How long will it take 240V, 3000W electric immersion heater to raise the temperature of 150 litres of water in a well-lagged calorimeter made of copper of mass 20kg from 15° to 70°C?​

Answer:

The dominant theory of the strong fields of magnetars is that it results from a magnetohydrodynamic dynamo process in the turbulent, extremely dense conducting fluid that exists before the neutron star settles into its equilibrium configuration.

How strong is a magnetar magnetic field?

It can generate the most intense magnetic field observed in the Universe. The field strength of a magnetar is one thousand trillion times stronger than Earth's and is so intense that it heats the surface to 18 million degrees Fahrenheit. We only know of about 10 magnetars in the Milky Way galaxy.

Explanation:

On a position vs time graph (x vs t), displacement is the difference in positions (Δx = x₂ − x₁).

On a velocity vs time graph (v vs t), displacement is the area under the graph (Δx = ∫ v dt).

Answer:

The false statement has to be that neruotransmitters are in the spinal cord.

Explanation:

Neruotransmitters are in no was associated with the spinal cord. That is more related to nerves and muscles. Neurotransmitters are in the Phasma Membrane acording to sciencedirect.com.

Explanation:

distance = speed x time

a- d= 350 m/s x 30s

   d= 10500m

b- 5 mins = 300 sec

    d= 350 m/s x 300s

    d= 105000 m

c-  30 mins = 1800 sec

    d= 350 m/s x 1800 s

   d=  630000 m

When two tuning forks with frequencies of 440 Hz and 522 Hz are sounding simultaneously, the beat frequency is 82 Hz.

The beat frequency, when two tuning forks with frequencies of 440 Hz and 522 Hz are sounding simultaneously, can be found using the following steps:

1: Identify the frequencies of both tuning forks. In this case, the first tuning fork has a frequency of 440 Hz, and the second tuning fork has a frequency of 522 Hz.

2: Calculate the difference between the two frequencies. To do this, subtract the lower frequency from the higher frequency: 522 Hz - 440 Hz = 82 Hz.

3: The result from the previous step is the beat frequency. In this case, the beat frequency is 82 Hz.

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Answer:

-8.3m/s

Explanation:

its correct

Answer: its 0.

Explanation: Gradpoint

The distance from the proton when the electron comes to a stop due to the electrical interaction with the proton is approximately \(1.18 x 10^-10 m.\)

To solve this problem, we can use Coulomb's law, which states that the force between two charged particles is given by:

\(F = k * q1 * q2 / r^2\)

where F is the force, k is Coulomb's constant, q ₁and q₂ are the charges of the particles, and r is the distance between them.

In this case, the charges are \(q1 = -1.6 x 10^-19 C\) (charge of the electron) and q2 = \(1.6 x 10^-19 C\) (charge of the proton). The initial velocity of the electron is 250 m/s, and we can assume that the distance between the particles is very large compared to their sizes, so we can neglect their sizes.

The force on the electron due to the proton is given by:

\(F = k * q1 * q2 / r^2\)

We can equate this force to the initial kinetic energy of the electron:

\(F = ma = 1/2 * mv^2\)

where m is the mass of the electron, v is its initial velocity, and a is the acceleration due to the force.

Solving for r, we get:

\(r = √(k * q1 * q2 / (1/2 * m * v^2))\)

Plugging in the values, we get:

r = √((\(9 x 10^9 N m^2/C^2\)) * (\(1.6 x 10^-19 C)\)\(^2\) / (1/2 * 9.1 x\(10^-31 kg *\) (250 \(m/s)^2)\))

\(r = 1.18 x 10^-10 m\)

Therefore, the distance from the proton when the electron comes to a stop due to the electrical interaction with the proton is approximately \(1.18 x 10^-10 m.\)

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Answer:

1299N

Explanation:

GIven data

Weight W= 1500N

Angle Ф= 30°

The applied force up the frictionless ramp is gotten by applying the formula below

F= WcosФ

substitute

F=1500 cos 30

F = 1500*0.8660

F= 1299N

Hence the applied force is 1299N

Answer:

17.27 Hz

Explanation:

Applying

v = λf................ Equation 1

Where v = speed of the car, λ = Distance between successive crevice, f = number of crevice moved in 1 seconds(Frequency of the vibration)

make f the subject of the equation

f = v/λ............. Equation 2

From the question,

Given: v = 38 m/s, λ = 2.2 m

Substitute these values into equation 2

f = 38/2.2

f = 17.27 Hz

The magnitude of the vector with components -14.0 units in the x-direction and 5 units in the y-direction can be calculated using the Pythagorean theorem.

The magnitude of a vector represents its length or size. In the xy plane, the magnitude of a vector with components in the x-direction (horizontal) and y-direction (vertical) can be found using the Pythagorean theorem. The theorem states that the square of the magnitude of a vector is equal to the sum of the squares of its components.

