If the magnetic field in an electromagnetic field is doubled, by what factor does the electric field change

Answer:

Point A

Explanation:

Because it reaches maximum height

Answer:

- increasing the distance between the objects

- decreasing the mass of one of the objects

- decreasing the mass of both objects

Explanation:

Got it right on Edge 2020.

The gravitational force is decreased by increasing the distance between the objects or decreasing mass of one or both of the objects

According to Newton's law of Universal Gravitation;  The force of gravity is directly proportional to the product of the masses between two bodies and inversely proportional to the square of the distance between them.

F = Gm1m2/r^2

Where;

We can see from the formula above, that the following will result in the decrease of the force between two objects;

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Answer:

By friction,by contact,by Electrostatic induction

Explanation:

By friction:This is the process whereby electric charges are produced when two surfaces move over another

By Contact :This is when energy is produced when two bodies come in contact with each other

By electrostatic induction: When a charged object is brought closer to another object (not touched), the original object doesn't lose any charge and the other object gets charged.

hope this helps

Answer:

The pattern of deflection taken by objects not firmly connected to the ground as they travel long distances around Earth

Therefore, the maximum value of the magnetic field 10 m from the isotropic point source of light is 5.30 x 10⁻³ T (tesla).

The maximum value of the magnetic field can be calculated using the relationship between the electric and magnetic fields in an electromagnetic wave, known as the wave impedance (Z). The wave impedance is given by:

Z = E/B

where E is the electric field and B is the magnetic field.

For an isotropic point source of light, the electric and magnetic fields are perpendicular to each other and to the direction of propagation. Therefore, the maximum value of the magnetic field can be calculated using the maximum electric field and the wave impedance of free space, which is approximately 377 ohms.

B = E/Z

B = (2.0 V/m) / 377 ohms

B = 5.30 x 10⁻³ T

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A thermal system overload may occur if a specific electrical or mechanical component is not cooled properly, resulting in overheating or failure of the component.

When a specific electrical or mechanical component in a thermal system is not cooled properly, it can lead to excessive heat buildup. This can cause the component to overheat, leading to decreased performance or even failure.

Overheating can damage sensitive components and disrupt the normal operation of the system. Proper cooling methods such as ventilation, heat sinks, or cooling fans are essential to dissipate the generated heat and prevent thermal system overload. Failure to cool the component adequately can have detrimental effects on the system's functionality and reliability.

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8n downwards

since downwards force is greater than upwards just minus

The increase in length will depend on the specific coefficient of linear expansion (α) for the material of the rod. Once you have the value for α, you can substitute it into the equation to find the exact increase in length.

To calculate the increase in length of the rod when heated from 25°C to 80°C, we need to consider the coefficient of linear expansion for the material the rod is made of.

The coefficient of linear expansion (α) represents how much a material expands or contracts per degree Celsius. It is usually given in units of 1/°C or 1/K (Kelvin). Different materials have different coefficients of linear expansion.

Let's assume the coefficient of linear expansion for the rod material is α.

The increase in length (ΔL) can be calculated using the formula:

ΔL = L₀ * α * ΔT

Where:

ΔL is the increase in length

L₀ is the initial length of the rod

α is the coefficient of linear expansion

ΔT is the change in temperature

Given:

Initial length (L₀) = 2m

Initial temperature (T₀) = 25°C

Final temperature (T) = 80°C

To use this formula, we need to ensure that the temperature is in Kelvin. The conversion from Celsius to Kelvin is done by adding 273.15 to the Celsius temperature.

So, the change in temperature (ΔT) = T - T₀ = (80 + 273.15) - (25 + 273.15)

ΔT = 353.15 - 298.15 = 55

Now we can calculate the increase in length:

ΔL = L₀ * α * ΔT = 2 * α * 55

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the definition of density is: the measure of mass of a material within a given space

The density of an object is the relation that exist between the mass and the space that the object occupies. The general formula of the density is:

ρ = m/v

Where:

For example if we want to know which is the density of a body that has a mass of 100g and a volume of 150 cm³, applying the density formula we get:

ρ = 100 g/150 cm³

ρ = 0.666 g/cm³

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Answer:

From this, we conclude that; Current equals Voltage divided by Resistance (I=V/R), Resistance equals Voltage divided by Current (R=V/I), and Voltage equals Current times Resistance (V=IR). The important factor here is the temperature.

The stall speed of an airplane under a load factor of 2 if the unaccelerated stall speed is 100 knots is 140.(option.c)

The stall speed of an airplane under a load factor of 2 can be calculated by multiplying the unaccelerated stall speed by the square root of the load factor. In this case, the load factor is 2, so we can calculate the stall speed as follows:

Stall speed under load factor of 2 = 100 knots x √2

= 100 knots x 1.414

= 141.4 knots

Therefore, the closest option from the given choices is option C, which is 140 knots. This means that the airplane's stall speed will increase to 140 knots when subjected to a load factor of 2, which is important information for pilots to be aware of to ensure safe flying practices.

