a 13 h inductor carries a current of 1.7 a. at what rate must the current be changed to produce a 52 v emf in the inductor?

The buoyant forces acting on the two balls will be the sam. This is because buoyant force is determined by the volume of the object and not the depth at which it is submerged.

The buoyant force is the same for any object of the same volume regardless of the depth.

The buoyant force is an upward force exerted on a submerged object by the surrounding liquid. The magnitude of this force is equal to the weight of the liquid displaced by the object. This force is commonly used to explain why objects float in water.

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According to the elastic rebound theory, rocks do not constantly move in response to stress because their rough and irregular surfaces generate frictional resistance.

When stress is applied to rocks, they deform elastically, meaning they temporarily change shape without permanently displacing. As the stress continues to accumulate, the rocks reach their elastic limit, and the stored energy is suddenly released.

This release of energy causes the rocks to rapidly rebound back to their original shape, resulting in seismic waves and an earthquake.

The rough and irregular surfaces of the rocks create points of contact that resist movement and contribute to the buildup and eventual release of stress energy.

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The buoyant force exerted on the empty storage tank by the air of 0°C and 1 atm is 1163.44 N

We know that,

\(F_{B}\) = ρ V g

where,

\(F_{B}\) = Buoyant force

ρ = Density

V = Volume

g = Acceleration due to gravity

Given that,

V = 3250 ft³ = 92.03 m³

g = 9.8 m /s²

ρ = 1.29 kg / m³

\(F_{B}\) = 1.29 * 92.03 * 9.8

\(F_{B}\) = 1163.44 N

Buoyant force is the force exerted on a object which is partially or completely immersed in a fluid. This force acts upwards. So it is also called as up thrust.

Therefore, the buoyant force exerted on the empty storage tank by the air of 0°C and 1 atm is 1163.44 N

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The power gain when the gain falls by 3 dB is approximately 300.7 mW, which is closest to option D: 244.2 mW.

The power gain of an amplifier can be calculated using the formula:

Power Gain (dB) = 10 * log10(Pout / Pin)

where Pout is the output power and Pin is the input power. In this case, the midrange gain of the amplifier is given as 600 mW.

To calculate the power gain when the gain falls by 3 dB, we need to find the new output power. Since the gain is decreasing, the new output power will be lower than the initial power.

First, we convert the midrange gain from milliwatts to watts:

Midrange Gain = 600 mW = 0.6 W

Next, we use the formula:

Pout / Pin = 10^(Power Gain / 10)

Since the gain falls by 3 dB, the new power gain is:

Power Gain = -3 dB

Now we substitute the values into the formula:

Pout / Pin = 10^(-3 / 10)

Pout / Pin = 10^(-0.3)

Pout / Pin = 0.5012

To find the new output power (Pout), we multiply the input power (Pin) by the ratio:

Pout = Pin * 0.5012

Pout = 0.6 W * 0.5012

Pout = 0.3007 W

Finally, we convert the output power back to milliwatts:

Pout = 0.3007 W = 300.7 mW

Therefore, the power gain when the gain falls by 3 dB is approximately 300.7 mW, which is closest to option D: 244.2 mW.

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Answer:

I think the answer is c

Explanation:

I had this problem once

In order of appearance on the table;

Magnetic force

Normal force

Gravity

String force

Friction

Contact force

Tension

Non Contact force

Static force

Applied force

please mark BRAINLIEST if I'm right.

The photoelectric effect's cutoff wavelength is 295.98 nm. (b) The stopping potential is 2.70625 V if the incident light has a wavelength of 180 nm.

How to get KEmax=|eV0|, the equation for a photoelectron's stopping voltage. Hint: The stopping voltage (or stopping potential) refers to the voltage difference required to stop electrons from passing between plates and creating a flow in the photoelectric analysis.

Derivation of the Photoelectric Effect and the Stopping Potential Formula

According to Einstein's photoelectric equation

(0.6+2.14)eV

1242eVnm

​

=454nm

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There could be several reasons why a 4-cylinder reciprocating engine continues to run after the ignition switch is turned off. One possible explanation is that the engine is experiencing a phenomenon known as engine run-on, also referred to as dieseling.

