If a star is receding (moving away from us) at a speed of 0.8% of the speed of light, at what wavelength would a spectral line with a laboratory wavelength of 543 nm be observed

Answer:

Explanation:

Gases move from high-pressure areas to low-pressure areas. And the bigger the difference between the pressures, the faster the air will move from the high to the low pressure. That rush of air is the wind we experience.

Answer:

points are needed

Explanation:

Answer:Carbon

Explanation:

Carbon is CO2

Answer:

Hey bro here's the answer

The answer is 1.66m/s^2 and 99.6 N

Explanation:

Solu

Here,

Mass of the Moon (M)=7.2 ×10^22 kg

Radius(R) = 1.7 × 10^6 m

Gravitational constant (G)=6.67×10^-11 Nm2/kg2

Acceleration (a)=?

We know that ,

g moon =GM/r^2

=6.67 ×10^-11 ×7.2 ×10^22

______________________

(1.7×10^6)2

=48.024 ×10^-11+22

__________________

2.89 ×10^12

= 16.61 ×10^-11+22-12

=16.61×10^-1

= 1.66 m/s2

Now,

weight of man (w)= m × g

= 60 × 1.66

= 99.6N

:. Weight if man is 99.6 N and acceleration due to gravity is 1.66 m/s2

hope it helps

#Tmg ✓

The metric system uses Celsius as the primary unit of measurement for temperature.

Nearly all nations in the world use the metric system as their official unit of measurement, which includes Celsius. The Celsius scale is used to measure temperature in most scientific disciplines. The freezing point of water is zero degrees Celsius, and the boiling point is one hundred degrees Celsius. By the middle of the 20th century, Celsius, the most widely used temperature unit in the modern metric system, had been adopted by the majority of the world. Anders Celsius, a Swedish astronomer, created the Celsius scale in 1742.

Most places in the globe measure temperature using the Celsius system (°C). The historical development of this empirical scale led to the definition of its zero point, 0 °C, as the freezing point.

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1). The current in the circuit is 0.9 A.

Using Ohm's Law, we can find the current in the circuit:

I = V/R

In this case, the resistance is 10 ohms and the voltage is 9V, so we have:

I = 9V / 10 ohms = 0.9 A

Therefore, the current in the circuit is 0.9 A.

2). The voltage in the circuit is 120.05 V.

Using Ohm's Law, we can find the voltage in the circuit:

V = I*R

In this case, the resistance is 35 ohms and the current is 3.43 A, so we have:

V = 3.43 A * 35 ohms = 120.05 V

Therefore, the voltage in the circuit is 120.05 V.

3). To find the resistance of the circuit from the graph, the resistance of the circuit is 2 ohms.

Resistance (R) = Voltage (V) / Current (I)

Since the graph shows a straight line, it means that the resistance of the circuit is constant. We can find the resistance of the circuit by calculating the slope of the line.

Slope = Rise / Run = ΔV / ΔI

Looking at the graph, we can see that the voltage increases by 4V when the current increases by 2A. Therefore:

ΔV = 4V

ΔI = 2A

Slope = ΔV / ΔI = 4V / 2A = 2 ohms

Therefore, the resistance of the circuit is 2 ohms.

4). The current pass through the circuit is \(I_{2}\) is 2 A.

We can solve this problem by using the principle of conservation of energy. The total energy provided by the battery is equal to the sum of the energy dissipated by the resistors. Since the resistors are connected in parallel, the voltage across each resistor is the same.

The energy dissipated by a resistor is given by the formula:

E = I^2 x R x t

where E is the energy dissipated, I is the current flowing through the resistor, R is the resistance of the resistor, and t is the time for which the current flows.

For the circuit with resistor R1, the energy dissipated is:

E1 = I x R1 x t

For the circuit with resistor R2, the energy dissipated is:

E2 = I2 x R2 x t

Since the batteries are identical, the total energy provided by the battery is the same for both circuits. Therefore, we have:

E1 + E2 = I x R1 x t + I2 x R2 x t

Substituting the given values, we get:

2 x (30) x t + I2 x (45) x t = 2 x (30 + 45) x t

Simplifying, we get:

60t + 45I2t = 150t

15I2t = 90t

\(I_{2}\) = 6 A/3 = 2 A

Therefore, the value of \(I_{2}\) is 2 A.

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Conventional method of heat transfer.​

How it works?

