The two Keck 10-meter telescopes, separated by a distance of 85 meters, can operate as an optical interferometer. What is the Keck interferometer's resolution when it observes in the infrared at a wavelength of 2 microns

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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The correct option is D. λfilm/4, is wavelength the film thickness to produce the destructive interference of light.

Constructive interference occurs when two waves interact in a way that might combine to create a larger wave.

Therefore, the film thickness needs to be increased by λfilm/4 in order to be able to offer a destructive interference.

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The moment of inertia of the cylinder about the horizontal axis parallel and tangent to the cylinder is 3MR²/2.

The moment of inertia (Icm) of the cylinder about its symmetrical axis is calculated using the formula MR^2/2, where M represents the mass of the cylinder and R represents its radius.

To find the moment of inertia of the cylinder about the axis parallel and tangent to the cylinder, we can use the parallel axis theorem. According to the parallel axis theorem, the moment of inertia about an axis parallel to and at a distance 'd' from the axis passing through the center of mass is given by:

I = Icm + Md^2

In this case, the axis of rotation is parallel and tangent to the cylinder, so the distance 'd' from the axis passing through the center of mass is equal to the radius 'R'. Substituting the values into the equation:

I = Icm + MR^2

I = MR^2/2 + MR^2

I = (1/2 + 1)MR^2

I = (3/2)MR^2

Therefore, the moment of inertia of the cylinder about the given axis is (3/2)MR^2.

The correct answer is (D) 3MR^2/2.

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Answer:

vestigial structure

Homologous structure

Explanation:

Did the assignment.

Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a vestigial structure.

A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a Homologous structure.

Some organisms have elements that seem to be left over from an earlier ancestor but have no apparent purpose. For instance, because they are evolved from reptiles with legs, certain snakes have pelvic bones despite not having any. The human vermiform appendix is another instance of a structure that serves no purpose.

Vestigial structures are these inactive, purposeless structures. Other examples of vestigial structures are the wings of flightless animals like the ostrich, the leaves of some cacti, the remains of whale pelvic bones, and the eyes that are blind in cave mammals.

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The maximum deceleration of the car is 10.5 m/\(s^{2}\) approximately. While the stopping distance is 9.3 m

Stopping force is the force required to stop the object in motion. Stopping force is tantamount to frictional force.

Given that a brother approaches a stop sign at a velocity of 14 m/s [E] as the light turns amber, He applies the brakes to get the maximum stopping force while avoiding skidding. The car has a mass of 1500 kg, and the coefficient of friction between the tires and the road is 1.07. Ignoring your brother's reaction time.

The given parameters are;

The normal reaction N = mg

N = 1500 x 9.8

N = 14700 N

The stopping force = μN = ma

1.07 x 14700 = 1500a

15729 = 1500a

a = 15729/1500

a = 10.486 m/\(s^{2}\)

From 3rd equation of motion

\(V^{2}\) = \(U^{2}\) + 2aS

where U = 0

\(14^{2}\) = 2 x 10.486 x S

196 = 20.972S

S = 196/20.972

S = 9.3 m

Therefore, the maximum deceleration of the car is 10.5 m/\(s^{2}\) approximately. While the stopping distance is 9.3 m

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To cancel the polarization of a NaLi molecule, an electric field of magnitude 5.33 V/Å needs to be applied along the molecular axis in the direction opposite to the polarization.

To double the polarization of a NaLi molecule, an electric field of magnitude 10.66 V/Å needs to be applied along the molecular axis in the direction of the polarization.

The polarization of a NaLi molecule is due to the difference in electronegativity between sodium and lithium. Sodium is more electropositive than lithium, which means that it has a stronger affinity for electrons.

This means that the electrons in the NaLi molecule are more likely to be found closer to the sodium atom than the lithium atom.

The electric field will exert a force on the electrons in the NaLi molecule, trying to pull them away from the sodium atom and towards the lithium atom. If the electric field is strong enough, it will be able to cancel the polarization of the molecule.

The magnitude of the electric field needed to cancel the polarization of a NaLi molecule can be calculated using the following formula:

E = 2qd / e

where:

E is the magnitude of the electric field

q is the charge of an electron

d is the inter-atomic distance

e is the permittivity of free space

In this case, the magnitude of the electric field needed to cancel the polarization of a NaLi molecule is:

E = 2 * (1.602 * 10^-19 C) * (3.0 * 10^-10 m) / (8.854 * 10^-12 C^2 / N m^2) = 5.33 V/Å

To double the polarization of a NaLi molecule, the electric field would need to be twice as strong. This means that the magnitude of the electric field would need to be 10.66 V/Å.

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The work done by the applied force is 21.23 J.

The work done by the gravity is 29.4 J.

The magnitude of the normal force between the block and the wall is 9.8 N.

