_________________is a electromechanical device that performs
the same function as a fuse and in addition acts as a switch.
_______________is a device that changes or transforms
alternating current (AC

The tension in the string of a ball moving in a circular path is given by the equation:

Tension = (mass * velocity^2) / radius

F_c = (m * v^2) / r

12 N = (m * v^2) / r

v' = (2 * π * r) / (0.5 s)

v' = 4 * π * r

In this case, the mass of the ball and the radius of the circle remain constant. We can assume that the mass is canceled out when comparing the tensions.

Given that the ball completes a full circle in 1 second, the velocity is v = 2πr / t, where t is the time taken to complete the circle and r is the radius of the circle.

For the first case (1 second), we have v₁ = 2πr / 1.

For the second case (0.5 seconds), we have v₂ = 2πr / 0.5.

Since the radius is the same for both cases, we can compare the tensions using the ratio of velocities squared:

T₂ / T₁ = (v₂^2) / (v₁^2) = (2πr / 0.5)^2 / (2πr / 1)^2 = (4) / (1) = 4.

Therefore, the tension in the string when the ball completes the circle in half a second is 4 times the tension when it completes the circle in one second.

Given that the initial tension is 12, the tension for the half-second case is:

T₂ = T₁ * 4 = 12 * 4 = 48.

Therefore, the correct answer is (D) 48.

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Answer:

3 is right i guss look : 100N-20N=80N

The rate of change of power with respect to resistance is -25/\(R^2\) watts per ohm (W/Ω).

The power P dissipated by a 5-volt battery across a resistance of R ohms is given by the formula P = (25/R). To find the rate of change of power with respect to resistance, we need to differentiate the power equation with respect to R. Using the power rule for differentiation, we have:

dP/dR = -(25/\(R^2\))

The negative sign indicates that as the resistance increases, the power dissipation decreases, which is consistent with Ohm's law. Therefore, the rate of change of power with respect to resistance is -25/\(R^2\) watts per ohm (W/Ω). This means that for every unit increase in resistance, the power dissipation will change at a rate inversely proportional to the square of the resistance.

This relationship demonstrates the diminishing power dissipation as the resistance increases, highlighting the importance of considering resistance in electronic circuits and systems.

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Answer:

A wave in which the medium vibrates at right angles to the direction of the propagation is called transverse wave.

Resistance is a property of a device while resistivity is a property of a material. Resistance refers to how well a device or material opposes electric current, whereas resistivity refers to the inherent capability of a material to resist the flow of electric current.

Here are the meanings of the other terms in the options:Ammeter: An ammeter is an instrument that measures the electric current in a circuit.Voltmeter: A voltmeter is a measuring instrument that measures the potential difference between two points.

Conductor. A conductor is a material that conducts electricity well.Insulator: An insulator is a material that does not conduct electricity well.

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Answer:

The main application for fusion is in making electricity. Most fusion reactors make less radiation than the natural background radiation we live with in our daily lives. ... Clean - No combustion occurs in nuclear power (fission or fusion), so there is no air pollution.

Light is radiant energy in the form of a wave of electromagnetic energy.

Light is a form of electromagnetic radiation that is visible to the human eye. It is made up of a stream of energy particles, called photons, that travel in a wave-like pattern. It has various properties, including intensity, color, and direction, which can be used to explain its behavior. It can be described as having both a particle-like nature and a wave-like nature. The particle-like nature of light is exhibited in the way it travels in packets of energy, known as photons. The wave-like nature of light is demonstrated by the way it can be bent, diffracted, and refracted.
The intensity of light is determined by the amount of energy that a photon has. The color of light is determined by the wavelength of the light, with different colors having different wavelengths. Direction is also an important property of light, as it determines how light will be bent when it passes through an obstacle or is reflected off of a surface.
Light plays a critical role in the lives of humans and other organisms. It is used in vision, to help organisms understand the world around them. Light also has numerous applications in science and technology, such as in communications, photography, and solar energy.
In conclusion, light is a form of electromagnetic radiation composed of photons that travel in a wave-like pattern. It has various properties, including intensity, color, and direction, that are used to explain its behavior. Light is important for vision and has various uses in science and technology.

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Answer:  An effect of continental drift is causing tectonic plates resting upon the convecting mantle to move which results in natural disasters like earthquakes, volcanic eruptions, and more.

Answer:

5. 25 [kg].

Explanation:

1) the final ratio is:

m_20kg *g=m*g/cos37°; ⇒ m= m_20kg / cos37°;

2) answer is:

m=20/0.8=25 [kg].