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The correct option is B, a goodness-of-fit test with a computed value of chi-square = 1.273 and a critical value = 13.388, the appropriate conclusion would be to fail to reject H0.

Chi-square is a statistical test used to determine the association between two categorical variables. It is commonly used in hypothesis testing to determine whether the observed data deviates significantly from the expected data.

The test works by comparing the observed data with the expected data, which is calculated assuming that there is no association between the two variables being tested. The difference between the observed and expected data is squared, and then divided by the expected data. This process is repeated for all categories in the variables being tested. The sum of these values gives the chi-square statistic. The chi-square statistic is compared to a critical value from a chi-square distribution with degrees of freedom equal to the number of categories minus one.

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Answer:

planets move in elliptical orbit.

Explanation:

this is because planets are formed closer to the sun while the comets are formed further.

The Sun is home to 99.85% of all stuff in the Solar System.All objects in our solar system orbit the Sun.The movement of planets is elliptical in nature.

Our solar system consists of the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, as well as the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

It consists of the planets' satellites, as well as numerous comets, asteroids, and meteoroids, as well as the interplanetary medium. The Sun is home to 99.85% of all stuff in the Solar System.

The movement of planets is elliptical due to the fact that planets are present closer to the sun while the comets are present farther away from the sun as compared to the planets.

Hence the movement of planets is elliptical in nature.

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Recycling helps the environment in a number of ways. Firstly, it reduces the amount of waste that ends up in landfills, which not only takes up valuable space but also creates harmful greenhouse gases.

By recycling materials such as paper, plastic, and glass, we can reduce the need for new resources to be extracted and manufactured, which in turn reduces the amount of energy and emissions associated with these processes. Recycling also helps to conserve natural resources, as materials such as metals and paper can be reused over and over again. Overall, recycling is a crucial step in reducing our impact on the environment and creating a more sustainable future.

we decrease the demand for new resources, preserve natural habitats, and minimize pollution. Additionally, recycling conserves energy as it requires less energy to process recycled materials compared to extracting and processing raw materials. Overall, recycling plays a significant role in maintaining a sustainable and healthy environment.

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Answer:

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.

Explanation:

The answers include the following:

This is referred to as the scattering of light that occurs when it reflects off a surface.

For a rough surface, reflected light rays scatter in all directions which is therefore the reason why it was chosen as the correct choice.

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Answer: A

Explanation: I looked it up on the internet

Answer:

the answer is A

Explanation:

protein helps build and repair tissues

The total time in the air during uniform motion is 10.10 seconds.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

vo = 0 m/s

s = 125 m

a = g = 9.8 m/s²

By using the third equation, we can find the time taken to fall to the ground

s = vo . t + 1/2 . a . t²

125 = 0.t + 1/2 . g . t²

1/2 . 9.8 . t² = 125

t² = 250/9.8

t = 5.05 seconds

The total time should be twice

t total = 2t

t total = 2 . 5.05

t total = 10.10 seconds

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The horizontal distance travelled by the football is 3.1 m.

The angle of projection of the football is calculated as follows;

tan ( θ ) = Vy / Vx

where;

tan ( θ ) = 5 / 3

tan ( θ ) = 1.667

θ = arc tan (1.667)

θ = 59⁰

The resultant velocity of the ball is calculated as follows;

v = √ (Vx² + Vy²)

v = √ (3² + 5²)

v = 5.83 m/s

The horizontal distance travelled by the football is calculated as follows;

x = v² sin(2θ) /g

where;

x = [ (5.83)² sin(2 x 59) /9.8 ]

x = 3.1 m

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Option A. The absolute brightness of a star depends on its size and temperature

The absolute brightness of a star is the amount of light it emits at a standard distance from Earth, regardless of how far away it actually is.

The size and temperature of a star are the primary factors that determine its absolute brightness. The size of the star affects the amount of light it emits, with larger stars emitting more light. The temperature of a star affects the color of the light it emits, with hotter stars emitting bluer light and cooler stars emitting redder light. Both of these factors play a significant role in determining a star's absolute brightness.

Distance and color can also affect a star's brightness, but in different ways. The distance of a star affects its apparent brightness as seen from Earth, but not its absolute brightness. The color of a star can provide information about its temperature and composition, but does not directly determine its absolute brightness.

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The runway should be at least 56.2 meters long.

To find out how long a runway is needed if a light plane must reach a speed of 37 m/s for takeoff and the (constant) acceleration is 3.2 m/s², we can use the formula given below:

s = ut + 1/2 at²

Here,

u = 0 (initial velocity of the plane)

a = 3.2 m/s² (constant acceleration)

t = time taken by the plane to reach 37 m/s.

s = distance required to take off from a runway.