Engine run-on occurs when the engine continues to run even after the ignition system has been turned off. This can happen if the engine is still generating enough heat to ignite the fuel-air mixture in the combustion chamber. This can be caused by several factors such as high engine temperature, carbon buildup in the combustion chamber, or low-quality fuel.

Another possible cause could be a faulty ignition switch or wiring. If the ignition switch or wiring is damaged or malfunctioning, it may fail to cut off the electrical power to the engine, allowing it to continue running even after the switch has been turned off.

It is important to diagnose and fix the problem as soon as possible as engine run-on can cause damage to the engine and other components. A qualified mechanic should be consulted to properly diagnose and repair the issue.

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The Planet on its axis often contributes to the deflection created by the Coriolis force.

Moving objects in a reference point that rotates relative to an inertial frame are affected by an imagined or inertial force known as the Coriolis force. the force acting left of a object . an object in a frame of reference rotating in a clockwise direction.

Rotation: Rotation, often known as spin, is the cyclical motion of an object about a fundamental axis.

A two-dimensional rotating object can only have one possible central axis.

Such things have an axis that may rotate either counterclockwise or clockwise.

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The correct option to explain the conversion of kinetic energy to potential energy is Option 1: The teacher put a book at the top of the shelf.

Kinetic energy is the energy an object has due to its motion, and potential energy is the energy an object has due to its position or state. The transition from kinetic energy to potential energy occurs when an object's motion is converted into energy that affects its position or height.

In the scenario given, when the teacher puts a book high on the shelf, the book starts to have kinetic energy due to the teacher's action. However, when the teacher took the book and put it on the shelf, the movement of the book stopped.

This means that the kinetic energy of the book is reduced and converted into potential energy.

The higher a book is carried on a shelf, the greater its capacity. This is because potential energy is related to the height or height of an object relative to the reference point. By placing the book higher on the shelf, the teacher increases its potential energy and decreases its kinetic energy.

Therefore, option I specifies the conversion of kinetic energy to potential energy when the teacher puts the book at the top of the shelf.

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SMM2 refers to the Standard Method of Measurement 2. It is a document that specifies the method and processes used in measuring buildings and civil engineering works. SMM2 is commonly used in the construction industry.

The following are explanations of the clauses under Standard Method of Measurement 2 (SMM2):

i. D.10: This clause under SMM2 relates to the painting of metal and timber surfaces. It stipulates that when painting the surfaces of timber or metal, the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

ii. D.12.4: This clause under SMM2 refers to the construction of walls using concrete blocks. It states that the concrete blocks used should have a minimum density of 1500 kg/m3. It also outlines specific measurements for the thickness of the mortar to be used for bonding the blocks together. The clause further specifies the measurement of the joint thickness between blocks.

iii. D.12.6: This clause under SMM2 refers to the rendering of walls with a cement mortar mix. It specifies that before rendering, the surface of the wall must be clean, dry, and free of debris. It also outlines specific measurements for the thickness of the rendering to be applied to the wall. The clause then stipulates that the rendering should be finished with a smooth surface that conforms to the architect's specifications.

iv. D.12.8: This clause under SMM2 refers to the painting of interior plastered walls. It stipulates that the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

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Answer:

No

Explanation:

I dont know please help

The intermolecular forces present in water include hydrogen bonding and dipole-dipole interactions.

Water is a polar molecule, meaning it has a positive and a negative end due to an uneven distribution of electron density. This polarity gives rise to intermolecular forces that hold water molecules together.

One of the intermolecular forces present in water is hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom, which is covalently bonded to an electronegative atom (in this case, oxygen), is attracted to another electronegative atom (such as oxygen or nitrogen) in a different molecule. In water, the oxygen atom of one water molecule forms a hydrogen bond with a hydrogen atom of a neighboring water molecule. Hydrogen bonding is a strong intermolecular force and contributes to many of the unique properties of water, such as its high boiling point and surface tension.

In addition to hydrogen bonding, water also exhibits dipole-dipole interactions. Dipole-dipole interactions occur between the positive end of one polar molecule and the negative end of another polar molecule. In water, the positive hydrogen end of one water molecule is attracted to the negative oxygen end of a neighboring water molecule. These dipole-dipole interactions are weaker than hydrogen bonds but still contribute to the overall intermolecular forces present in water.

