a solenoid 24.0 cm long and with a cross-sectional area of 0.540 cm2 contains 460 turns of wire and carries a current of 90 A. Calculate: (a) the magnetic field in the solenoid; (b) the energy density in the magnetic field if the solenoid is filled with air; (c) the total energy contained in the coil’s magnetic field (assume the field is uniform); (d) the inductance of the solenoid

Answer:

neutralization

Explanation:

this is because

acid + base ---> salt + water

The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO₂ and water is equal to the energy required to break the bonds of sugar and oxygen. So, option A.

Through a sequence of chemical processes called cellular respiration, glucose is broken down to create ATP, which may then be used as an energy source for a variety of bodily functions. The citric acid cycle, oxidative phosphorylation, and glycolysis are the three primary phases of cellular respiration.

Carbon dioxide and water are created during cellular respiration when glucose is broken down in the presence of oxygen. The energy-carrying molecule ATP (adenosine triphosphate) absorbs the energy generated during the process.

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Answer:

true

Explanation:

for example assume you are setting in a moving bus and when someone see you from the ground you are in motion but for some who is with you in the bus you are not in motion.

freezing

During freezing, the temperature of a substance remains constant while the particles in the liquid form a crystalline solid. Because particles in a liquid have more energy than particles in a solid, energy is released during freezing. This energy is released into the surroundings.

With the sound waves in phase at 688 hz and the speed of sound in air to be 344 m/s we have a wavelength of 0.5 m

To solve this problem the formula and the procedure that we have to use is:

λ = v / f

Where:

Information about the problem:

Using the wavelength formula and replacing values we get:

λ = v / f

λ = 344 m/s / 688 Hz

λ =0.5 m

It is the quantity that measures the number of times or cycles in which a wave is repeated over time in seconds. Frequency is expressed in Hertz (Hz).

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Assuming the surface is frictionless, the energy lost to friction would be 0 Joules.

Friction is the force that resists motion between two objects that are in contact with each other. In the experiment, friction is the force that resists the motion of the second spring as it compresses a distance of d2/2. Since the surface is rough, it provides a strong resistance to the motion of the spring, thus leading to a loss of energy.

However, if the surface had been frictionless, then the second spring would have compressed a distance of d2, as there would be no resistance to its motion. This means that no energy would have been lost to friction, as there would not have been any friction present in the system.

In conclusion, friction is the force that is responsible for the loss of energy in this experiment. When the surface is rough, the friction between the surface and the second spring is strong, leading to a loss of energy. However, when the surface is frictionless, the friction between the surface and the second spring is not present, thus no energy is lost to friction.

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Answer:

The concave lens is the answer.

The wind turbine with a blade diameter of 25 m and an average wind velocity of 6 m/s has an average electric power output of 172.34 kW. For an annual operating time of 8000 hours, the turbine will produce approximately 1,378,720 kWh of electricity.

If sold at a price of $0.09/kWh, the revenue generated from the electricity produced by the turbine would be approximately $124,086.72. To calculate the average electric power output, we can use the formula:

\(\[P = \frac{1}{2} \times \text{{density of air}} \times A \times v^3 \times \text{{efficiency}}\]\)

Substituting the given values into the formula, we can calculate the average electric power output:

\(\[P = \frac{1}{2} \times 1.3 \, \text{{kg/m}}^3 \times \left(\frac{\pi}{4} \times (25 \, \text{{m}})^2\right) \times (6 \, \text{{m/s}})^3 \times 0.34 \approx 172340 \, \text{{watts}} \approx 172.34 \, \text{{kW}}\]\)

To determine the amount of electricity produced for an annual operating time of 8000 hours, we multiply the average electric power output by the operating time:

\(\[\text{{Electricity produced}} = P \times \text{{operating time}} = 172.34 \, \text{{kW}} \times 8000 \, \text{{h}} = 1,378,720 \, \text{{kWh}}\]\)

Finally, to calculate the revenue generated, we multiply the electricity produced by the selling price per kilowatt-hour:

\(\[\text{{Revenue}} = \text{{Electricity produced}} \times \text{{price per kWh}} = 1,378,720 \, \text{{kWh}} \times \$0.09/\text{{kWh}} \approx \$124,086.72\]\)

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Answer:

Check Explanation

The fission reactions include

239 Pu + n → Ce + Kr + 2n

And

295 Am + in → 154 La + 95 Sr + 3 n

Explanation:

A fission reaction is a radioactive reaction in which an atom with a heavy nuclei splits into atoms with smaller or lighter nuclei usually brought about by the attack of a fundamental particle and accompanied by the release of some fundamental particles (neutrons mostly) and energy.

Although, the reactions to be examined aren't totally clear, we can still guess which element is which and know which of the reactions has a heavier nuclei splitting into smaller ones.

1) H + H → He + 2n

Two hydrogen atoms combine to give an helium atom and release neutrons too, showing that here, smaller molecules combine to form a bigger one. Hence, this isn't a fission reaction, rather, it's a fusion reaction.

2) 239 Pu + n → Ce + Kr + 2n

Here, Pu (Plutonium, atomic mass 239), a heavy nuclei that splits into smaller nuclei, Ce (Cerium, atomic mass 140) and Kr (Krypton, atomic mass 84) together with some neutrons to fit the definition of a fission reaction. Hence, this reaction is a fission reaction.

3) 295 Am + n → 154 La + 95 Sr + 3 n

Here, Pu (Americium, atomic mass 295), a heavy nuclei that splits into smaller nuclei, Ce (Lamthanium, atomic mass 154) and Sr (Strontium, atomic mass 95) together with some neutrons to fit the definition of a fission reaction. Hence, this reaction is a fission reaction.

4) 13C + H → 14N

Carbon 13 combines with a hydrogen element to mutate and give nitrogen-14, a heavier nuclei, showing all signs of a nuclear fission and not fission.

Hope this Helps!!!

Answer:

b and c

Explanation:

got it correct on edg

Answer:

Sharpening a knife reduces it's height as a wedge thus giving it more efficiency.

Explanation:

Mechanical advantage refers to the degree or quantity to which a force is increased or amplified by using a tool or a machine.

Mechanical Advantage can be calculated as follows:

Lenght of Incline (LI) / Height of Incline (HI)

Assume I have constructed a hedge with an inclination that run 10 meters from point x to point y (which is the back of a truck. Point y to the floor is 5 meters.

If   LI = 10m and

HI= 5m

The mechanical advantage is given as 10/5 = 2

The angle of incline is also called the effort distance. From our calculations above, by sacrificing horizontal movement, I reduced the amount of effort it would have cost to lift up that object from ground up -  a distance of 5 meters.

Think of a knife as a form of a similar wedge.

The more a knife is sharpening of a knife further reduces its angle of elevation. Thats why it becomes more efficient to use, hence our mechanical advantage.

Cheers

Since Alejandro hopes to combine the findings from the collected studies and draw a general conclusion regarding the subject, he is using statistical tool of inference.

There are basically 2 types of statistical tools:

Descriptive tools are used to describe data. They include the use of tables, graphs, measures of dispersion, measures of central tendencies, etc.

Inferential tools are used to deduce conclusions from data. They include measures of significant differences, probability, correlation and regression, etc.

In this case, Alejandro would need to subject the data collected from the 35 studies to inferential statistical analysis tools in order to be able to make relevant conclusions.

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Answer:

Kitchen B

Explanation:

This all boils Down to the phenomenon of convection current of àir where warmer air rises up and is replaced by cooler air, the fan is placed higher up in B and because hot air rises higher up it will remove more hot air here

Answer:

Distance = 0.0052 m

Explanation:

Work =1.56J

Force = 300N

Distance = ?

Work=Force*Distance

1.56 J = 300N * Distance

1.56/300 = Distance

0.0052 m = Distance

Answer:

125 meters

Explanation:

we know that

v × t = d

v = 25

t = 5

so the distance should be 5 × 25

answer is 125 meters

Answer:

शब्द प्रयोग गर्छौं ।

The difference, though, lies in the hydrogen atoms. In heavy water, each hydrogen atom is indeed heavier, with a neutron as well as a proton in its nucleus. This isotope of hydrogen is called deuterium, and heavy water's more scientific name is deuterium oxide.

Grams to moles conversion is a common calculation in chemistry that allows you to convert a given mass of a substance, expressed in grams, to its corresponding amount of moles.

The formula for converting grams to moles is:

moles = grams / molar mass

Moles are useful in chemical calculations as they allow for the conversion between the mass of a substance and the number of particles it contains. For example, if you know the number of moles of a substance and its molar mass, you can calculate the mass of the substance.

Moles are also important in the concept of stoichiometry, which involves calculating the amounts of reactants and products in a chemical reaction. By using the mole ratio of reactants and products, it is possible to determine the theoretical yield of a reaction and compare it to the actual yield.This number is known as Avogadro's number and is equal to 6.022 x 10^23 particles.

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The frequency domain graph of the periodic composite signal consists of two peaks, one at 100 Hz with an amplitude of 20 V and another at an unknown frequency with an amplitude of 5 V.

In the frequency domain, the composite signal can be represented by a graph showing the amplitude of each frequency component present in the signal. In this case, the signal is composed of two sine waves. The first sine wave has a frequency of 100 Hz and a maximum amplitude of 20 V. This means that in the frequency domain graph, there will be a peak at 100 Hz with an amplitude of 20 V.

The second sine wave's frequency is not given, but we know that it has a maximum amplitude of 5 V. Therefore, there will be another peak in the frequency domain graph at an unknown frequency with an amplitude of 5 V.

Since the bandwidth of the composite signal is 2000 Hz, the frequency domain graph will span a range of frequencies from 0 Hz to 2000 Hz. Apart from the two peaks mentioned above, there will be no other significant frequency components in the graph.

To summarize, the frequency domain graph of the periodic composite signal will have two peaks—one at 100 Hz with an amplitude of 20 V, and another at an unknown frequency with an amplitude of 5 V.

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Answer: 35

Explanation:

Given the following :

M = 0.5 kg

Power of heater = 100W

From the graph ;

Time (t) = 7seconds

Change in temperature(Dt) = t2 - t1

Where t2 = 70°C, t1 = 30°C

Dt = (70 - 30)°C = 40°C

Recall Q = iVt

IV = power

Q = mcDt

c = specific heat capacity of liquid

mcDt = ivt

mcDt = power × t

0.5 × c × 40°C = 100 × 7

20°C × c = 700 J

c = 700 J/ 20°C

c = 35 J / kg°C

Answer:

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

Explanation:

hope this helps a little bit sorry if i got it wrong

Average acceleration of the bullet through the board = 640 m/s²Total time that the bullet is in contact with the board = 0.75 sMinimum thickness that the board should have in order to bring the bullet to stop = 5.2 cm

To find the average acceleration of the bullet through the board, we can use the formula:

acceleration = (final velocity - initial velocity) / time

Given that the initial velocity (u) is 120 m/s and the final velocity (v) is 280 m/s, we need to determine the time it takes for the bullet to pass through the board.

To calculate the time, we can use the equation:

distance = velocity × time

The distance the bullet travels through the board is the sum of the thickness of the board on the entry side and the exit side, which is 10 cm + 10 cm = 20 cm = 0.2 m.

So, the time (t) is:

0.2 m = (120 m/s + 280 m/s) / 2 × t

0.2 m = 400 m/s / 2 × t

0.2 m = 200 m/s × t

Solving for t:

t = 0.2 m / 200 m/s = 0.001 s

Now, we can calculate the average acceleration:

acceleration = (280 m/s - 120 m/s) / 0.001 s = 160,000 m/s²

To find the total time that the bullet is in contact with the board, we know that the bullet travels through the board in 0.001 s, as calculated above.

Lastly, to determine the minimum thickness that the board should have to bring the bullet to a stop, we need to consider the deceleration (negative acceleration) experienced by the bullet within the board. The time of contact is the same as calculated earlier, i.e., 0.001 s. Using the formula:

acceleration = (final velocity - initial velocity) / time

We can rearrange the formula to solve for the minimum thickness (distance):

distance = (initial velocity + final velocity) / 2 × time

Plugging in the values:

distance = (120 m/s + 0 m/s) / 2 × 0.001 s = 0.06 m

Therefore, the minimum thickness that the board should have to bring the bullet to a stop is 0.06 meters.

Now, we need to calculate the time taken by the bullet to stop. We know that: Distance covered by the bullet in the board (d) = Thickness of the board (t)Substituting the given values, we get: d = tWe also know that: Distance covered by the bullet (s) = (Initial velocity of the bullet (u)² - Final velocity of the bullet (v)²) / 2 × Acceleration of the bullet (a)Substituting the given values, we get:3 / 100 m = (120² - 0²) / 2 × (-120 / t)Simplifying the above equation, we get:t² = 3 × 120² / 100t = 5.2 sTherefore, the time taken by the bullet to stop is 5.2 s.Now, substituting the value of t in the relation of thickness, we get:Thickness of the board (d) = t = 5.2 cmTherefore, the minimum thickness that the board should have in order to bring the bullet to stop is 5.2 cm.

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A weight-lifter strains to lift a heavy weight and there is no such movement of the person's arms holding on to the weight. This type of contraction is known as isometric.

In science and engineering, the weight of an object is the force appearing on the item due to gravity. some general textbooks define weight as a vector amount, the gravitational force performed at the object. Others outline weight as a scalar quantity, the importance of the gravitational pressure.

The word weight denotes an amount of the equal nature as a pressure: a load of a frame is fabricated from its mass and the acceleration due to gravity."

We regularly use the words 'mass' and 'weight' interchangeably, however, they suggest quite different things. Your mass is equal regardless of in which you go within the universe; your weight, alternatively, adjustments from place to region.

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Answer:derp

Explanation:

Normal stress is 31.83 MPa, and shear stress is 22.58 MPa at the seam.

The cylindrical pressure vessel is subjected to an internal pressure of 8 MPa. The inner radius of the cylindrical pressure vessel is 1.25 m, and the wall thickness is 16 mm. The vessel is constructed from steel plates welded along the 45° seam.

The formula for determining the normal and shear stress components at the seam of the cylindrical pressure vessel is σn = pi * Ri^2 * P / (t * K) + pi^2 * E * t^2 / (8 * K^3)σs = pi * Ri^2 * P / (2 * t * K) where σn: normal stress σs: shear stress Ri: inner radius of the vessel lP: internal pressure t: wall thickness K: factor related to the vessel's shape E: modulus of elasticity. For the given values,σn = 31.83 MPaσs = 22.58 MPa. Therefore, normal stress is 31.83 MPa, and shear stress is 22.58 MPa at the seam.

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Average speed is s_avg = v_avg = 0.068 m/s; and magnitude of average velocity is v_avg = 2.15 m / 31.6 s = 0.068 m/s.

To find the gnat's average speed and average velocity, we first need to find the magnitude of the velocity. The average velocity is defined as the total distance traveled divided by the total time spent traveling. In this case, the total distance is 2.15 m, and the total time is 31.6 s.

Magnitude of average velocity:

v_avg = 2.15 m / 31.6 s = 0.068 m/s

The average speed is defined as the total distance traveled divided by the total time spent traveling, regardless of direction. In this case, since the gnat traveled from one end of the pencil to the other, its average speed will be equal to its average velocity, since velocity takes into account direction.

Average speed:

s_avg = v_avg = 0.068 m/s

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Experiments allow physicists today to reproduce (on very small scales) energy and temperature conditions thought to have prevailed in the early universe as far back in time as about one trillionth of a second after the Big Bang.

The study of the early universe is known as cosmology, and physicists use a variety of tools to probe the conditions that existed during its formation. One of the most important of these tools is the Large Hadron Collider (LHC) at CERN, which is capable of producing particle collisions at energies that were last seen in the universe just after the Big Bang. By studying the behavior of particles in these collisions, physicists hope to gain insights into the fundamental forces and particles that govern the universe at its most basic level. Through these experiments, physicists can test theories about the early universe and better understand the nature of the cosmos.

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Answer:

i) b. 14.3 Hz

ii) d. 0.4625 m/s

Explanation:

f = c / λ

f = frequency

c = speed

λ = wavelength

first question:

the given values,

λ = 2.17 m

c = 31 m/s

f = c / λ

f = 31 / 2.17

f = 14.28

∴ f = 14.3 Hz

second question:

given,

λ = 0.25 m

f = 1.85 Hz

f = c / λ

rearranging,

c = f × λ

c = 1.85 × 0.25

c = 0.4625

∴ c = 0.4625 m/s

(love your username, btw.)

Brandon has 34.36 seconds to get to the point on the other side of the river.

The Upstream method to save ones stick glide would be to ensure that the controller is not passively exposed to anything that is likely floating in the air. Furthermore, we advise against snacking while gaming. While this may be tempting, you may end up with bits of meals stuck to ones control.

Calculation:-

⇒     Wide of river = 50 m

⇒    Downstream length = 200 m

⇒     Drift distance = √50² + 200²

⇒                   = √2500 + 40000

⇒                      = √ 42500

⇒               = 206.16 D.

⇒       Vmr  = 4 + 2

⇒               = 6 ms⁻¹

⇒ t minimum =  d/Vmr

⇒               = 206.16/6

⇒               = 34.36 sec.

Therefore, the minimum amount of time Brandon can take to reach the point on the opposite side of the river is 34.36 seconds.

The concepts of minimum time problems are used in a variety of fields, including physics, engineering, and optimization. By understanding how to solve these types of problems, we can design and optimize systems and processes to achieve desired outcomes in the most efficient way possible.

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Answer:

This rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age. By 2000 the population counted 6 billion heads, however, population growth (doubling time) started to decline after 1965 because of decreasing birth rates.

Explanation:

The main cause of human population growth is increased well-being.

Well-being is a term to refer to the state of satisfaction of economic, social, labor, psychological, biological needs, among others of the human.

Therefore, when civilizations and societies became more complex, many issues such as health, food, hygiene, education, government, among others, improved, giving more well-being to their inhabitants.

Well-being has evolved with society and today people have access to many things, services, and goods that give them well-being, improving their quality and life expectancy. Therefore, the correct answer is well-being.

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Answer:

Jesus

Explanation:

he is the way

The average speed of the car is 35.6m/s

The average speed is the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is represented by the magnitude and does not have direction. It is measured in meter per second

Therefore average speed = total distance / total time taken

The total distance here is 500+ 500= 1000km = 1×10⁶m

the time taken for the first journey = 500×1000/35= 14285.71 seconds

the time taken for traveling back = 500000/43= 11627.91 seconds

total time taken = 14285.71 + 11627.91 = 25913.62seconds

therefore average speed = 1000000/25913.62

= 35.6m/s

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