.840s.

In summary, the half-life of lithium-8 is approximately 0.840s with a decay constant of 0.825/s. Therefore, the correct answer is option D.

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Answer:

The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.

Answer:

Electromagnetic field, a property of space caused by the motion of an electric charge. A stationary charge will produce only an electric field in the surrounding space. If the charge is moving, a magnetic field is also produced. An electric field can be produced also by a changing magnetic field.

Answer:

friction doesn't let the desk move.

Explanation:

the law of motion states any object in motion should stay in motion.

Induced current through the resistor R is -BvA/R.

In the given figure, two solenoids are approaching each other with a velocity v.

The induced current through the resistor R can be determined by the application of Faraday's law of electromagnetic induction.

What is Faraday's law of electromagnetic induction?

Faraday's law of electromagnetic induction is a principle that describes how the electromotive force (EMF) and electric current are produced by a change in the magnetic field.

The formula for calculating the EMF is E = -dΦ/dt, where E is the EMF, Φ is the magnetic flux, and t is the time. It can be used to determine the EMF produced by a solenoid, which is proportional to the rate of change of the magnetic flux through the solenoid.

In this question, the induced current can be calculated as:

Induced EMF (E) = Rate of change of magnetic flux (dΦ/dt). Since the solenoids are approaching each other with a velocity v, the magnetic flux through the resistor R will change. The magnetic flux through the resistor R is given by:Φ = B x A, where B is the magnetic field strength and A is the area of the resistor. Since the solenoids are approaching each other, the magnetic field between them will increase, which will result in an increase in the magnetic flux through the resistor R.

Therefore, the induced EMF through the resistor R will be: E = -dΦ/dt = -d(B x A)/dt = -B x dA/dt, Since the solenoids are approaching each other, the area of the resistor R that is exposed to the magnetic field will increase.

Therefore, dA/dt will be positive, and the induced EMF will be negative (since the rate of change of the magnetic flux is negative).Thus, the induced current through the resistor R will be: I = E/R = (-B x dA/dt)/R = -BvA/R (Ans)Therefore, the induced current through the resistor R is -BvA/R.

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Answer:

Forces Acting in Opposite Directions

In general, whenever forces act on an object in opposite directions—like the book on the table—the net force is equal to the difference between the two forces. In other words, one force is subtracted from the other to calculate the net force.

Hope I helped!!!

Answer:

weight will decrease

Explanation:

this is because mad stays the same no matter what so it was between this and weight increases

Answer:

Its weight will decrease.

Explanation:

just because

Answer:

what are you trying to do for this question

Explanation:

Answer:

Renewable energy sources can come again, but nonrenewable is gone forever. For example, coal and gasoline are both nonrenewable.

Explanation:

True. It is currently believed that superclusters, which are large groupings of galaxies, lie on the surfaces of "bubbles" in space. These bubbles, also known as voids, are vast regions of space that contain very few galaxies or other cosmic structures. The distribution of these voids and superclusters creates a cosmic web-like structure, with filaments of galaxies connecting the superclusters and surrounding the voids. This web-like structure is thought to have formed due to the gravitational attraction of matter, with the denser regions of matter attracting more matter and forming the superclusters. The voids then formed in the regions where matter was less dense. This understanding of the distribution of matter in the universe has been supported by observations from telescopes such as the Sloan Digital Sky Survey, which has mapped the positions of millions of galaxies. The study of the large-scale structure of the universe is an important area of research in cosmology, helping us to better understand the origins and evolution of our universe.

Answer:

Option D. ⁸⁵₃₆Kr

Explanation:

⁸⁵₃₅Br —> ⁰₋₁e + ?

Let ⁿₘZ represent the unknown.

Thus, the equation becomes:

⁸⁵₃₅Br —> ⁰₋₁e + ⁿₘZ

Next, we shall determine n, m and Z as follow:

85 = 0 + n

85 = n

Thus,

n = 85

35 = –1 + m

Collect like terms

35 + 1 = m

36 = m

Thus,

m = 36

ⁿₘZ => ⁸⁵₃₆Z = > ⁸⁵₃₆Kr

Thus, the equation:

⁸⁵₃₅Br —> ⁰₋₁e + ⁿₘZ

Becomes:

⁸⁵₃₅Br —> ⁰₋₁e + ⁸⁵₃₆Kr

Answer:

B= 4 A=5

Explanation:

The speed of light in a medium, such as plastic, is given by the equation v = c/n, where v is the speed of light in the medium, c is the speed of light in vacuum (approximately 3 x 10^8 m/s), and n is the refractive index of the medium. To determine the speed of red light in plastic, the refractive index of the specific plastic material must be known.

The wavelength of light in a medium can be determined using the equation λ = λ0/n, where λ is the wavelength of light in the medium, λ0 is the wavelength of light in vacuum, and n is the refractive index of the medium. Given that the red laser has a wavelength of 633 nm (633 x 10^-9 m) in vacuum, the wavelength of red light in plastic can be calculated using the refractive index of the plastic material.

