A solenoid with an self-inductance L carries a current described by i(t)=I0sin(60πt) Which of the given equations describes the EMF induced in the coil?
a. ε=−LI0cos(60πt)
b. ε=−60πLI0sin(60πt)
c. ε=−LI0sin(60πt)
d. ε=−60πLI0cos(60πt)

Answer:

I think the first two one is 70 the second on is 14

I hope this helps if I’m wrong I’m sorry

Explanation:

Answer:Speed is the time rate at which an object is moving along a path

Velocity is the rate and direction of an object's movement.

Explanation:

Hope it helps

Answer:

C.

A factor of something is an ingredient, or it makes up that thing. For example, in math, we always try to find the factors of a number. We are basically trying to find the "ingredients" of a number.

Explanation:

id : 237 514 2470

pass : frmCV5

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Answer:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

Explanation:

An atom has an equal quantity of positive and negative electric charges (the protons and electrons) when its electron and proton counts are equal (the protons). Since the atom has a total electric charge of zero, it is referred regarded as being neutral.

The atom is the smallest unit of matter that may be divided without resulting in electrically charged particles. Additionally, it is the tiniest substance with features like chemical elements. The atom is therefore the basic building block of chemistry.

Examine different electron arrangements in the electron shells that surround an atom's nucleus.

Examine different electron arrangements in the electron shells that surround an atom's nucleus. The rest is made up of a cloud of negatively charged electrons surrounding a positively charged nucleus made up of protons and neutrons. Compared to electrons, which are the lightest charged particles in nature, the nucleus is small and dense.

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Answer:

22600 cm³ (3 s.f.)

Explanation:

Please see the attached picture for the full solution.

Answer:

Explanation:

\(m =800kg\\v = 15\\\\K.E = \frac{1}{2}mv^2\\ K.E= \frac{1}{2} \times 800\times 15^2\\= 400 \times 225\\= 90000 joules\\= 90 kilojoules\)

Answer: 210 cm

Explanation:

Look up Thin Lens Equations Calculator- it helps!

Answer:

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According to the question, 80 m/s fast must she have been running before the collision.

Collision is a situation that occurs when two objects or particles interact in such a way that they come into contact with each other, resulting in a change in their motion. Collisions can be elastic, inelastic or partially inelastic.

The girl's momentum before the collision was equal to her mass (40 kg) multiplied by her velocity (v). The momentum of the shopping cart and groceries before the collision was equal to its mass (80 kg) multiplied by its velocity (0 m/s). Since momentum is conserved in this collision, the total momentum before and after the collision must be equal.

Therefore, 40v + 0 = 40v + 80(m/s).

Solving for v, we get v = 80 m/s. This means that the girl must have been running at a speed of 80 m/s before the collision in order for the shopping cart and groceries to roll away together at a speed of m/s.

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Answer:

About 22 hours in flight time.

Explanation:

It wouldn't give me the walking time.

Hope I helped ya.

< Sarah >

Answer:

Hmm idk u was tryna take the trip or sum

Explanation:

Answer:

height =20m

Explanation:

gpe=mgh

800=4×10×x

40x=800

x=20

A moving van smoothly travels at constant speed with a stone softly affixed to the center of its roof ( velocity). When the glue fails, the stone tumbles to the ground and lands precisely below the ceiling's middle.

In terms of physics, velocity is a vector measure of the motion's direction and speed. The shift that occurs in an object's position relative to a reference point and time is a more precise definition of velocity.

Why is it wrong to use the phrases velocity and speed interchangeably? It is clear why. Velocity, as opposed to speed, refers to the pace and direction of the an object's movement as it moves down a path.

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Answer:

Velocidad promedio = 5.29 m/s

Explanation:

Dados los siguientes datos;

Distancia = 900 m

Tiempo = 170 segundos

Para encontrar la velocidad media;

La velocidad se puede definir como la distancia recorrida por unidad de tiempo. La velocidad es una cantidad escalar y, como tal, tiene magnitud pero no dirección.

Matemáticamente, la velocidad viene dada por la fórmula;

\( Velocidad = \frac{distancia}{tiempo}\)

Sustituyendo en la fórmula anterior;

\( Velocidad = \frac{900}{170}\)

Velocidad = 5.29 m/s

Por lo tanto, la velocidad promedio del automóvil es 5.29 metros por segundo.