The work done on the block include the following;

where;

The applied force on the block is calculated as follows;

Fsinθ - μmgsin(90) = ma

at a constant velocity, the acceleration of the block = 0

Fsinθ - μmg = 0

Fsinθ = μmgsinθ

F =  μmg/sinθ

F = (0.4 x 1 x 9.8)/sin(29)

F = 8.09 N

The work done by the applied force is calculated as;

W = Fcosθ x d

W = (8.09 x cos29) x 3

W = 21.23 J

The work done by the gravity is calculated as follows;

W = Fn cosθ x d

where;

W = mg cosθ x d

W = 1 x 9.8 x cos(0) x 3

W = 29.4 J

The magnitude of the normal force between the block and the wall is calculated as follows;

Fn = mg cosθ

where;

Fn = 1 x 9.8 x cos(0)

Fn = 9.8 N

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Answer:

c

Explanation:u

to find the modulus of elasticity MoE at 23% of moisture content based on the already given modulus of elasticity of 12% moisture content we need to consider a shrinkage behavior of material. the expected MoE comes out to be approximately \(6,836 N/mm².\)

given information:

Modulus of elasticity at 12% moisture content =7,920 N/mm²

resultant shrinkage or final shrinkage percentage FSP = 30%

To calculate the expected MoE at 23% moisture content we have the following equation:

MoE-23% =   \(MoE-12%\) \((1 - FSP (23 - 12) / (100 - 12))\)

MoE-23% = \(7,920 N/mm² × (1 - 0.30 × (23 - 12) / (100 - 12))\)

MoE-23% =\(7,920 N/mm² × (1 - 0.30 × 11 / 88)\)

MoE-23% = \(7,920 N/mm² × (1 - 0.1364)\)

MoE-23% = \(7,920 N/mm² × 0.8636\)

MoE-23% =  \(6,836 N/mm²\)

therefore the expected modulus of elasticity at 23% moisture content comes out to be approx \(6,836 N/mm²\).

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Visible light fits between UV and infrared in the electromagnetic spectrum.

Visible light is a form of electromagnetic radiation that falls within a specific range of wavelengths in the electromagnetic spectrum. The electromagnetic spectrum is divided into various regions based on wavelength and frequency.

The regions adjacent to visible light are ultraviolet (UV) and infrared. Ultraviolet radiation has shorter wavelengths and higher frequencies than visible light, while infrared radiation has longer wavelengths and lower frequencies.

Microwaves and radio waves have longer wavelengths and lower frequencies than infrared, placing them further away from visible light on the electromagnetic spectrum.

X-rays and gamma rays have much shorter wavelengths and higher frequencies than ultraviolet radiation, placing them further away from visible light on the electromagnetic spectrum.

Therefore, visible light fits between UV and infrared in the electromagnetic spectrum.

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The slit separation is 55.1 μm, which is approximately equal to 220 μm (since 1 μm = 10⁻⁶ m).

The distance between the central maximum and the first bright fringe on either side in a double-slit interference pattern can be calculated using the formula:

y = (λL) / d

where y is the distance between the central maximum and the first bright fringe, λ is the wavelength of the light, L is the distance between the slits and the screen, and d is the slit separation.

In this problem, the distance between the central maximum and the first bright fringe on either side is given as 28.0 mm = 0.0280 m. The wavelength of the light is given as λ = 570 nm = 5.70 × 10⁻⁷ m. The distance between the slits and the screen is given as L = 2.70 m.

Solving for the slit separation d, we get:

d = (λL) / y = (5.70 × 10⁻⁷ m)(2.70 m) / 0.0280 m

d = 5.51 × 10⁻⁵ m = 55.1 μm

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Answer:

It change because its and cold

The single force that will produce equilibrium is: -125 N

We can say that the resultant force is the algebraic sum of all the forces acting on a body.

An object is in equilibrium when the sum of all the forces acting on the body or the resultant force of the system is equal to zero (0).

The general formula for calculating the resultant force on an object and determined if it is in mechanical equilibrium is the following:

Fr = ∑F

Where:

In this case for the resultant force to be (0 N) the single force that will produce equilibrium is:

Fr= 125 N -125 N

Fr= 0 N

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Blue light has a greater frequency and carries more energy than red light when compared.

Electromagnetic frequencies that can be seen by human eyes make up visible light. This spectrum excludes ultraviolet and infrared radiation. The wavelengths and frequencies that an object reflects determine the colours we see. Both waves and particles of light exist. It has wave characteristics like amplitude, period, wavelength, and frequency.

The number of times a wave completes a cycle each second is known as its frequency. Hertz, or cycles per second, is the unit of measurement (Hz).

There is more energy in the light the higher the frequency. As a result, its wavelength shrinks.

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Answer:

B.

I think.

Explanation:

Mars doesn't have that much of an atmosphere!

Have a great day!

Line - A:  (15/10)  =  1.5 inch/second

Line - B:  (0/10)  =  0

Line - C:  (10/10)  =  1.0 inch/second

Line - D:  (-25/20)  =  -1.25 inch/second

Line-A represents the greatest speed.

The work that has been done by the Korbel is  4.41kJ.

We have to note that we define work in physics as the product of the force and the distance. In the case of the chair in the question, we have been told that Korbel pushes a 15 kg chair for a distance of 30 meters.

The force in this case would be the weight of the chair that we have and we can write that;

W = mgh

m = mass

g = acceleration due to gravity

h = height

Thus

W = 15 * 9.8 * 30

W = 4.41kJ

Thus a work of about  4.41kJ is done.

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Jeff has created a device that can convert solar energy into electricity. This innovative technology harnesses the power of sunlight to generate electrical energy, providing a sustainable and renewable source of power.

Jeff's device utilizes photovoltaic cells to convert solar energy into electricity. Photovoltaic cells, commonly known as solar cells, are made of semiconducting materials, such as silicon, that can absorb photons from sunlight.

When sunlight hits the solar cell, it excites electrons within the material, creating an electric current. The photovoltaic cells are arranged in a panel or module, which can be connected in series or parallel to achieve the desired voltage and current levels.

To optimize the conversion of solar energy, Jeff's device may include additional components, such as a charge controller, which regulates the charging of batteries or the direct usage of electricity.

It may also feature an inverter to convert the direct current (DC) produced by the solar cells into alternating current (AC), suitable for powering appliances and feeding into the electrical grid.

Overall, Jeff's device harnesses the photovoltaic effect to transform solar energy into a usable form of electricity, providing a sustainable and renewable energy source.

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The Ac components of the velocity and acceleration when x = 50 ft can be determined if the constant speed is 75 ft/s.

The velocity, v, is the rate of change of the displacement with respect to time, and can be calculated using the following equation:

v = x/t, where x is the displacement and t is the time.

Therefore, when x = 50 ft and thehttps://brainly.com/question/12550364?referrer=searchResultsis 75 ft/s, the velocity v is: v = 50 ft/15 s = 75 ft/s.

The acceleration, a, is the rate of change of velocity with respect to time, and can be calculated using the following equation:

\(a = (v - v_0) / t,\) where v is the velocity, \(v_0\) is the initial velocity, and t is the time.

Since the initial velocity \(v_0\) = 0 and the constant speed is 75 ft/s, when x = 50 ft, the acceleration a is: a = (75 ft/s - 0) / 15 s = \(5 ft/s^2.\)

Therefore, when x = 50 ft and the constant speed is 75 ft/s, the Ac components of the velocity and acceleration are: v = 75 ft/s and a = \(5 ft/s^2.\)

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Answer:

True all waves that go up must come down

I feel like the follow the rule of gravity:everything that goes up must come d5

if you know it you will I have no idea bro bit like you csn figure it out just quess say it's a

Answer:

so yeah it is Respuesta

Answer:

nuclear fusion

Explanation:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons

Answer:

Nuclear fusion

Explanation:

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Answer: Pitch of the sound depends on the frequency of the sound wave. The pitch is affected by the source of production of sound wave. It also depends on the shape of the medium in which it travels.

Explanation:

Answer:

approximately 90.19%

Explanation:

To calculate the percentage of change in voltage values relative to the initial value, we can use the polar form of complex numbers and the formula for percentage change.

Given complex numbers in polar form:

V1 = 15 ˪70

V2 = 2 ˪30

To calculate the percentage change, we'll compare the magnitude (amplitude) of the complex numbers.

Magnitude of V1 = 15

Magnitude of V2 = 2

Percentage change = (|V2 - V1| / |V1|) * 100%

|V2 - V1| = |2 ˪30 - 15 ˪70|

To subtract complex numbers in polar form, we subtract their magnitudes and subtract their angles:

|V2 - V1| = √((2^2 + 15^2) - 2 * 2 * 15 * cos(30 - 70))

Calculating the magnitude:

|V2 - V1| = √((4 + 225) - 60 * cos(-40))

|V2 - V1| = √(229 - 60 * cos(-40))

Now, we can substitute the values into the percentage change formula:

Percentage change = (|V2 - V1| / |V1|) * 100%

Percentage change = (√(229 - 60 * cos(-40)) / 15) * 100%

Calculating this expression will give us the percentage change in voltage values relative to the initial value.

There is a decrease of approximately 86.67% in the voltage values relative to the initial value.

The polar form of a complex number is given by r∠θ, where r represents the magnitude or modulus of the complex number, and θ represents the angle in radians. The exponential form of a complex number is given by re^(iθ), where r is the magnitude and θ is the angle in radians.

For V1 = 15∠70°, we can calculate the magnitude and angle using the polar form. The magnitude is 15, and the angle is 70°. For V2 = 2∠30°, the magnitude is 2, and the angle is 30°.

To calculate the percentage of change relative to the initial value (V1), we can use the formula:

Percentage change = [(V2 - V1) / V1] * 100.

Substituting the values, we get:

Percentage change = [(2 - 15) / 15] * 100 = -86.67%.

Therefore, there is a decrease of approximately 86.67% in the voltage values relative to the initial value.

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