In conclusion, to determine the speed and wavelength of red light in plastic, the specific refractive index of the plastic material needs to be known.

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The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

The minimum length of the runway required to accommodate the airplane for takeoff is 960 feet. We can use the kinematic equations to solve for the distance required by the airplane to attain the required speed.

The kinematic equation we will use for the analysis is:\(v^2 = u^2\) + 2 as where v = final velocity u = initial velocity s = distance covered a = acceleration of the airplane When the airplane is at rest, it has an initial velocity (u) of 0 feet per second.

At the point of takeoff, the airplane attains a final velocity (v) of 480 feet per second. The maximal acceleration (a) of the airplane is given as 12 feet per square second. We will use this information to determine the minimum distance (s) the airplane will need to attain the required speed. We begin by substituting the known values into the kinematic equation as follows:\(v^2 = u^2\) + 2as

Since the airplane is initially at rest, u = 0 feet per second. Thus, the equation reduces to:v^2 = 2asWe substitute the known values of v = 480 feet per second and a = 12 feet per square second and solve for s as follows: 480 = 2(12) s 23,040 = 24s 960 = s .The minimum distance the airplane needs to travel to attain a speed of 480 feet per second is 960 feet.  

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Answer:

b

Explanation:

because it shows you it

The pressure exerted on an object under 0.76 meters of mercury is 101,292.8 Pascals

Pressure is defined as force exerted per unit area.

P = F/A

Where:

F = force

A = area

In this case the force is the gravitational force or weight.

w = mg

where m = mass of the substance

Since mass is equal to density times volume:

m = ρ . V

Hence,

P = mgh/A = ρgh

Where:

ρ = density of the substance.

The parameters in the problem are:

ρ = density of mercury = 13,600 kg/m³

h = 0.76 meters

g = 9.8 m/s²

The pressure is:

P = 13,600 x 9.8 x 0.76

  = 101,292.8 Pascals

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I'm sorry, but as Johnny Sins, I don't have the ability to create visual diagrams such as bar graphs. However, I can describe the concept of kinetic and potential energy and how it relates to a ball falling to the ground.

Kinetic energy is the energy an object has due to its motion. As the ball falls towards the ground, it gains kinetic energy. At Point A, the ball is just starting to fall, so its kinetic energy is low. As it falls further, its kinetic energy increases. At Point B, its kinetic energy is at its maximum. At Point C, the ball reaches its terminal velocity and its kinetic energy levels off.

Potential energy is the energy an object has due to its position relative to some reference point. At Point A, the ball has the maximum potential energy due to its height above the ground. As the ball falls, its potential energy decreases. At Point B, its potential energy is at its minimum. At Point C, the ball reaches its terminal velocity and its potential energy levels off.

As the ball falls from Point A to Point B, its potential energy is transformed into kinetic energy, and as it reaches Point B, its kinetic energy is at its maximum and its potential energy is at its minimum. From Point B to Point C, its kinetic energy levels off, and from Point C to Point D, its kinetic energy decreases as it loses speed and its potential energy increases as it approaches the ground.

Answer:
1.)the surface of the table is set into vibration
2.)the initial vibration was larger
3.)The entire table vibrates

Explanation:hope this helps :3 have a good day xlXCherryColaXlx..(pls mark me brainliest)

Answer:

v = 40 m/s

Explanation:

Given that,

A man stands 80m in front of a cliff face.  He makes aloud bang and listens for the  echo. He makes a loud bong once every second.

He hears an echo exactly half way between  the bang that caused it and the next hang.

Distance = 40 m, t = 1 s

The speed of sound is given by :

\(v=\dfrac{d}{t}\\\\v=\dfrac{40\ m}{1\ s}\\\\v=40\ m/s\)

Hence, the speed of sound is equal to 40 m/s.

The terms MSwithin and MSbetween are often used in the context of statistical analysis, particularly in the field of experimental design. MSwithin refers to the variability or variation within a group or sample, while MSbetween refers to the variability or variation between groups or samples.

To give a more detailed explanation, MSwithin is the mean square within groups, which represents the average amount of variation or dispersion within each group or sample. This measure is calculated by dividing the sum of squared deviations within each group by the degrees of freedom for within-group variation. MSwithin is used to estimate the variance of the population from which the samples were drawn.

On the other hand, MSbetween is the mean square between groups, which represents the average amount of variation or dispersion between the groups or samples. This measure is calculated by dividing the sum of squared deviations between each group mean and the overall mean by the degrees of freedom for between-group variation. MSbetween is used to estimate the variance between populations or groups.

In summary, MSwithin and MSbetween are two measures of variation used in statistical analysis to compare differences or similarities between groups or samples. The difference between the two measures can help researchers determine whether the observed differences between groups are significant or simply due to chance.

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