Other intermolecular forces, such as ion-dipole interactions and London dispersion forces, are not as significant in water compared to hydrogen bonding and dipole-dipole interactions. Ion-dipole interactions occur between an ion and the charged end of a polar molecule, while London dispersion forces arise from temporary fluctuations in electron distribution. While these forces may exist in other substances, they play a relatively minor role in the intermolecular forces of water.

In conclusion, the intermolecular forces present in water are primarily hydrogen bonding and dipole-dipole interactions. These forces contribute to the unique properties and behavior of water as a liquid.

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Answer:

v = 1.5 m/s

Explanation:

m = 85 kg

p = 125 kg m/s

v = ?

p = m v

125 kg m/s = (85 kg) (v)

v = (125 kg m/s) / (85 kg)

v = 1.47 m/s

Given,

The mass of an object is m = 3 kg

Initial temperature, T1 = 400 K

The specific heat of this object is c = 478 J/kg.K

The heat is Q = 13 kJ

Let T2 be the final temperature.

The formula is used to calculate the final temperature.

Thus, the value of the final temperature is

Therefore, the given answer (a) is correct.

Answer:

PE = mgh

Explanation:

m is mass, g is gravitational constant (9.81) and h is height

The velocity–time graph of the Lunar Landing Powered Descent that has a domain of 10 ≤ t ≤ 25, and a range of -2 ≤ v ≤ -40, between the 24th and the 25th seconds gives;

C) The Lander's velocity decreases away from the reference

A velocity time graph is a graph that shows the variation of the velocity of an object with time.

The information with regards to the lunar landing powered descent graph are;

Coordinate points on the graph;

(10, -2); At time t = 10 seconds, the average velocity, v = 0

(10.5, -40); The velocity relative to the starting point changed and decreased from 0 m/s to -40 m/s

(15, -5); The velocity increased from -40 m/s to -5 m/s

(22, -3); The velocity increases from -5 m/s to -3 m/s

(24, -2); The velocity increases from -3 m/s to -2 m/s

(25, -15); The velocity decreases from -2 m/s to -15 m/s

Therefore, taking the reference point as the point where the velocity is zero, 0, we have that between approximately 24 seconds and 25 seconds, the Lander's velocity decreases away from the reference.

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Answer:

C

Explanation:

Use formable metal flashing:

Answer:

stainless steel

Explanation:

Flashing can be made from many different materials, including metal (copper, aluminum, stainless steel, lead, etc.)

The speed of the rod is 20.68 m/s

An electric current arises because a potential difference arises at the ends of the coil when the bar magnet is moved in or out of the coil. The potential difference that arises is called "Induction Electromotive Force (induced emf)".

The magnitude of the induced EMF depends on three factors, namely:

On the question

Stem length, l = 47 cm = 4.7 m

Force field, B = 710 G = 0.0710 T

The potential difference between the ends, ε = 6.9 V

The rod moves in a plane perpendicular to the magnetic field at a certain speed. Due to this movement, an emf is induced. It is given by:

ε = Blv (v is the rod speed)

And then:

v = ε /Bl

v = 6.9/(0.0710 x 4.7)

v = 6.9/ 0.3337

v = 20.68 m/s

So, the speed of the rod is 20.68 m/s

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To raise the automobile with a hydraulic lift, a force of approximately 19,000 N must be applied to the piston.

In a hydraulic lift, the principle of Pascal's law is applied, which states that pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and the walls of its container. By utilizing this principle, a smaller force applied to a smaller piston can generate a larger force on a larger piston.

In this scenario, the force needed to lift the automobile can be calculated using the formula:

\(\frac{F_{1}}{A_{1}} =\frac{F_{2}}{A_{2}}\)

where \(F_{1}\) is the force applied to the piston, \(A_{1}\) is the area of the piston, \(F_{2}\) is the force generated on the larger piston (required to lift the automobile), and \(A_{2}\) is the area of the larger piston.

