Questlon 3 of 5 What statement best describes what a circle graph shows? O A. Data as proportions of a whole B. The relationship between two variables OC. A frequency distribution D. The average of a data set​

The critical angle of the transparent material is 35.3 degrees.

The critical angle is the angle of incidence at which the angle of refraction is 90 degrees. In this case, the angle of refraction is 32 degrees. Therefore, the critical angle is calculated as follows:

sin(critical angle) = sin(90 degrees) / sin(angle of refraction)

sin(critical angle) = 1 / sin(32 degrees)

sin(critical angle) = 0.574

critical angle = arcsin(0.574)

critical angle = 35.3 degrees

Therefore, the critical angle of the transparent material is 35.3 degrees.

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Answer:

B

Explanation:

.....50N-20N =30N ...

Answer:

B.  30 N to the right

Explanation:

The weight of the car, 2500 N, is pushing down while the road is pushing up with a force of equal magnitude. Those forces cancel each other out. The car is being pushed to the left with a force of 20 N and to the right with a force of 50 N. Thus, the cumulative force is 30 N to the right.

Answer:

here's the answers!

Explanation:

A mover carries a box up a flight of stairs.

A mover carries a box across a room.

A weightlifter lifts a barbell off the ground.

hope it helps u!

Answer:

A, D, E

Explanation:

Did it

Answer:

Explanation:

F=ma

a=change in velocity/time

f=m*change in velocity/time

velocity= Force*time/mass

Answer:

(I will talk in my opinion only)

electronics do harm our mental health but they are also helpful ones like mobile both a boon and a curse

physical health is greatly affected and it's something no need to explain

social ( for me ) my only place to be social and talk people is brainly so for me mobile is very important

Answer:

Just a little bit. You should not be on electronics all the time. I know some people that are so addicted to there electronics that they won't even hang out with people. If you are at the point where you think about things other than school, friends, and family...you should think about getting off of your electronics and go play with a neighborhood friend outside, or have a sleepover! Your whole life should not count on your phone, iPad, or your laptop.

Explanation:

Hope this helps! No recorces included in this writing.

Answer:

Wandering Slowly with no pattern

Explanation:

I apologize to those who got it wrong from the first person.

The Earth's magnetic pole is wandering slowly with no pattern. Then the correct option is D.

Magnetic poles are the points near the extremities of the axis of rotation of the Earth or another celestial body where a magnetic needle dips vertically.

At either end of a magnet, the magnetic pole is where the applied magnetic field is strongest. An imaginary basic particle known as a magnetical monopole may be referred to as a magnet's pole. A unique type of magnet is the magnetism poles of celestial bodies.

The north magnetism pole of the earth Today is located where the north arrow is on a path leading downhill.

The magnetic pole is located far away from the geographic pole.

Earth's magnetic pole is defined as wandering slowly with no pattern.

Thus, the correct option is D.

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Answer:

The cha-cha-cha, is a dance of Cuban origin. It is danced to the music of the same name introduced by Cuban composer and violinist Enrique Jorrin in the early 1950s. This rhythm was developed from the danzón-mambo

Free body diagram:

Here, T_1 is the tension in the left cable (T_1=30000 N; given), T_2 is the tension in the right cable, W is the weight of the tram.

The force equation in horizontal direction is given as,

Therefore, the tension in right cable T_2 is given as,

Substituting all known values,

The force equation in the vertical direction is given as,

Substituting all known values,

Therefore, the weight of the tram is 8038.47 N.

Animals eat seeds, then those seeds are spread by animals.

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The chemical formula for the compounds are

Carbon monoxide: CO

Nitrogen dioxide: NO2

Sulfur trioxide: SO3

Silicon dioxide: SiO2

Carbon tetrachloride: CCl4

Carbon dioxide: CO2

A chemical formula is a symbolic representation of the chemical composition of a substance, indicating the elements present in the substance and the ratio in which they are present.

It consists of chemical symbols and numerical subscripts that indicate the number of atoms or ions of each element present in a molecule or formula unit of a compound.

For example, the chemical formula for water is H2O, which indicates that a water molecule contains two hydrogen atoms and one oxygen atom.

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Answer:

"The process in which iron (Fe) is reacting to water (H2O) and oxygen (O) to form iron oxide (Fe2O3) is a perfect demonstration of a chemical change."