Answer: wrong (kind of)

Explanation:

for a), the number of hydrogens are not balanced, and the type is a combustion

b is right

Answer:

1/5 km/min

Explanation:

the formula for velocity is distance/time

so if i plug in the distance and time i get 5/25 or 1/5

Hope this helps!

To solve this problem, we can use the equations of motion for the two cars. The equations of motion for a body under constant acceleration are:

v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time taken.

s = ut + 1/2 at², where s is the distance traveled.

Let's assume that the train comes to a stop after a time of t seconds. During this time, the speed of the train decreases from 90 km/h to 0 km/h. We need to convert the speed to m/s, so we can use the standard units for the equations of motion.

a) First, let's calculate the acceleration of the train. We have the braking force, F = 30 kN, and the mass of each car, m_A = 25 Mg and m_B = 20 Mg. We can calculate the total mass of the train:

m = m_A + m_B = 25 Mg + 20 Mg = 45 Mg

Now, we can calculate the acceleration:

a = F/m = 30 kN / 45 Mg = 0.6667 m/s²

Next, we can convert the initial speed of the train to m/s:u = 90 km/h = 25 m/s

Using the equation of motion, we can calculate the time taken for the train to come to a stop:

0 = 25 - 0.6667t

t = 37.5 s

Now we can use the equation of motion to calculate the distance traveled by the train:

s = ut + 1/2 at²

s = 25 x 37.5 + 1/2 x 0.6667 x (37.5)²

s = 468.75 + 703.125

s = 1171.875 m

Therefore, the distance traveled by the train before it comes to a stop is 1171.875 meters.

b) To calculate the coupling force between the cars as the train is slowing down, we can use Newton's third law of motion, which states that every action has an equal and opposite reaction. When the brakes are applied, there is a force acting on each car in the opposite direction to the direction of motion. According to the third law, there must be an equal and opposite force acting on each car in the direction of motion. The coupling force between the cars is the force acting on car A due to car B, or vice versa.

Let's calculate the deceleration of car A. The force acting on car A is:

F_A = ma = 25 Mg x 0.6667 m/s² = 16.667 kN

The deceleration of car A is:

a_A = F_A / m_A = 16.667 kN / 25 Mg = 0.6667 m/s²

Using the equation of motion, we can calculate the speed of car A when the train comes to a stop:

0 = v_A - 0.6667 x 37.5

v_A = 25 m/s

The force acting on car A due to car B is:

F_AB = m_A x a_A = 25 Mg x 0.6667 m/s² = 16.667 kN

Therefore, the coupling force between the cars as the train is slowing down is 16.667 kN.

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Answer:bight

Explanation:

The time taken to reach the maximum height, given that the ball has an initial velocity of 22 m/s is 0.62 s

The time taken to reach the maximum height can be obtained by using the following formula:

t = uSineθ / g

Where

Now, we shall determine the time taken to reach the maximum as follow:

t = uSineθ / g

t = (22 × Sine 16) / 9.8

t = 0.62 s

Thus, the time taken is 0.62 s

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Answer:

The word ‘radiation’ is used to describe particles or waves that are emitted by an object  

In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes: electromagnetic radiation, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation (γ)

Explanation:

There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and how deeply they penetrate people and objects.

The first is an alpha particle. These particles consist of two protons and two neutrons and are the heaviest type of radiation particle. Many of the naturally occurring radioactive materials in the earth, like uranium and thorium, emit alpha particles

The second kind of radiation is a beta particle. It's an electron that is not attached to an atom. It has a small mass and a negative charge. Tritium, which is produced by cosmic radiation in the atmosphere and exists all around us, emits beta radiation. Carbon-14, used in carbon-dating of fossils and other artifacts, also emits beta particles. Carbon-dating simply makes use of the fact that carbon-14 is radioactive. If you measure the beta particles, it tells you how much carbon-14 is left in the fossil, which allows you to calculate how long ago the organism was alive.

The third is a neutron. This is a particle that doesn't have any charge and is present in the nucleus of an atom. Neutrons are commonly seen when uranium atoms split, or fission, in a nuclear reactor. If it wasn't for the neutrons, you wouldn't be able to sustain the nuclear reaction used to generate power.

The last kind of radiation is electromagnetic radiation, like X-rays and gamma rays. They are probably the most familiar type of radiation because they are used widely in medical treatments. These rays are like sunlight, except they have more energy. Unlike the other kinds of radiation, there is no mass or charge. The amount of energy can range from very low, like in dental x-rays, to the very high levels seen in irradiators used to sterilize medical equipment.

The Maxwell equation ∇ × E = -∂B/∂t can be used to predict the magnetic field in a region of space in which the electric flux is changing.