Given the radius of the shaft (small piston) as 0.08 m and the radius of the piston as 0.01 m, we can calculate the forces applied and generated as follows:

\(A_{1} = \pi (0.08)^2\\A_{2}= \pi (0.01)^2\)

\(\frac{F_{1}}{A_{1}} =\frac{F_{2}}{A_{2}}\)

Simplifying the equation and substituting the values, we can solve for \(F_{2}\):

\(F_{2}=\frac{F_{1}A_{2}}{A_{1}}\)

Plugging in the values, we find:

\(F_{2}=\frac{F_{1} \pi (0.01)^2 }{ \pi (0.08)^2} \\F_{2}= \frac{F_{1}\times 0.0001}{0.0064} \\F_{2}= 0.015625 \times F_{1}\)

Given that the mass of the automobile is 1520 kg and the acceleration due to gravity is \(9.8 \hspace m/s^{2}\), we can equate \(F_{2}\) to the weight of the automobile:

\(F_{2}= mg\\0.015625\times F_{1}= 1520\times 9.8\)

Solving for \(F_{1}\), we find:

\(F_{1}\approx \frac{1520\times 9.8}{0.015624} \\F_{1} \approx 19072 \hspace N\)

Therefore, a force of approximately 19,000 N must be applied to the piston in order to raise the automobile using the hydraulic lift.

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Answer:

the magnitude of the car's acceleration is 0.2333 m/s^2.

Explanation:

To find the magnitude of the car's acceleration, we can use the formula:

a = F/m

where a is the acceleration, F is the net force acting on the car, and m is the mass of the car.

In this problem, F = 10.5 N and m = 45 kg. Substituting these values into the formula, we get:

a = 10.5 N / 45 kg

a = 0.2333 m/s^2

Therefore, the magnitude of the car's acceleration is 0.2333 m/s^2.

Answer:

O Intense rain or an earthquake

Explanation:

Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.

Intense rain or an earthquake can trigger a landslide.

In conclusion, intense rain or an earthquake can trigger a landslide.

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Answer:

1. Vegetable peeler- >tool used to remove the layers of flesh from vegetables and firm fruits

2. Fruit and salad knives->efficiently cut and slice through vegetables and fruits

3. Citrus knife->Citrus and fruit knives are perfect for cutting, slicing, peeling, chopping, and extracting

4. Kitchen knife->used for cutting meat, dicing vegetables, disjointing some cuts, slicing herbs, and chopping nuts and many more

5. Pairing knife->The small but mighty paring knife is used to cut, chop and slice fruits and vegetables

Explanation:

hope it's helpful to you ☺️

Answer:

1. Vegetable peeler -

A kitchen tool used to remove the layers of flesh from vegetables and firm fruits, such as apples, by peeling off thin narrow shavings..

2. Fruit and salad knives -

Made with a serrated blade, the salad knife can be used safely on non-stick surfaces to cut not only vegetables but a wide variety of foods such as fruits, cakes, bars, and breads. It is also referred to as a lettuce knife..

3. Citrus knife -

Citrus knives are perfect for cutting, slicing, peeling, chopping, and extracting..

4. Kitchen knife -

Knives are used for cutting meat, dicing vegetables, disjointing some cuts, slicing herbs, and chopping nuts, but there are a number of different varieties for separate purposes, including carving, slicing and bread knives for specific ingredients..

5. Paring knife -

Small but mighty paring knife is used to cut, chop and slice fruits and vegetables, but they can also be used for a multitude of other kitchen tasks..

Explanation:

Hope it helps you..

Y-your welcome in advance..

(;ŏ﹏ŏ)(ㆁωㆁ)

A promising evidence of a habitat that might support life on the planet Mars is water.

There is evidence supporting the existence of liquid water on Mars from numerous sources. The finding of repeated black streaks on Martian slopes and the presence of hydrated minerals suggest the potential of seasonal or location-specific briny water flows. A necessary component of life as known is liquid water.

Additionally, Mars possesses underground ecosystems that could provide defence against radiation and severe surface conditions. Researchers have found evidence of ancient underground hydrothermal systems as well as beneath ice. These settings might offer consistent conditions for the development of microbial life.  Methane gas has been found in the Martian atmosphere, along with variations over time, and this has led to questions regarding its origin. Both geological and biological processes can result in the production of methane.

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Answer:

Alternative energy is energy sources other than fossil fuels, including renewable sources and nuclear energy. However, nuclear energy is not classified as a renewable energy source, because it is mined from uranium and thorium elements, which cannot be replenished. Hoped this helped!!!

The total momentum before and after is the same.

It is equal to (70x1.4) - (75x1) = 98-75 = 23 Kg m/s north.

"Momentum, product of the mass of a particle and its velocity. "Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.

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