________________________________________________________

"A chemical change occurs when one chemical substance is transformed into one or more different substances, for instance how iron becomes rust after a chemical change. In this situation, there is a chemical change occurring, transforming a chemical substance (iron) into iron oxide due to the reaction when combined with that of water and oxygen. Hence, the best demonstration of chemical change out of the listed situations above would be Option D."

Hope this helps! If so, please lmk! Thanks and good luck!

Chemical transitions, commonly referred to as chemical reactions, are processes that change one or more chemicals into one or more brand-new, distinct substances. The correct option is D.

A chemical change is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these. It happens when two compounds unite to create a new substance (synthesis) or when two substances break down to create new substances.

Iron, oxygen, and water react to form rust as a result. Iron oxide is also referred to as rust. The chemical reaction is shown graphically as 4Fe (s), 3O₂ (g) → 2Fe₂O₃ + H₂O (l).

Thus the correct option is D.

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Answer:

v=\(\frac{S}{t}\) = 1.43 miles/hour

2500 ft = 0.473 miles

20 min = 0.33 hour

Explanation:

The definition of speed allows you to find the answer for the speed of the scooter is:

          v = 1.42 mi / h

The velocity of a body is defined as the change in position between the time of the interval

         \(v = \frac{\Delta x}{t}\)

Where v is the velocity, Δx the change in position and t the time

They indicate that the distance is Δx = 2500 ft and the time is t = 20 min, we look for the velocity

          v = \(\frac{2500}{20}\)

          v = 125 ft / min

In the problem they indicate that the answer is given in miles per hour, let's reduce the units

       v = 125 ft / min (\(\frac{1 mile}{5280 ft}\))  (\(\frac{60min}{1h}\))

       v = 1.42 mi / h

In conclusion using the definition of speed we can find the answer for the speed of the scooter is:

          v = 1.42 mi / h

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Answer:

  0.83 m or 5.57 m

Explanation:

Destructive interference will occur when the distances from the speakers differ by 1/2 wavelength.

The length of 1 cycle of 72.4 Hz is ...

  λ = v/f = (343 m/s)/(72.4 Hz) ≈ 4.738 m

So, the distance of the listener from speaker B is ...

  3.2 m ± (4.738 m)/2 = {0.83 m, 5.57 m} . . . either of these distances

_____

The location could be at additional multiples of 4.738 m, but we think not. The sound intensity drops off with the square of the distance from the speaker, so identical sound waves from the speakers will sound quite different at different distances from the speakers. For best interference, the distances need to be as close to the same as possible. That will be at 3.2 m and 5.57 m.

_____

Comment on the speed of sound

We don't know what speed you are to use for the speed of sound. We have used 343 m/s. Some sources use 340 m/s, which will give a result different by 2 or 3 cm.

Answer:

5.57 for acellus

Explanation:

Answer:

7500 Newtons

Explanation:

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Hence, let the Force acting on it be F

\(We\ know\ that,\\Force=Mass*Acceleration\\F=ma\\\\Here,\\F=1500*5\\=7500 kg m/s^2\ or\ 7500\ Newtons\)

Answer: d is correct

Explanation:

i did the quiz

The amplitude decreases.

the combined result of two or more wave trains travelling in parallel or coincident directions. The result is the result of adding the individual wave amplitudes at each place that is influenced by multiple waves, called interference.

types of interference -

When the crests of two waves overlap, constructive interference takes place. The illustration above depicts what occurs. The crests of the waves merge as they pass past one another to create a wave with a larger amplitude. The similar thing can occur when two troughs interact.

When two wave's maxima are 180 degrees out of phase, destructive interference happens: a positive displacement of one wave is precisely cancelled by a negative displacement of the other wave. The resultant wave has zero amplitude.

When one wave crest overlaps the crest of another and they add together what happens to the amplitude decreases.

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Answer:

The amplitude is increased.

Explanation:

Atoms of the pair P and Cl will form covalent bonds in the compound. The correct option is (D)

Covalent bonds are formed between two non-metals. Of the given options the only option that has two non metals is P ( Phosphorous ) and Cl ( Chlorine ). Therefore they will form a covalent bond in a compound.

Chlorine is a halogen. It belongs to group 17 of the periodic table. Phosphorous is a p-block element which belongs to group 15. Group 15 is also called as nitrogen family.

