Light is travelling through air reaches quartz at an angle of incidence of 35°. The index of refraction of quartz is 1.54. At what angle of refraction does the light travel into the quartz?

If the light from a galaxy fluctuates in brightness very rapidly, it suggests that the region producing the radiation is very small. The rapid fluctuations indicate a compact emission source within the galaxy. Therefore, the correct answer is B. very small.

1. Rapid fluctuations in brightness: When the light from a galaxy fluctuates rapidly in brightness, it means that the intensity of the emitted radiation is changing quickly over short time intervals.

2. Relationship to the size of the region: The speed at which the fluctuations occur provides information about the size of the region producing the radiation. If the fluctuations are happening rapidly, it suggests that the region responsible for the emission must be very small.

3. Compactness of the emission source: A small-sized region implies that the emission is coming from a compact source within the galaxy. This could be due to various factors such as a small and dense object, a localized burst of activity, or a highly energetic event occurring within a confined area.

Therefore, when the light from a galaxy fluctuates in brightness very rapidly, it indicates that the region producing the radiation must be very small. This helps astronomers infer the nature of the emission source and the processes occurring within the galaxy.

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Answer: hey!

youre answer is

In order to meet up at the trailing edge, the molecules going over the top of the wing must travel faster than the molecules moving under the wing. Because the upper flow is faster, then, from Bernoulli's equation, the pressure is lower. The difference in pressure across the airfoil produces the lift.

Airplane wings are shaped to make air move faster over the top of the wing. When air moves faster, the pressure of the air decreases. So the pressure on the top of the wing is less than the pressure on the bottom of the wing. The difference in pressure creates a force on the wing that lifts the wing up into the air.

Bernoulli's Principle, states that pressure decreases when air moves faster. Air moves faster over the top of a wing, which results in an area of lower pressure. Meanwhile, the bottom of the wing experiences higher pressure. Camber increases the difference in air pressure between the top and bottom surfaces.

Explanation:

pls put brainliest

hope this helps

The correct statement is that, music can be a positive influence as well as a negative one.

Among human behaviors, listening to music is one of the most enigmatic. The majority of ordinary behaviors have an obvious value that can be convincingly linked to the utilitarian goals of survival and reproduction.

One of the most popular pastimes is listening to music. People almost always have music with them in their daily lives.

Studies do, however, indicate that music might have a long-term effect on our mood, causing melancholy or anxiety to worsen.

In certain cases, perhaps more so than external stresses and environmental conditions, specific songs, certain lyrics, and certain musical genres are more likely to exacerbate depression or anxiety.

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To determine the position of the minute hand at 8:15 a.m., we can use the following approach:

Convert the time to radians: At 8:15 a.m., the minute hand is 75% of the way from the 8:00 a.m. mark to the 9:00 a.m. mark. Since the minute hand travels 360 degrees in 60 minutes, it travels 6 degrees per minute. Therefore, at 8:15 a.m., it has traveled 90 degrees from the 8:00 a.m. mark. This is equivalent to (90/360) x 2π radians = π/2 radians. Use trigonometry to determine the position: Since the minute hand is 3.00 cm long and pointing in the direction of the positive x-axis at 8:15 a.m., its position can be described by the coordinates (3.00 cos(π/2), 3.00 sin(π/2)) = (0, 3.00). Therefore, the minute hand is pointing straight up at 8:15 a.m. Note that the x-axis points in the same direction as the minute hand at 8:15 a.m., while the y-axis points in the same direction as the minute hand at 8:00 a.m. This means that the x-axis is perpendicular to the minute hand at 8:00 a.m., and the y-axis is perpendicular to the minute hand at 8:15 a.m.

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To find the % composition of the compound, we need to first determine the empirical formula by finding the smallest whole number ratio of atoms present in the compound.

Step 1: Convert the given masses of Mg and N to moles using their respective atomic masses.

Moles of Mg = 9.03 g / 24.31 g/mol = 0.371 mol
Moles of N = 3.48 g / 14.01 g/mol = 0.248 mol

Step 2: Divide both the number of moles by the smallest number of moles obtained to get the simplest whole number ratio.