The Maxwell equation ∇ × E = -∂B/∂t is one of the four Maxwell equations that describe the behavior of electric and magnetic fields. It relates the curl of the electric field to the time rate of change of the magnetic field. In other words, it describes how a changing electric field creates a magnetic field.

This equation is important in the study of electromagnetic waves, which are generated by changing electric and magnetic fields. When an electric field changes in time, it creates a magnetic field, which then creates an electric field, and so on, creating a self-sustaining wave.

The equation can be used to predict the behavior of electromagnetic waves in space, as well as the behavior of electric and magnetic fields in the presence of each other.

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Distance between Davien's school and beach, D = 50 km.

Also, Davian's house is 10 km closer to the beach than the school.

So, distance between Davien's house and beach, d = 40 km.

Speed of Davian, s = 40 km/h.

Now, time taken is given by :

\(t =\dfrac{Distance}{Speed}\\\\t=\dfrac{40}{40}=1\ hour\)

Therefore, Davien reach the beach at 1 : 30 P.M .

Hence, this is the required solution.

The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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Spraying an asphalt road with water will make it easier to walk across and bare feet on a hot sunny day because it has a high specific heat capacity.

This is referred to as the amount of heat which is required to raise the temperature of the unit mass of a given substance by a given amount.

Water as a compound has a very high specific heat capacity which means that it needs a high amount of heat for the temperature to change. This therefore means that when the water is sprayed on the surface, the road doesn't become too hot and can be walked on with the barefoot which makes it the correct reason.

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The required correct answer would be either A (up) or B (down), depending on the specific configuration of the magnetic field and the motion of the electron.

The direction of the acceleration of the electron depends on the interaction between the magnetic field and the motion of the electron. According to the right-hand rule for magnetic fields, the direction of the acceleration can be determined as follows:

Extend the right hand with the thumb pointing in the direction of the electron's velocity (left to right).

Curl the fingers of the right hand in the direction of the magnetic field (into the page).

The direction in which the palm of the hand faces indicates the direction of the acceleration.

Using this right-hand rule, we can determine that the acceleration of the electron will be perpendicular to both the velocity and the magnetic field. Therefore, the acceleration will be either up or down, depending on the specific orientation of the magnetic field and the motion of the electron.

Given the options provided, the correct answer would be either A (up) or B (down), depending on the specific configuration of the magnetic field and the motion of the electron.

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a)The wavelength of the electromagnetic wave is approximately 1.36×10^(-4) meters.

b)The difference in energy between the two photons is approximately 3.26×10^(-19) J - 2.92×10^(-19) J = 3.4×10^(-20) J.

The wavelength (λ) of an electromagnetic wave can be calculated using the equation λ = c / ν, where c is the speed of light and ν is the frequency of the wave.

a) For a frequency of 2.21×10^12 s^(-1):

λ = c / ν

λ = 3.00×10^8 m/s / (2.21×10^12 s^(-1))

λ ≈ 1.36×10^(-4) m

b) To calculate the difference in energy between two photons with different wavelengths (λ), we can use the equation ΔE = hc / λ, where h is Planck's constant (6.626×10^(-34) J⋅s) and c is the speed of light.

For λ = 681 nm:

ΔE = (6.626×10^(-34) J⋅s × 3.00×10^8 m/s) / (681×10^(-9) m)

ΔE ≈ 2.92×10^(-19) J

For λ = 385 nm:

ΔE = (6.626×10^(-34) J⋅s × 3.00×10^8 m/s) / (385×10^(-9) m)

ΔE ≈ 3.26×10^(-19) J

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The symbol “g” can be used to refer to the acceleration due to gravity. “g” can also have another unit. N/kg, is the another unit used to represent "g".

The correct answer is option C.

The unit of "g" that is also used to represent another unit is option C, N/kg. In physics, the symbol "g" is commonly used to represent the acceleration due to gravity, which is approximately 9.8 m/s² on the surface of the Earth. This means that every kilogram of mass experiences a force of 9.8 Newtons when subjected to Earth's gravitational field.

The unit N/kg represents the Newton per kilogram, which is the unit of gravitational field strength or gravitational acceleration. This unit describes the force experienced by a mass per unit mass. In other words, it represents the gravitational force acting on each kilogram of mass.

To understand this concept, let's consider the formula for gravitational force:

F = m * g

where F is the force, m is the mass, and g is the gravitational acceleration. In this equation, the unit of force is Newtons (N), and the unit of mass is kilograms (kg). Therefore, to have consistent units, the gravitational acceleration "g" must have the unit N/kg.