Therefore, the atoms of the pair P and Cl will form covalent bonds in the compound. The correct option is (D)

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Explanation:

the speed of sound depends on the particles of the medium of the sound wave is moving through because the particles in the solid and tightly packed together South Wales weekly transfers energy from particle to particle in a solid

It takes more energy to heat up 1 kg of cold water than 0.5 kg of cold water to the same temperature because water has a relatively high specific heat capacity. The specific heat capacity is the amount of energy required to raise the temperature of one unit of mass of a substance by one degree Celsius.

In other words, it takes more energy to raise the temperature of a larger mass of water than a smaller mass of water by the same amount. This is because the larger mass of water requires more energy to overcome the intermolecular forces between its molecules, which are stronger than in a smaller mass of water.

Additionally, since water has a high specific heat capacity, it can absorb a lot of heat energy without a significant increase in temperature. Therefore, a larger mass of water requires more energy to raise its temperature by the same amount compared to a smaller mass of water.

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a. The ball was in the air for 5.53 seconds.

b. The initial velocity of the ball is 54.194 m/s

c. The final velocity of the ball in the y direction is -54.194 m/s

d. The x component of the initial velocity is 50.926 m/s, and the y component is 18.534 m/s.

To solve these questions, we can use the equations of motion for projectile motion. Let's assume the acceleration due to gravity is -9.8 m/\(s^2\) (taking downward as the negative direction).

a. To find the time the ball was in the air, we can use the equation:

Δy = v_iy * t + (1/2) * a_y * \(t^2\)

Where Δy is the vertical displacement, v_iy is the initial vertical velocity, a_y is the vertical acceleration, and t is the time.

Since the ball was dropped from rest, its initial vertical velocity is 0 m/s, and the vertical displacement is -150 m (negative because it is going downward).

-150 = 0 * t + (1/2) * (-9.8) * \(t^2\)

Simplifying the equation and solving for t, we get:

4.9 * \(t^2\) = 150

\(t^2\) = 150 / 4.9

t ≈ 5.53 seconds

Therefore, the ball was in the air for approximately 5.53 seconds.

b. To find the initial velocity of the ball, we can use the equation:

v_fy = v_iy + a_y * t

Where v_fy is the final vertical velocity.

Since the ball lands 30 m away, its final vertical displacement is 0 m, and the time is 5.53 seconds.

0 = v_iy + (-9.8) * 5.53

Solving for v_iy, we get:

v_iy = 9.8 * 5.53

v_iy ≈ 54.194 m/s

Therefore, the initial velocity of the ball is approximately 54.194 m/s.

c. The final velocity of the ball in the y direction is the same as the initial velocity because the only force acting on it is gravity, which causes a constant acceleration. Therefore, the final velocity in the y direction is approximately -54.194 m/s (negative due to the downward direction).

d. When the ball is kicked off the building at an angle of 20 degrees below the horizontal, we need to find the x and y components of the initial velocity.

The magnitude of the initial velocity (from part b) is 54.194 m/s.

The x component of the initial velocity can be found using:

v_ix = v_i * cos(θ)

Where θ is the angle of 20 degrees below the horizontal.

v_ix = 54.194 * cos(20)

v_ix ≈ 50.926 m/s

The y component of the initial velocity can be found using:

v_iy = v_i * sin(θ)

v_iy = 54.194 * sin(20)

v_iy ≈  18.534 m/s

Therefore, the x component of the initial velocity is approximately 50.926 m/s, and the y component is approximately 18.534 m/s.

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The question was Incomplete, Find the full content below:

A soccer ball is kicked off a 150 m tall building and lands 30 m away.

a. How long was the ball in the air?

b. What was the initial velocity of the ball?

C. What is the final velocity of the ball in the y direction?

d. Assume the ball has the same speed as you solved for in part b except it is kicked off the building at an angle of 20 degrees below the horizontal. What is the x component of the initial velocity? What is the y component of the initial velocity?

Answer: 1120673.9 volts

Explanation:

The de Broglie wavelength of an electron is given by the equation λ = h / (mv), where h is the Planck constant, m is the mass of the electron, and v is its velocity.

The kinetic energy of an electron can be calculated from the potential difference it is accelerated through, using the equation KE = qV, where q is the charge of the electron and V is the potential difference.

Setting these two equations equal to each other, we get λ = h / (mv) = h / √(2mKE).