For the given vector with components -14.0 units in the x-direction and 5 units in the y-direction, we can calculate its magnitude as follows:

Magnitude = sqrt(\(14^{2} } +5^{2}\))

Magnitude = sqrt(196 + 25)

Magnitude = sqrt(221)

Magnitude ≈ 14.87 units

Therefore, the magnitude of the vector is approximately 14.87 units. This represents the length or size of the vector in the xy plane, taking into account its components in the x and y directions.

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The dishwasher would need to transfer 480 kJ of energy for 400 seconds, or 6 minutes and 40 seconds.

Power is determined by the product of force, velocity, and distance traveled (in the force's direction). For those looking to enter the teaching profession in the state of Uttar Pradesh, this is a fantastic opportunity. Voltage and current together produce electrical power P=VXI.

time = energy / power

480 kJ = 480,000 J

time = energy / power

time = 480,000 J / 1200 W

time = 400 seconds

Hence, for the dishwasher to transfer 480 kJ of energy, it would take 400 seconds, or 6 minutes, 40 seconds.

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Answer: a simple example of this would be the strong man game that can be found at most theme parks and fairs

Explanation: in the game you use a hammer to strike a buzzer or bell this causes the game to react by shooting up a small object giving you Newton’s third law your action had an equal or opposite effect on the bell and object that shoots up

The system is open, because there is a net force exerted on the block.

An individual strolling, a taking off baseball, a piece tumbling from a table and a charged molecule in an electric field are instances of dynamic energy at work. An item that isn't moving has zero motor energy.

The energy an item has as a result of motion is known as kinetic energy. A force must be applied to an item in order to accelerate it. We must put forth effort in order to apply a force. After the job is finished, energy is transferred to the item, which then moves at a new, constant speed.

According to question:

On graphing free body diagram of the problem

There is a force = mgsin(37°)

So, the it is a open system.

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Answer:

here is your answer

Explanation:

here is your answer

The resultant force on the object is

∑ F = 〈0, 8〉 N + 〈6, 0〉 N = 〈6, 8〉 N

which has a magnitude of

F = √((6 N)² + (8 N)²) = √(100 N²) = 10 N

By Newton's second law, the acceleration has magnitude a such that

F = m a

10 N = (2 kg) a

a = (10 N) / (2 kg)

a = 5 m/s²

so the answer is B.

b. false. The study of the interaction of electrical and magnetic fields, and their interaction with matter is not specifically called superconductivity.

Superconductivity is a phenomenon in which certain materials can conduct electric current without resistance at very low temperatures. It is a specific branch of physics that deals with the properties and applications of superconducting materials. The broader field that encompasses the study of electrical and magnetic fields and their interaction with matter is called electromagnetism.

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Answer:

3200

Explanation:

Answer:

D

Explanation:

The two types of ignition systems mentioned are Electronic Ignition (EI) and Magneto Ignition (MI).

Electronic Ignition (EI): Electronic ignition systems use electronic components such as sensors, control units, and ignition coils to generate and control the spark for combustion in the engine.

These systems typically rely on solid-state electronics and can provide precise ignition timing and better performance compared to traditional ignition systems.

Magneto Ignition (MI): Magneto ignition systems generate electricity for the spark plug directly from a rotating magnet or magneto. This type of ignition system is commonly used in small engines, such as those found in lawnmowers, motorcycles, and older aircraft engines.

Magneto ignition systems are self-contained and do not rely on an external power source, making them reliable and suitable for use in engines where a battery or external power supply may not be available.

Other types of ignition systems you mentioned, such as Distributor Ignition (DI), Multispark Ignition (MSI), and Ground Circuit Ignition (GCI), are not as widely known or commonly used as Electronic Ignition and Magneto Ignition. These terms might be specific to certain contexts or manufacturers.

Hence, The two types of ignition systems mentioned are Electronic Ignition (EI) and Magneto Ignition (MI).

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Answer:

Consensus: the extent to which other people behave in the same way in a similar situation.

Consistency: refers to the way in which minority influence is more likely to occur if the minority members share the same belief and retain it over time.

Distinctiveness: refers to the extent to which a specific action engaged in by an individual is unusual or uncommon for that particular individual

Answer:

La materia es la sustancia de la que está hecho todo material. En física, el sistema es una de las propiedades de la materia. Se puede transferir entre objetos y convertir en forma. No se puede crear ni destruir.

espero que te ayude!

The diameter that the the new wire will have is A. r/R = ✓2.

When a spring is stretched or compressed by an amount x from its equilibrium length, it exerts a force F = -kx in the direction of its equilibrium position. The force exerted by a spring is a restoring force, acting to return the spring to its equilibrium length.

Pulling forces cause stretching. We must pull on a spring to stretch it. This can be accomplished by attaching some small weights to the end of the spring, causing it to change length.