Answer:

Explanation:

Young's modulus is the property of the material and it does not depend upon the length or the area of the cross-section.
Hence, The most correct answer will be option (iii) but youngs modulus also depends upon the nature of the matter if you have to answer multiple option then (iii) and (iv) both are correct. If you have to answer only single option then go for option (iii).

A star that is located on the points or circles in the sky listed in the the celestial equator.So option C is correct.

If we find a star that is located on the celestial north pole, celestial equator, or celestial south pole, and then move to a different location on Earth, the star that was initially on the celestial north pole will no longer be on the celestial north pole. Similarly, the star that was initially on the celestial south pole will no longer be on the celestial south pole. However, the star that was initially on the celestial equator will still be on the celestial equator, regardless of the change in location on Earth.Therefore option c is correct.

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Given details :

1.Force equilibrium in x direction

∑ \(F{x}\) = 0

F - 39 cos Ф = 0

As Ф = 38°

F = 39 cos38°

F = 30.73 N

Force equilibrium in y direction

∑ \(F{y}\) = 0

N = W + P sin38°

   =  70 + 39 sin38°

N = 93.79 N

Thus the normal force on chair = 93.79 N

From the free body diagram

F = μN

30.73 = μ x 93.79

μ = 30.73 / 93.79 = 0.32

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Power is the rate at which work is done. The unit of power is the watt (W), which is equal to one joule per second (J/s).Given: Power output, P = 1135 W Distance traveled, d = 104 m Time taken, t = 58 s Acceleration due to gravity, g = 9.80 m/s²To find:

Power, P = Work done / Time taken We know that Power, P = Force x Velocity We know that Velocity, v = Distance / Time We know that Work done, W = Force x Distance We know that Force, F = m x g By combining the above equations, we get Power, P = Force x Velocity => P = (m x g) x (d / t)Work done.

P = Work done / Time taken => P = (m x g x d) / t Solving for mass, m we getm = (P x t) / (g x d)Substituting the values, we getm \(= (1135 W x 58 s) / (9.8 m/s² x 104 m\))Therefore, the mass of the elevator is 594 kg approximately.  Hence, the mass of the elevator is 594 kg approximately, and the answer is more than 100 words.

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To calculate the self-inductance of an ideal solenoid, you can use the formula:

L = (μ₀ * N² * A) / l

where L is the self-inductance, μ₀ is the permeability of free space (4π × 10⁻⁷ T∙m/A), N is the number of turns of wire, A is the cross-sectional area, and l is the length of the solenoid.

Given the values in your question:
N = 1000 turns
A = 1.00 × 10⁻⁴ m²
l = 300 cm = 3 m (converted to meters)

Now, plug the values into the formula:

L = (4π × 10⁻⁷ T∙m/A * (1000)² * 1.00 × 10⁻⁴ m²) / 3 m

L ≈ 4.19 × 10⁻⁴ H

So, the self-inductance of the ideal solenoid is approximately 4.19 × 10⁻⁴ H (henrys).

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The work per unit charge required to move a charge between two points in an electric circuit electric potential difference. The right option is D) potential difference

Potential difference can be defined as the work done in moving a unit charge from one point to another in an electric field. The S.I unit of potential difference is volts (V).

From the question,

Hence, from the above, the right option is D) Potential difference

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To determine the distance spanned by the diffraction spot, we need to consider the properties of the diffraction pattern and the given information.

Given:

- The screen is 30 cm behind the fish.

- The entire path of the laser, including the water and tissue, has an index of refraction close to that of water.

- The properties of the diffraction pattern are determined by the wavelength in water.

Since the diffraction pattern is formed by the interaction of light waves with obstacles or apertures, the spot's size or spread depends on factors such as the wavelength of light and the size of the aperture.

Without specific information about the wavelength or aperture size, it is not possible to determine the exact distance spanned by the diffraction spot. Additional details regarding the specific setup or measurements would be necessary to calculate or estimate the distance spanned by the diffraction spot.

Please provide further information or clarify the parameters related to the diffraction setup if you require a more specific answer.

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According to the information, we can infer that the presence of several types of vegetation in the Arab world can be attributed to factors such as diverse climate conditions, varying topography, and historical human activities.