0.371 mol / 0.248 mol = 1.49 (approx. 1.5)
0.248 mol / 0.248 mol = 1

Therefore, the empirical formula of the compound is Mg3N2.

Step 3: Calculate the total molar mass of the compound.

Mg3N2 = (3 x 24.31 g/mol) + (2 x 14.01 g/mol) = 100.95 g/mol

Step 4: Calculate the % composition of each element in the compound.

% composition of Mg = (3 x 24.31 g/mol) / 100.95 g/mol x 100% = 72.12%
% composition of N = (2 x 14.01 g/mol) / 100.95 g/mol x 100% = 27.88%

Therefore, the % composition of the compound Mg3N2 is 72.12% Mg and 27.88% N.

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Answer:

Yeah it's right there from the one next to the exclamation point

Answer:

its not there

Explanation:

its literally not there

Answer:

Explanation:

The pressure at one end of the piston is equal to the pressure on the second piston.

Pressure = Force/Area

F1/A1 = F2/A2

Given

F1 = 250N

A1 = 2.0m²

A2 = 0.5m²

F2 = ?

Substituting the given values in the formula;

250/2 = F2/0.5

cross multiply

250*0.5 = 2F2

125 = 2F2

F2 = 125/2

F2 = 62.5N

Hence the  force needed to lift this piston if the area of the second piston is 0.5 m^2 is 62.5N

Answer:

\(\huge\boxed{\sf \lambda = 1,000 \ m}\)

Explanation:

Given Data:

Frequency = f = 300,000 Hz = 3 × 10⁵ Hz

Speed of light = c = 3 × 10⁸ ms⁻¹

Required:

Wavelength = λ = ?

Formula:

\(\displaystyle \lambda = \frac{c}{f}\)

Solution:

\(\displaystyle \lambda = \frac{3 \times 10^8}{3 \times 10^5} \\\\\lambda = \frac{10^8}{10^5} \\\\\lambda = 10^{8-5}\\\\\lambda = 10^3 \ m\\\\\lambda = 1,000 \ m\\\\\rule[225]{225}{2}\)

Answer:When prfessionals take data collections its important becasue it can cause error. Lets say they are sloppy with thier work and end up getting something that is not near what should be happening. This can have a major affect on the truth of what they are doing and an effect on thier end result in general.

Explanation:

Answer:

When prfessionals take data collections its important becasue it can cause error. Lets say they are sloppy with thier work and end up getting something that is not near what should be happening. This can have a major affect on the truth of what they are doing and an effect on thier end result in general.

Explanation:

Answer:

GET GOOD

Explanation:

The answer is photocoagulation.

The use of a laser beam to seal leaky blood vessels and to prevent the growth of new ones in diabetic retinopathy is called laser photocoagulation.

What is photocoagulation?

A minimally invasive method used to treat numerous retinal illnesses is photocoagulation of the retina, also known as retinal laser photocoagulation. The retina may expand due to aberrant leaky blood vessels developing across it in a number of disorders. Laser photocoagulation uses thermal energy above 65 °C to burn the retinal tissue by creating thermal burns. This can prevent the retina from being damaged by the bleeding blood vessels. In addition to causing fibrosis, laser photocoagulation can also seal retinal tears. Laser photocoagulation is typically unable to recover already lost vision in cases of retinal disease, but it can slow the progression of the condition, lower the chance of further vision loss, and preserve residual vision. The likelihood of problems following the operation is quite minimal.

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The use of a laser beam to seal leaky blood vessels and to prevent the growth of new ones in diabetic retinopathy is called laser photocoagulation.

What is photocoagulation?

A minimally invasive method used to treat numerous retinal illnesses is photocoagulation of the retina, also known as retinal laser photocoagulation. The retina may expand due to aberrant leaky blood vessels developing across it in a number of disorders.

Laser photocoagulation uses thermal energy above 65 °C to burn the retinal tissue by creating thermal burns. This can prevent the retina from being damaged by the bleeding blood vessels. In addition to causing fibrosis, laser photocoagulation can also seal retinal tears.

Laser photocoagulation is typically unable to recover already lost vision in cases of retinal disease, but it can slow the progression of the condition, lower the chance of further vision loss, and preserve residual vision. The likelihood of problems following the operation is quite minimal.