Option A, J/kg, represents the unit of energy per unit mass, which is the joule per kilogram. Option B, J/kg², represents the unit of energy per unit mass squared, which is not directly related to the gravitational acceleration. Option D, N/kg², represents the unit of force per unit mass squared, which is also not directly related to the gravitational acceleration.

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Answer: Gravitational forces are action-at-a-distance forces

Explanation:

Gravitational forces are action-at-a-distance forces that act between two objects even when they are held some distance apart. For example If you watch a roller coaster car move along its course, then you are witnessing an action-at-a-distance.

The frequency of the G allele in the population is 0.4, the correct option is B. 0.4.

The frequency of beetles with glabrous elytra in a population of ground beetles is 0.36. The frequency of the G allele is to be calculated, assuming that the population is in Hardy-Weinberg equilibrium.

What is Hardy-Weinberg equilibrium? The Hardy-Weinberg equilibrium is a model that describes the genetic makeup of a non-evolving population.

This model postulates that the genetic variation in a population remains constant from generation to generation in the absence of disturbing influences such as mutation, migration, or natural selection.

According to the Hardy-Weinberg equilibrium, the frequency of alleles and genotypes remains constant if certain conditions are met.

The Hardy-Weinberg equilibrium is represented by the following equation:p2 + 2pq + q2 = 1 Where:p2 = frequency of homozygous individuals (GG)2pq = frequency of heterozygous individuals (Gg)q2 = frequency of homozygous recessive individuals (gg)p + q = 1Now let's move on to the calculation of the frequency of the G allele.

The frequency of individuals with the gg genotype can be obtained from the following equation:q2 = 0.36q2 = 0.36^(1/2)q = 0.6

The sum of the frequency of all genotypes must be equal to 1, which can be used to calculate the frequency of the G allele:p + q = 1p = 1 - qp = 1 - 0.6p = 0.4The frequency of the G allele in the population is 0.4.Therefore, the correct option is B. 0.4.

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Answer:· A model is a description of natural phenomenon that scientists can use to make predictions. A good model is both as accurate as possible and as simple as possible, which makes it not only powerful but also easy to understand. However, no matter how good they are, models will almost always have limitations.

Explanation:

Answer:

A) Availability

Explanation:

Right on Edge 2021

Answer:

Availability

Explanation:

edge

When the electron is 10 cm away from the 3.3 nc charge, its speed is 5.34 × 10⁷ m/s.

To solve this problem, we can use the principle of conservation of energy. We can assume that the electron starts with zero kinetic energy and potential energy equal to the electric potential energy due to the two charges. As the electron moves towards the 3.3 nc charge, it gains kinetic energy and loses potential energy. We can use the law of conservation of energy to find the speed of the electron at the point where it is 10 cm from the 3.3 nc charge.

The electric potential energy of a point charge q at a distance r from another point charge Q is given by:

⇒ U = k × Q × q / r

where k is the Coulomb constant, Q and q are the magnitudes of the charges, and r is the distance between them.

The initial potential energy of the electron is:

⇒ U_i = k × (3.3 nc) × (1.6 nc) / (0.31 m / 2)

⇒ U_i = 1.71 × 10⁻¹⁸ J

When the electron is 10 cm from the 3.3 nc charge, its distance from the 1.6 nc charge is 21 cm. The electric potential energy of the electron at this point is:

⇒ U_f = k × (3.3 nc) × (-1.6 nc) / (0.21 m)

⇒ U_f = -3.41 × 10⁻¹⁸ J

The change in potential energy of the electron is:

⇒ ΔU = U_f - U_i

⇒ ΔU = -5.12 × 10⁻¹⁸ J

By conservation of energy, the change in potential energy must be equal to the kinetic energy of the electron:

⇒ ΔU = (1/2) m v²

where m is the mass of the electron and v is its speed.

Substituting the given values, we get:

⇒ (1/2) m v² = -5.12 × 10⁻¹⁸ J

Solving for v, we get:

⇒ v = √(-2 ΔU / m)

⇒ v = √(2 * 5.12 × 10⁻¹⁸ J / (9.11 × 10⁻³¹ kg))

⇒ v = 5.34 × 10⁷ m/s

Therefore, the speed of the electron when it is 10 cm from the 3.3 nc charge is 5.34 × 10⁷ m/s.

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Answer:

It tastes like an orange, I don't think that you can replicate taste as much as looks, I could be wrong though. But yes it is confusing.

Explanation:

Can I have brainliest? It would help me out, if not thanks anyways! Please tell me if you need me to elaborate more or show work!! I hope this helped and have a nice day!

c                                                            

Explanation: c because you said it lol

Answer:

c

Explanation: