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AC is at a minimum at Q = 300.

To find the optimized value of Q, we have to find the derivative of AC with respect to Q and equate it to zero.So, differentiate the AC equation with respect to

Q.d(AC)/d(Q) = -36000/Q² + 0.4= 0

Thus, -36000/Q² + 0.4 = 0

Solving the above equation for Q, we get

Q² = 36000/0.4Q² = 90000Q = 300 (∵ Q must be positive)

Therefore, the value of Q at which AC is optimized is Q = 300.

Now, we need to check whether it is a minimum or a maximum.

To do that, we need to find the second derivative of AC with respect to

Q.d²(AC)/d(Q²) = 72000/Q³

Thus, d²(AC)/d(Q²) > 0 (∵ Q is positive)

Therefore, AC is at a minimum at Q = 300.

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Answer:

Explanation: 20 thousand

The angle of internal reflection is 43.21 degrees.

When a light ray travels from one medium to another, it bends or refracts. The amount of bending depends on the indices of refraction of the two media and the angle of incidence of the light ray.

The angle of incidence of the light ray in the liquid is 27.0 degrees. Let us call this angle θ1. The index of refraction of the liquid is 1.71. Let us call this index n.

The angle of refraction of the light ray in the air can be found using Snell's law, which states that n1sinθ1 = n2sinθ2, where n1 and n2 are the indices of refraction of the two media, and θ2 is the angle of refraction. Since the air has an index of refraction of approximately 1, we can write the equation as sinθ1 = n sinθ2.

Solving for θ2, we get θ2 = arcsin(sinθ1/n) = arcsin(sin(27.0)/1.71) = 14.36 degrees.

The angle of internal reflection can be found using the equation θr = 90 - θ2, where θr is the angle of internal reflection. Plugging in the value we found for θ2, we get θr = 90 - 14.36 = 75.64 degrees.

However, this is the angle of reflection from the liquid/air surface. To find the angle of internal reflection, we need to consider the reflection that occurs when the light ray exits the liquid and enters the air again. The angle of reflection in this case will be the same as the angle of incidence, which is 27.0 degrees.

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Answer:firt answer corrcect who answerd

Explanation:

Feather, Biscuit, a 1st grader, Elephant is order of  LEAST inertia to MOST inertia.

Inertia is the resistance of an object to any change in motion. Inertia is proportional the mass of the object: in fact, as we experience in common situations, the larger the mass of an object, the more difficult it is to change its motion.

Inertia of an object is its inherited property. It is the measure of its mass. It is clear that the inertia of an object depends directly on its mass. Mass of an object is the amount of matter contained in it. It is same at every location.

Given that in the case four thing Biscuit, Feather, Elephant, a 1st grader out of which Feather, Biscuit, a 1st grader, Elephant is order of  LEAST inertia to MOST inertia.

Feather, Biscuit, a 1st grader, Elephant is order of  LEAST inertia to MOST inertia.

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From the given options let's select the example which shows a conceptual model.

A conceptual model can be said to be a model which shows an abstract representation of any concept which can be visualized or imagined than other models.

It is a model which the designers want users to understand.

From the list, the best option which is an example of a conceptual model is a mental image of gas molecules as tiny balls.

Let's say, for example, you imagine or have a mental picture of gas molecules using your imagination, it helps to understand how a vacuum system works and you can easily solve the problem if something goes wrong.

Therefore, the example of a conceptual model is:

A mental image of gas molecules as tiny balls.

• ANSWER:

A. mental image of gas molecules as tiny balls

When the period of an orbit varies with regard to the eccentricity, it indicates that the period is reliant on the eccentricity and that the period will vary as the eccentricity changes.

The period of an object in orbit around another object is the time it takes for the object to complete one full orbit. The period depends on several factors, including the distance between the two objects and the eccentricity of the orbit.

In general, the period of an orbit is longer for orbits with higher eccentricity. This is because an orbit with higher eccentricity spends more time at its furthest distance from the central object, and therefore has a longer distance to travel to complete one full orbit.

The relationship between the period and eccentricity of an orbit is described by Kepler's laws of planetary motion. Kepler's third law states that the square of the period of an orbit is proportional to the cube of the semi-major axis of the orbit. Since the semi-major axis of an elliptical orbit depends on the eccentricity, this means that the period also depends on the eccentricity.

Specifically, the period of an elliptical orbit increases as the eccentricity of the orbit increases. This means that a change in the eccentricity of an orbit will result in a corresponding change in the period of the orbit. If the eccentricity of an orbit increases, the period will increase, and if the eccentricity of an orbit decreases, the period will decrease.

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The correct arrangement of light at different wavelengths, in order from smallest to largest frequency, is as follows: gamma rays, X-rays, ultraviolet (UV) rays, visible light, infrared (IR) radiation, microwaves, and radio waves.

Gamma rays have the shortest wavelengths and highest frequencies among the electromagnetic spectrum. They are produced by nuclear reactions and radioactive decay processes. X-rays have slightly longer wavelengths and lower frequencies than gamma rays, and they are commonly used in medical imaging.

Ultraviolet (UV) rays have even longer wavelengths and lower frequencies than X-rays. They are present in sunlight and are responsible for causing sunburn and skin damage.

Visible light, comprising the colors of the rainbow, has longer wavelengths and lower frequencies compared to UV rays. It is the part of the spectrum that is detectable by the human eye.

Infrared (IR) radiation has longer wavelengths and lower frequencies than visible light. It is commonly used for heat detection and remote controls.

Microwaves have even longer wavelengths and lower frequencies than infrared radiation. They are used for communication and cooking.

Finally, radio waves have the longest wavelengths and lowest frequencies among the electromagnetic spectrum. They are used for broadcasting radio and television signals, as well as for telecommunications.

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Explanation:

Answer:

Electricity is the presence and flow of electric charge. Using electricity we can transfer energy in ways that allow us to do simple chores . it's best - known form is the flow of electrons through conductor such as copper wires. The world "electricity " is sometimes used to mean "electrical energy "

Explanation:

hope it is helpful to you ☆

\(kavya\)

Answer:

That's ezy

Explanation:

so you add sponge and Bob so then. you go to earth to get milk because your dad didn't came back you you add Spider-Man so you can get taco bell but that's when you don't find the earth but SpongeBob can drink water

so that how I got 25

Answer:

The pressure of the box on the floor is 200 Pa

Explanation:

Given,

Length of the box=0.5m

Width of the box= 0.1m

∴Area of the box, A= (0.5 X 0.1) sq.m

                                = 0.05 sq.m

We know,

Pressure, P= F/A

                  = 10/0.05 Pa

                  = 200 Pa

∴The pressure of the box on the floor is 200 Pa

Answer:

m= 0. 113 kg

W = 1.1074 N

g = 9.8 m/ s²

m= 870 kg

W = 8526 N

g = 9.8 m/s²

a) weight on earth:

weight = mass × acceleration due to gravity (g)

g on earth = 9.8 m/s²

W = 75 × 9.8

W = 735 N

b) g on Mars

285 = 75 × g

g = 285/ 75

g = 3.8 m/ s²

The third quartile is 183.72 minutes. So, the answer is 183.72 minutes.

Given: The typical college freshman spends an average of =150 minutes per day, with a standard deviation of =50 minutes, on social media and the third quartile is 0.75.

Therefore, we can determine the answer as follows:

We know that the third quartile, denoted by Q3, is the value such that 75% of the data lies below it. So, z-score corresponding to the third quartile is given by:

z = invNorm(0.75)

Where, invNorm is the inverse Normal distribution function.

By definition, the inverse Normal distribution gives the z-score given the area under the Normal distribution curve. Here, we need to find the area corresponding to the upper tail of 0.25 (since 75% of the data lies below the third quartile). This can be calculated as follows:

Area to the left of Q3 = 1 - Area to the right of Q3= 1 - 0.25 = 0.75

Therefore, the z-score corresponding to this area is given by:

z = invNorm(0.75) = 0.6745

Now, the value of the third quartile can be obtained by using the z-score formula as follows:

z = (X - μ) / σ

where, X = value of the third quartile, μ = population mean = 150 (given), σ = population standard deviation = 50 (given)

Substituting the values, we get:

0.6745 = (X - 150) / 50

Solving for X, we get: X = 150 + 0.6745 * 50X = 183.72

Therefore, the third quartile is 183.72 minutes. So, the answer is 183.72 minutes.

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Answer:

D-A radiator emitting warm air and drawing in cool air

Explanation:

Answer:

a= (2.3 m/s) / (3.0s) = 0.77 m/s2F= ma20.0 N = m (0.77 m/s2)m = 26 kgForce is measured with?Newtons (N) --> 1 N = 1 kg m/s2

Explanation:

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The weight of the person on the earth and moon are 588 N and 96 N respectively.

Mass of the person, m = 60 kg

The weight of an object is defined as the force that causes the Earth to pull masses and objects towards its centre, called gravity.

a) Acceleration due to gravity on the earth,

g = 9.8 N/kg

Therefore, weight of the person on the earth,

W = mg

W = 60 x 9.8

W = 588 N

b) Acceleration due to gravity on the moon,

g' = 1.6 N/kg

Therefore, weight of the person on the moon,

W' = mg'

W' = 60 x 1.6

W' = 96 N

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After 1 hour, 80 g decays to 40 g.

After another hour (total 2 hours), 40 g decays to 20 g.

After another hour (total 3), 20 g decays to 10 g.

After one more hour (total 4), 10 g decays to (D) 5 g.

The net force acting on the airplane is 25N.

Forces acting on the paper airplane when it is in the air:

Given.

Weight of the paper airplane, F1 = 16N

The force of air resistance, F2 = 9N

Net force = F1 + F2

Net force = 25N

Thus, the net force acting on the airplane is 25N.

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A broad source of light of a wavelength of approximately 250 bright fringes will appear over the 130.0 mm distance.

To determine the number of bright fringes that appear over the 130.0 mm distance, we can use the formula:

Number of fringes = (2d / λ) + 1

where d is the separation between the plates and λ is the wavelength of light.

In this case, the separation between the plates is equal to the diameter of the wire, which is 40.0 microns (or 40.0 x 10^-6 meters).

The wavelength of light is given as 321.0 nm (or 321.0 x 10^-9 meters).

Substituting these values into the formula, we get:

Number of fringes = (2 * 40.0 x 10^-6 m) / (321.0 x 10^-9 m) + 1

Number of fringes = 249.22 + 1

Number of fringes ≈ 250

Therefore, approximately 250 bright fringes will appear over the 130.0 mm distance.

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Answer:

F = 600N

Explanation:

F = m x a

F = Force

m = mass

a = acceleration

F = 0.14 x 600 = 84N

Mechanical waves can be classified as either transverse or longitudinal waves depending on the sort of motion they undergo. It should be noted that longitudinal and transverse waves can both be periodic.

The disruption of a transverse wave propagates perpendicular to the direction of propagation. Similar to sound waves, ocean waves also transport energy from one location to another. Through a medium, such as water or air, this energy moves. Additionally, this energy travels in a transverse wave, which is a repeating up-and-down motion. Echolocation is the process of using sound waves and their echoes to locate things in space. In the dark, bats use echolocation to navigate and locate food.

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Answer:

The soprano's singing matched the natural frequency of the glass, causing it to vibrate. The strong vibrations caused the glass to shatter.

Explanation:

edg 2020

Answer:

\(E=1.62\times 10^{14}\ J\)

Explanation:

Given that,

The mass of the paperclip, m = 1.8 g = 0.0018 kg

We need to find the energy obtained. The relation between mass and energy is given by :

\(E=mc^2\)

Where

c is the speed of light

So,

\(E=0.0018\times (3\times 10^8)^2\\\\E=1.62\times 10^{14}\ J\)

So, the energy obtained is \(1.62\times 10^{14}\ J\).

First, let's calculate the particle acceleration, using the formula below:

Now, to find the force applied, let's use the second law of Newton:

Therefore the value of F is 0.08 N.

Answer:

Enzymes

Explanation:

Enzymes are biological catalysts, which regulate various chemical reactions in the body.

The biochemical reactions involved in the digestion of food are regulated by enzymes. These biochemical reaction converts food into nutrients that are useful to the body.

For instance, the enzyme amylase catalyses the hydrolysis of starch into sugars.

Answer:

h = 200 m

Explanation:

The energy content of the chocolate is completely converted to the potential energy of the climber. Therefore:

\(Energy\ of\ Chocolate = Potential\ Energy\\Energy\ of\ Chocolate = mgh\)

where,

m = mass of climber = 50 kg

Energy of Chocolate = 100 KJ = 100000 J

g = acceleration due to gravity = 10 m/s²

h = height = ?

Therefore,

\(100000\ J = (50\ kg)(10\ m/s^2)h\\\\h = \frac{100000\ J}{500\ N}\)

h = 200 m

Answer:

8 m/s²

Explanation:

Given,

Force ( F ) = 4 N

Mass ( m ) = 0.5 kg

To find : -

Acceleration ( a ) = ?

Formula : -

F = ma

a = F / m

= 4 / 0.5

= 40 / 5

a = 8 m/s²

It's acceleration is 8 m/s².

Answer:

1.Your friend says "no thanks" to the dinner your dad cooked and prefers to just hang out with friends instead.

2. Your teammates keep making fun of you for spending so much time studying for Friday's math test.

3. Your coworkers spend every weekend watching movies at Tim's house and invite you to join them.

4. Your friends all sign up for a free class at the gym and suggest you sign up for it, too.

The sequence of energy conversions that occur in a wind turbine can be identified as follows: Kinetic Energy -> Mechanical Energy -> Electric Energy

The kinetic energy of the wind is converted into mechanical energy as the blades of wind turbine turn.

Mechanical energy of the spinning blades is then converted into electrical energy by generator that is connected to the turbine.

And then finally,  electrical energy produced by the generator is transmitted to power grid or to a battery for storage and later use.

So, the sequence of energy conversions in a wind turbine is from kinetic energy to mechanical energy to electrical energy.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: Wind energy is increasingly relied upon to help meet global energy needs. Wind energy can be used to generate electricity using wind turbines. What correctly identifies the sequence of energy conversions that occur in a wind turbine?

Kinetic Energy -> Mechanical Energy -> Electric Energy

Mechanical Energy -> Kinetic Energy -> Electric Energy

Kinetic Energy ->Electric Energy ->  Mechanical  Energy