Plugging in the values, we get:

37 = 0 + 1/2 × 3.2 × t²

37 = 1.6 × t²

23.13 = t²

t = √23.13

t ≈ 4.81s

Using the equation:

s = ut + 1/2 at²

We can find the length of the runway required:

s = 0 × 4.81 + 1/2 × 3.2 × (4.81)²

s = 56.2 m (approx)

Hence, the runway should be at least 56.2 meters long.

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Kepler was able to find a relationship between the orbital periods and distances of the planets (his third law) by analyzing a dataset of planetary positions provided by Tycho Brahe. He concluded that all planets moved in elliptical orbits, with the sun at one focus of the ellipse. He also determined that the square of the orbital period of a planet is proportional to the cube of its average distance from the sun, which does not depend on the masses of the planets or the sun.

Johannes Kepler was able to discover a relationship between the orbital periods and distances of the planets that did not depend on the masses of the planets or the sun. This is known as Kepler's Third Law, and it is based on his observations and analysis of the data. Kepler was able to find this relationship by analyzing the observations of the planets' motion that had been made by Tycho Brahe. He discovered that the planets move around the sun in elliptical orbits rather than circular orbits, which was the prevailing theory at the time. Kepler also found that the planets move faster when they are closer to the sun and slower when they are farther away, which he called the Law of Areas. He discovered that the time it takes for a planet to orbit the sun (its period) is related to the distance between the planet and the sun (its semi-major axis) in a specific way. This relationship is expressed as P2 = a3, where P is the planet's period and a is its semi-major axis. This is known as Kepler's Third Law, and it is an important relationship that helps scientists understand the motion of the planets and other celestial bodies.

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Answer:

Approximately \(2.69\; {\rm A}\).

Explanation:

Ensure that all values are measured in standard units. Charge should be measured in coulombs, while time should be measured in seconds:

\(\begin{aligned}t &= 3.0\; {\rm hr} \times \frac{3600\; {\rm s}}{1\; {\rm hr}} = 10800\; {\rm s}\end{aligned}\).

Electric current \(I\) is the rate of flow of electric charge.

In order to find the electric current, divide electric charge \(q\) by the time \(t\) required to transfer these charge. If charge \(q\!\) is measured in coulombs and time \(t\!\) is measured in seconds, the unit of current \(I\)would be amperes:

\(\begin{aligned}I & = \frac{q}{t} \\ &= \frac{29000\; {\rm C}}{10800\; {\rm s}} \approx 2.69\; {\rm A}\end{aligned}\).

Answer:

A. Piccolo

B. The flute would usually have the highest pitch, but because the piccolo is half the size of a flute, it's higher pitched. The piccolo in C has a range from D5 – C8 which is pretty high pitched. This means that the piccolo's range is an octave above that of the flute.

C. The human ear naturally picks out higher notes, so when piccolos play extremely high, we can hear them more easily than the other instruments in a band or orchestra.

D. I'm sorry but I don't know this one.

steadily along a uniform flow tube of cross section area 20cm². The total pressure is 3x104pa and static pressure is 2.5x104 pa. Calculate the velocity of the fluid.

\(\\ \bull\tt\dashrightarrow Work\:Done=Force\times Displacement\)

\(\\ \bull\tt\dashrightarrow Work\:Done=50(10)\)

\(\\ \bull\tt\dashrightarrow Work\:Done=500J\)

Answer:

A form of punctuation that marks the end of a sentence, statement, etc.

Explanation:

. is a period.

It can be used in a sentence, such as this one.

not sure what period you mean, but if you mean in history n stuff: it means a certain era/time something happened. like the "golden age" it's called that because it didn't last forever/ it was just a phase yknow?

Answer:

b) normal

Explanation:

The angle of refraction (transmission) Θt is the angle between the refracted ray and the normal N'. 2. When a light ray hits a surface normally, the angle between the incident ray and the normal is 0, so Θi = 0. Since the angle of reflection equals the angle of incidence, Θr= 0.

The angle of refraction is the angle between the refracted ray and the normal, which is option B.

When light travels from one medium to another medium with a different refractive index, it changes direction.

The angle of refraction is the angle between the refracted ray and the normal, which is an imaginary line perpendicular to the boundary between the two media at the point of incidence. The incident ray is the incoming ray of light that strikes the boundary between the two media.

The medium refers to the substance through which light is passing, and the boundary is the surface separating the two media.

However, the angle of refraction is not related to the incident ray or the boundary, but rather the norm.

Thus, the correct answer would be an option (B) normal.

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Answer:  Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart.

Explanation: not sure is this is your topic

There are 3 states of matter: solid, liquid and gas

Liquids. Conduction occurs better in solids and liquids as the particles are closer to together than in gases as the particles are very further apart.