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Answer:

6

Explanation:

From the given question, since a total of 12 V was obtained from the battery which is made up of a number of cells with each producing 2.0 V.

Assuming that the cells have a very low internal resistance, then;

minimum number of electric cells in the car battery = \(\frac{total voltage from the cells}{individual voltage of the cells}\)

                                          = \(\frac{12}{2}\)

                                          = 6

Thus, the minimum number of electric cells in the car battery is 6.

This implies that the addition of 6 cells which has 2.0 V supply in the battery produces a total of 12 V. Provided that the cells have a very low internal resistance.

Answer:

Distance is typically measured in units such as meters or miles. Time is measured in units such as seconds or hours. Speed is calculated by dividing the distance traveled by the time it took to travel that distance. The formula for speed is speed = distance / time.

The answer to this question is :0.4.

The load factor for bolted joint B can be determined using the equation: Load Factor = Applied Load / Proof Load.

First, we need to calculate the proof load for one M14x2 class 4.8 bolt. The proof load is defined as the maximum load that can be applied to a bolt without causing permanent deformation. The proof strength for class 4.8 bolts is 310 MPa, and the stress area for an M14 bolt is 115 mm^2. Thus, the proof load for one bolt is:

Proof Load = Proof Strength * Stress Area = 310 MPa * 115 mm^2 = 35650 N

Since we have four bolts, the total proof load for the joint is:

Total Proof Load = 4 * Proof Load = 4 * 35650 N = 142600 N

To calculate the load factor, we need to know the applied load. If the applied load is known, we can simply divide it by the proof load to get the load factor. If not, we can calculate the maximum load that can be applied to the joint without exceeding the proof load. In this case, we assume that the applied load is distributed equally among the four bolts, so the maximum load that can be applied to one bolt is:

Maximum Load = Proof Load / Safety Factor

The safety factor is a design parameter that ensures that the joint can withstand loads greater than the expected operating load. A common safety factor for bolted joints is 2.5. Thus, the maximum load that can be applied to one bolt is:

Maximum Load = Proof Load / Safety Factor = 35650 N / 2.5 = 14260 N

Since we have four bolts, the maximum load that can be applied to the joint without exceeding the proof load is:

Maximum Applied Load = 4 * Maximum Load = 4 * 14260 N = 57040 N

Therefore, the load factor for bolted joint B is:

Load Factor = Applied Load / Proof Load = Maximum Applied Load / Total Proof Load = 57040 N / 142600 N = 0.4

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Answer:

0.2

Explanation:

if u divide 80.0 by 40 it gives you 4 but then you divide 0.10 it gives you 0.2

Answer:

Answer in below and plz mark me as brainlist plz

Explanation:

The rate of change of momentum =tm(v−u) Rate of change of momentum = force applied. Force∝tm(v−u) Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Impulse is a change in momentum

The rate of change of momentum =tm(v−u) Rate of change of momentum = force applied. Force∝tm(v−u) Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Impulse is a change in momentum

Answer:

you would fall forward due to inertia of motion..

Answer:

positive acceleration.

Explanation:

As its slowing down gradually, its positive acceleration. When the ball slows down, its acceleration vector is in the opposite direction of its motion. Therefore positive acceleration.

The given statement is that the temperature in degrees Fahrenheit in times square during a day in August can be predicted by the function t(x).

Hence, it can be stated that the function t(x) provides a prediction for the temperature in degrees Fahrenheit in Times Square for a given value of x. Here, x represents the input variable.

It is important to note that the input variable must be provided in the correct units and format as required by the function t(x).The content loaded refers to the data that has been previously collected and is available for analysis. In the context of predicting temperature using function t(x),

the content loaded can refer to temperature data collected in Times Square during August on previous days or years. This data can be analyzed and used to develop the function t(x) that predicts temperature for a given input variable x.

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Answer:

the comparison of known quantity to unknown quantity or standard guantity is called measurment

Given,

The current, I=0.25 A

The total charge flowing in the circuit is q=6812 C.

The electric current can be defined as the time rate of flow of the charges.

Thus, the electric current is given by,

Where t is the time duration.

Thus the batteries will fry out after 27248 s

The number of chromosomes in cells produced by mitosis and meiosis differs significantly. While mitosis results in the production of two daughter cells with the same number of chromosomes as the parent cell, meiosis results in the production of four haploid daughter cells with half the number of chromosomes as the parent cell.

Mitosis and meiosis are two different processes that result in the production of new cells. The number of chromosomes in the cells produced by these processes differs significantly.
Mitosis is a process of cell division that results in the production of two genetically identical daughter cells. The number of chromosomes in the cells produced by mitosis is the same as the parent cell. This means that if the parent cell has 46 chromosomes, each of the two daughter cells produced by mitosis will also have 46 chromosomes. This process is essential for the growth, repair, and maintenance of tissues in our body.
Meiosis, on the other hand, is a process of cell division that results in the production of four genetically diverse daughter cells. During meiosis, the number of chromosomes is reduced by half, resulting in the formation of haploid cells. If the parent cell has 46 chromosomes, each of the four daughter cells produced by meiosis will have only 23 chromosomes. This process is crucial for sexual reproduction, where two haploid cells combine to form a diploid zygote.
In summary, the number of chromosomes in cells produced by mitosis and meiosis differs significantly. While mitosis results in the production of two daughter cells with the same number of chromosomes as the parent cell, meiosis results in the production of four haploid daughter cells with half the number of chromosomes as the parent cell.

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Answer:

Magnetic energy can be transformed into kinetic energy in a variety of ways.

Explanation:

One way that this occurs is through electromagnetic induction. This occurs when a changing magnetic field induces an electric current in a conductor, such as a wire. This induced current creates a force that can move the conductor, thus transforming the magnetic energy into kinetic energy. This process is used in electric generators, which convert the kinetic energy of a turbine into electrical energy by turning a coil of wire inside a magnetic field.

Another way that magnetic energy can be transformed into kinetic energy is through the operation of an electric motor. An electric motor uses the interaction between a magnetic field and an electric current to create a force that can rotate a shaft, thus transforming the electrical energy into kinetic energy. Electric motors are used in a wide range of applications, including transportation, manufacturing, and household appliances.

Magnetic energy can also be transformed into kinetic energy through magnetohydrodynamics (MHD), which involves the interaction of a fluid with a magnetic field. When a fluid such as a gas or liquid moves through a magnetic field, it can generate a force that can propel the fluid, thus transforming the magnetic energy into kinetic energy. This process is used in some forms of propulsion, including maglev trains and MHD generators.

In summary, magnetic energy can be transformed into kinetic energy through the interaction of a magnetic field with a conductor, an electric current, or a fluid, which creates a force that can move an object, thus transforming the magnetic energy into kinetic energy.

Answer:

An interaction between electricity and magnetism produces an electromagnet, while a permanent magnet induces the paper clip's magnetic field.

Explanation:

A p e x :)

Answer:

Electric potential energy

Explanation:

The Electric potential energy of a system is less than that carried out by electrostatic forces during the development of the system (as long as charges are initially cut infinitely).

The change in potential energy between an initial and final configuration  is equal to minus the work done by the electrostatic forces.

The acceleration of the rocket of mass 17250 kg when pushed with a thrust of 7236904 N is 409.73 m/s².

Acceleration can be defined as the rate of change of velocity

To calculate the acceleration of the rocket, we use the formula below, And this formula is obtained from newton's second law of motion.

Formula:

Where:

Make a the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The acceleration of the rocket is 409.73 m/s².

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Answer:

the answer is A. acceleration mom

Explanation:

:)

Compared to Miami, Denver's time will move more slowly. Going from Miami to Denver causes the value of g(gravitational acceleration) to decrease, increasing the value of the period of clock or T. The clock will run slower and oscillations will take longer when the period is increased.

The formula for the relationship between a pendulum's length, period of clock, and gravitational acceleration is: T = 2πL / g . According to this relationship, the period varies in direct proportion to the square root of the acceleration caused by gravity. So, less g values results to high period of clock or clock will run slower.

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Answer:

Answer shown above.

Have a good day