The presence of diverse vegetation in the Arab world can be explained by various factors. Firstly, the region's wide range of climate conditions and topography contributes to the growth and distribution of different plant species. Factors such as moisture, temperature, and sunlight play a role in determining the types of vegetation found in different areas.

Secondly, historical human activities have influenced vegetation patterns. Traditional farming practices, irrigation systems, and land use practices have introduced and cultivated various plant species. Techniques like terracing and oasis cultivation have supported the growth of specific vegetation types in specific regions.

Lastly, the Arab world's location at the intersection of different biogeographic regions has resulted in a rich biodiversity. This has led to the presence of plant species adapted to various ecological niches, including coastal areas, mountains, and semi-arid regions.

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The velocity of the plane is approximately 7166.67 km/h.

The rate at which an item changes its location in a certain direction over a predetermined amount of time is referred to as velocity in the study of physics. Due to the fact that it is a vector quantity, it possesses both magnitude and direction. The direction of velocity describes whether an object is moving in a straight line or along a curved path, whereas the magnitude of velocity represents the object's speed.

To calculate the velocity of the plane, can use the formula:

Velocity = Distance / Time

Given:

Distance = 86000 km

Time = 12 hours

Putting the values, may get:

Velocity = 86000 km / 12 hours

To obtain the velocity in km/h, we divide the distance by the time:

Velocity = 7166.67 km/h

So, the velocity of the plane would be approximately 7166.67 km/h.

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Answer:

I'm not sure but I think it is electric currents in the outer core

Answer: 1.25

I did it and got it right

The coefficient of friction is 0.25

The coefficient of friction is the ratio of friction force to normal reaction . It is a constant quantity and depends only on the nature of the surface .

Here,

Frictional force  f =  50 N

Normal reaction N =  200 N

coefficient of friction = μ

So,  μ  = f/N  = 150/ 200 = 0.25

Hence the coefficient of friction is 0.25

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Answer:

the theme is acceptably of others

Explanation:

hope this helps

Since the baseball is moving, it has kinetic energy.

Since the baseball has a certain height (it's not moving on the ground, it's moving above the ground), so it also has gravitational energy.

The ball itself has a certain temperature and has a molecular structure that holds energy, so the ball has internal energy.

And the ball has a certain deformation, that holds some elastic energy.

Therefore the correct option is B.

Answer:

\(T=62.9*10^{-9}\)

Explanation:

From the question we are told that:

Index of refraction of Rinestones \(\gamma_1 =1.5\)

Index of refraction of silicon \(\gamma_2 =2.0\)

Wavelength  \(\lambda=576nm=576*10^{-9}\)

Let each layer have thickness T

Therefore

Total Thickness =2T

Generally the equation for  Constructive interference is mathematically given by

\(2T=(m+0.5)\frac{l\lambda}{\gamma_2}\)

Where

 \(M=0\)

 \(2T=(0+0.5)\frac{576*10^{-9}}{2*2.0}\)

 \(T=62.9*10^{-9}\)

In order to help Scarlett retrieve her toy train from the lake, the wooden fishing rod can be modified or adapted by Attaching a magnet, Adding a hook or grappling device, and Using a net or scoop.

Attaching a magnet: Scarlett can attach a strong magnet to the end of the fishing rod. Since the train contains parts made of steel, the magnet will be attracted to the metallic components. By carefully maneuvering the magnet with the fishing rod, Scarlett can potentially attract and retrieve the train from the water.

Adding a hook or grappling device: Scarlett can affix a hook or grappling mechanism to the fishing rod. By casting the hook near the location where the train fell into the lake and skillfully maneuvering the rod, she can attempt to hook onto the train or one of its parts. With a successful hook, she can slowly reel in the train and bring it back to shore.

Using a net or scoop: If the toy train is floating on the surface of the lake or near the shallow edges, Scarlett can attach a net or scoop to the end of the fishing rod. By carefully positioning the net or scoop around the train, she can scoop it up and safely retrieve it without causing any damage.

It's important to note that the success of these modifications will depend on factors such as the depth of the lake, the accessibility of the train, and the size and weight of the fishing rod. Additionally, adult supervision or assistance may be necessary to ensure safety, especially if the lake is deep or poses any hazards.

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