As there is no stretching, the volume of the wire will be the same after the length doubling.

r = diameter when the length was L

R = diameter when the length is 2L.

Conserving volume

πr²L = πR² (2L)

r/R = ✓2.

The correct option is Option A.

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Renewable energy sources account for about 24% of the energy used in the United States.

We anticipate that, up from 20% in 2021, renewable sources will generate 22% of the nation's electricity in 2022 and 24% in 2023.

Biomass energy (such as ethanol), hydropower, geothermal energy, wind energy, and solar energy are examples of renewable resources. Organic material from plants or animals is referred to as biomass. This comprises ethanol, wood, and sewage.

By 2030, the White House set a goal of producing 80% renewable energy, and five years later, 100% carbon-free electricity. In order to reach this target, billions of dollars will need to be invested because, as of 2021, fossil fuels still accounted for 79% of all U.S. energy output.

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Answer: Cosmology

Explanation:

The particle moves to the right through a potential difference of Vb-Va =0.500 V. The correct answer is C.

We can use the relationship between the electric potential difference (V) and electric force (F) on a charged particle to identify the direction and potential difference through which the particle moves.

The equation describes the work an electric force does on a charged particle.

Fdcos = W∅

where ∅ is the angle formed between the force's direction and the particle's displacement, d is the distance traveled by the particle, and F is the electric force.

In this instance, the angle between the force's direction and the particle's displacement is zero since the particle is solely affected by the electric force and moves along the x-axis, and the work done by the electric force is represented by W = Fdx.

Therefore, Vb - Va = W/q, where q is the particle's charge, gives the potential difference between points a and b.

The work-energy principle stipulates that work done on a particle is equal to the change in kinetic energy, therefore we can say that the work done on the particle is equal to 1.60x10⁻¹⁹ J given that the particle's kinetic energy increases by this amount.

The sign of the potential difference can now be used to determine the force's direction because the electric force is provided by

F = -q(dV/dx).

Since the electric force is directed in the opposite direction to the direction the particle is moving because of the positive potential difference, the particle is moving to the right.

As a result, the particle goes to the right through a Vb-Va = 0.500 V potential difference.

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The theoretical angle required to launch the puck so that it goes up the same distance in the y direction as it travels in the x direction is 45 degrees.

To understand why the theoretical angle is 45 degrees, we can consider the motion of the puck on the table. Since the table is a square, the distance traveled in the x direction is equal to the distance traveled in the y direction when the puck reaches the right corner.

When an object is launched at an angle, its horizontal and vertical motions can be treated independently. In this case, the puck's motion in the x direction is determined by its initial velocity and the time it takes to reach the right corner. Similarly, the motion in the y direction is determined by the initial velocity and the time it takes to reach the same height.

For the puck to travel the same distance in the y direction as in the x direction, we need the vertical displacement to be equal to the horizontal displacement. This can be achieved when the angle of launch is 45 degrees.

At this angle, the horizontal and vertical components of the initial velocity are equal. As a result, the puck will travel the same distance in the y direction as it does in the x direction, reaching the right corner of the table.

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The Position-Time graph for the given Velocity-Time graph is drawn in the image attached.

From the Velocity-Time graph we can take the information needed.

\(t_{1}\) = 1 s

\(t_{2}\) = 2 s

\(t_{3}\) = 3 s

\(t_{4}\) = 4 s

\(t_{5}\) = 5 s

\(v_{1}\) = 10 m / s

\(v_{2}\) = 20 m / s

\(v_{3}\) = 30 m / s

\(v_{4}\) = 40 m / s

\(v_{5}\) = 50 m / s

v = d / t

d = v * t

\(d_{1}\) = 10 * 1 = 10 m

\(d_{2}\) = 20 * 2 = 40 m

\(d_{3}\) = 30 * 3 = 90 m

\(d_{4}\) = 40 * 4 = 160 m

\(d_{5}\) = 50 * 5 = 250 m

Therefore, the Position-Time graph is drawn in the image attached.

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Answer: 20.4 m

Explanation: \(\frac{9.8^{2} }{Velocity} = Max Height\)

The answers to this test are:

1.  What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?  

24.2 m/s

2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?

20.4 m

3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?

22.5 m/s

4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?

109,375 J

5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?

It is easy to calculate new scenarios.

If the rods P and Q repel each other, that means they have the same charge signs (both are positive or both are negative)

Since the rods P and R attract each other, that means they have opposite charge signs (one is positive and the other is negative).

Looking at the options, the only one that can represent the signs of the charges on the rods is the third option. (P and Q have the same charge sign, P and R have different charge signs)

Answer:

Yes, Most living thing need oxegen, plants need light to grow(food).

plants and animals need water. temputre is important too, most living things need a  tempure range. therefor, all(most) living things need these 5 thing to live.

just rewrite this in your own word

Hope this helped you

Red.