For example:

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Answer:

one of the reasons is that it wets the glass thermometer it also doesn't detect slight changes in temperature of the atmosphere it has a high boiling point I don't know the rest

Answer:

49 is the answer

Explanation:

Take the highest number and the lowest and subtract! :)

Answer:

45 m

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 0.5 kg

Initial height (h₁) = 30 m

Initial potential energy (PE₁) = 20 J

Final potential energy (PE₂) = 30 J

Final height (h₂) =?

From:

PE = mgh

PE / h = mg = constant

Thus,

PE₁ / h₁ = PE₂ / h₂

With the above formula, we can obtain the final height of the bird as follow:

Initial height (h₁) = 30 m

Initial potential energy (PE₁) = 20 J

Final potential energy (PE₂) = 30 J

Final height (h₂) =?

PE₁ / h₁ = PE₂ / h₂

20 / 30 = 30 / h₂

Cross multiply

20 × h₂ = 30 × 30

20 × h₂ = 900

Divide both side by 20

h₂ = 900 / 20

h₂ = 45 m

Therefore, the final height of the bird is 45 m.

Answer:

A water fall?

Explanation:

It's an example I took in my science class

"For example, when you exercise you get hot. The heat you feel in your body results from the energy transfers that happen when you move. When you sweat, your body expends energy to cool itself down. A food chain shows how energy flows from one organism to another."

Answer: a) 36 m/s

B) 64 m

Explanation:

A) d= ½ (Vi+Vf)t

d= ½ (0+12)6

d= 36 m/s

B) 100 – 36 = 64

Answer:

The equation for wave speed can be used to calculate the speed of a wave when both wavelength and wave frequency are known. Consider an ocean wave with a wavelength of 3 meters and a frequency of 1 hertz. The speed of the wave is: Speed = 3 m x 1 wave/s = 3 m/s.

Explanation:

It's worth noting that even though the player is moving forward, there is no net force in the horizontal direction. The forward force exerted by the player is balanced by the backward force of friction from the ground, resulting in a net force of zero.

To determine the force exerted by the winning player on the ground to move forward, we need to consider Newton's second law of motion, which states that the force (F) acting on an object is equal to the mass (m) of the object multiplied by its acceleration (a):

F = m * a

In this case, the player's mass plus equipment will contribute to the total mass (m). Let's denote the mass of the player plus equipment as M.

Now, if the player is moving forward with a constant velocity, it means there is no net acceleration. However, the player still exerts a force on the ground in order to overcome friction and maintain the motion. This force is called the propulsive force.

Assuming there is no other external force acting on the player, we can write the equation as follows:

\(F_{propulsive }= M * a\)

Since the velocity is constant, the acceleration (a) is zero. Therefore, the propulsive force exerted by the winning player on the ground is zero.

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The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

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The amount of information available, the length of time available to examine it, and consequently the complexity of weather occurrences limit one's ability to express their skill to predict the weather.

Models employ estimations and assumptions to forecast the weather because it is impossible to collect data from the future. These estimations from the models get less accurate as time goes on since the atmosphere is continually changing.

Probabilistic techniques accurately depict the uncertainty where deterministic plans provide exact average quantities with a known but unquantified uncertainty.

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A white dwarf remains stable in size due to electron degeneracy pressure, which prevents its atoms from collapsing further despite the absence of nuclear fusion reactions.

A white dwarf is a remnant of a low to medium mass star that has exhausted its nuclear fuel and undergone gravitational collapse. As the star's core collapses, its electrons become tightly packed together, leading to electron degeneracy pressure that opposes further compression. This results in a stable size for the white dwarf, where the inward force of gravity is balanced by the outward force of electron degeneracy pressure. Since there are no nuclear fusion reactions to generate heat, the white dwarf eventually cools and dims over time, becoming a cold black dwarf.

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Answer:

The molecular structure of photovoltaic cells is important for their efficiency because it affects the ability of the cells to absorb and convert light into electricity. The photovoltaic effect, which is the basis of solar cell operation, occurs when photons of light excite electrons within the cell material, causing them to become free from their atomic bonds and creating an electrical current.

The molecular structure of the photovoltaic cell material determines the electronic properties of the material, such as the bandgap energy and the electron mobility, which play a crucial role in the photovoltaic effect. The bandgap energy determines the minimum energy required to excite an electron, and the electron mobility determines how easily the electrons can move within the material.

If the molecular structure is poorly designed, the bandgap energy may be too low to effectively absorb the desired light, or the electron mobility may be too low to allow the electrons to move efficiently, both of which can lead to a reduction in efficiency. On the other hand, if the molecular structure is optimized, the photovoltaic cells can absorb light more effectively, the electrons can move more efficiently, and the overall efficiency of the cells can be improved.

Therefore, the molecular structure of photovoltaic cells is an important factor in determining their efficiency and is carefully considered by scientists and engineers in the design and development of new photovoltaic materials and technologies

The protostellar outflows, which are high-speed jets of gas ejected from young stars, can collide with the surrounding gas in the molecular cloud and create shock waves.

As the protostellar outflows slam against the gas in the molecular cloud, they create a disturbance that propagates through the gas, creating a shock wave. This shock wave is a region where the gas undergoes a sudden increase in pressure, temperature, and density. The energy released by the collision between the outflow and the gas is converted into kinetic energy of the gas particles, which move at extremely high speeds and collide with other gas particles, creating a cascade of collisions that heats up the gas.

The magnetic field in the shocked gas can be inferred from the polarization of the light emitted by the gas. When light passes through a magnetized medium, it gets polarized, meaning that the electric field of the light wave oscillates preferentially in a certain direction. By measuring the polarization of the light emitted by the shocked gas, astronomers can deduce the orientation and strength of the magnetic field in the gas. This technique is called polarization mapping and has been used to study the magnetic fields in various astrophysical objects, including protostellar outflows.
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ITS A a AAA A A  a A A  A A A A A

To answer your question about the FFT of a 50% duty cycle square wave that goes from 0 to 1 volt at 1Hz and the frequency we are trying to keep for a PWM DAC application:

For a 50% duty cycle square wave at 1Hz, the fundamental frequency we are trying to keep for a PWM DAC application is 1Hz. This is because the square wave has a frequency of 1Hz, and in a PWM DAC application, the goal is to reproduce the original signal accurately.

Therefore, the fundamental frequency of interest is the same as the frequency of the square wave, which is 1Hz.

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The laws enunciated by Newton, and considered as the most important in classical mechanics, are three: the law of inertia, the relationship between force and acceleration, and the law of action and reaction. Newton argued that all movements adhere to these three main laws, formulated in mathematical terms.

Answer:

In classical mechanics, newton's laws of motion are three laws that describe the relationship between the motion of an object and the forces acting on it.

Answer:

The fluid friction or drag can be reduced are minimised by giving special shape called streamlined shape to the objects which Move through fluids like air or water

Answer:

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A relatively dense protogalactic cloud more likely to produce an elliptical galaxy than a spiral galaxy Because of High gas density cooling took faster and also stars forms  faster before gas settle into a disk .

The higher gas density forms stars more efficiently, so all the gas is converted into stars before a disk can form. Hence , a relatively dense protogalactic cloud more likely to produce an elliptical galaxy than a spiral galaxy

Because of High gas density cooling took faster and also stars forms  faster before gas settle into a disk . It also have low or no initial angular momentum

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Answer:

Option C, Turbines

Explanation:

An electric motor comprise of following components-

a) Magnets

b) Electric wire or solenoid

c) Motor shaft

Turbine is a component of power producing plant that is essential to rotate the shaft of the motor. Once the shaft is rotated, the electric coil placed between the magnets is also rotated. Rotating coil cut the magnetic fields to induce emf and hence electric current is produced from mechanical work (i.e rotation).

Hence, option C is correct

Your community is considering building a dam on a nearby river to reduce flooding. yes, this proposal need support. because through dam we can store flood water.

A physical barrier known as a dam slows or limits the flow of surface or subsurface water. Reservoirs built by dams provide water for navigation, aquaculture, irrigation, human consumption, industrial use, and other purposes.

Let's examine some of a dam's uses now that we have a basic understanding of what a dam is. It is valued as a resource for water. They provide water for a variety of uses, including home, agricultural, and industrial ones. Dams are also utilised to produce energy and improve river transportation. Dams are used more and more frequently in daily life. Dams also promote local tourism, which contributes to the growth of the nation. Dams can be used for many different things.

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Answer:

Sample Response: The data for the first part of the experiment support the first hypothesis. As the height of the cylinder increased, the temperature of the water increased. At a greater height, the cylinder has more gravitational potential energy. This gravitational potential energy was completely converted to thermal energy, which increased the temperature of the water.

Explanation:

this the sample response from ED mechanical equivalent of heat lab.

Answer:

Sample response:

Explanation:

The data for the first part of the experiment support the first hypothesis. As the height of the cylinder increased, the temperature of the water increased. At a greater height, the cylinder has more gravitational potential energy. This gravitational potential energy was completely converted to thermal energy, which increased the temperature of the water.