Solving for V, we get V = KE / q = (h^2 / 2mq) / λ^2.

Substituting the given values, we get V = (6.626 x 10^-34 J.s)^2 / (2 x 9.109 x 10^-31 kg x 1.602 x 10^-19 C x (0.27 x 10^-9 m)^2)

Thus, V = 1120673.9 volts (approx).

Answer:

electrons have a negative charge, while protons have a positive charge

Explanation:

In science "opposites attract"

A one-time pad is a type of encryption that is completely unbreakable if it is done correctly. It works by generating a random key that is at least as long as the message being encrypted. The key is then combined with the message using an XOR operation.

This produces a ciphertext that cannot be decrypted without the key. The key is used only once and then discarded, hence the name "one-time pad". A one-time pad is completely unbreakable because there is no pattern to the key that can be used to decrypt the message. Each character in the key is generated randomly and independently of the other characters. Therefore, the key is completely unpredictable. Even if an attacker knows the key length and has access to the ciphertext, they cannot use any techniques to decrypt it.

This is because there is no pattern to the ciphertext that can be used to determine the key.The only way to decrypt a one-time pad is to have the key. If an attacker tries to brute-force the encryption by trying all possible keys, they will generate every possible message that is the same length as the original message. This means that the ciphertext is completely meaningless without the key. It is therefore important to keep the key secret and ensure that it is only used once. ,Message: yellow stone Key: wolf To encrypt the given message using the vigenere cipher, we follow the steps below:Step 1: Write the message and key in a tabular form as shown below. To keep the process organized, we use the letters of the key to label the columns.

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Answer:

Explanation:

Using the efficiency formula;

Efficiency = Work done by the machine (output)/work done on the machine (input) ×100%

Efficiency =w/50 ×100

90 = 100w/50

Cross multiply

90×50 = 100W

4500 = 100W

W = 4500/100

W = 45Joules

Hence the lever does 45Joules of work on its load

2) Mechanical Advantage= Load/Effort

Given

MA = 4

Load = 500N

4 = 500/Effort

Effort = 500/4

Effort =125N

Hence the effort required to lift the load is 125N

1. The work done by the lever on its load is 45 J

2. The force needed to exert to lift the load is 125 N.

1. Determination of the work done by the lever on the load.

Work Input = 50 J

Efficiency = 90%

\(efficiency \: = \frac{work \: output}{work \: input} \times 100 \\ \\ 90\% = \frac{work \: output}{50} \\ \\ cross \: multiply \\ \\ work \: output \: = 90\% \: \times 50 \\ \\ work \: output = 0.9 \: \times 50\)

Therefore, the work done by the lever on the load is 45 J

2. Determination of the force needed to lift the load

Mechanical advantage (MA) = 4

Load (L) = 500 N

\(mechanical \: advantage \: = \frac{load}{effot} \\ \\ 4 \: = \frac{500}{effort} \\ \\ cross \: multiply \\ \\ 4 \: \times effort \: = 500 \\ \\ divide \: both \: side \: by \: 4 \\ \\ effort \: = \frac{500}{4} \\ \)

Therefore, the force needed to lift the load is 125 N

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you can analyze the relationship between the momentum of the largest and smallest marbles in various scenarios using the data provided in Data Table 2.

To calculate the momentum before and after collision using the provided data, follow these steps:

Step 1: Calculate the average time for the five trials of each setup.
Add the times of each trial, and divide the sum by the number of trials (5). Record the average time in Data Table 2.

Step 2: Calculate the velocity of each marble using the average time for each setup.
Use the equation: velocity (m/s) = distance (m) / average time (s). Record the velocity in Data Table 2 using correct significant figures.

Step 3: Calculate the momentum of each marble for each setup.
Use the equation: momentum (p) = mass (m, in kg) x velocity (v). To convert mass from grams to kilograms, use the conversion factor: 1 kg = 1000 g. Record the momentum in Data Table 2 using correct significant figures.

Step 4: Calculate the total momentum of each interaction before and after the collision.
Add the momentum of each marble involved in the interaction. Record the total momentum in Data Table 3.

Step 5: Calculate the percentage of momentum loss before and after the collision.
Use the equation: Percent Loss = (initial momentum - final momentum) x 100% / initial momentum. Record the percentage loss in Data Table 3.

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Both Frank Capra and John Ford, renowned filmmakers of the classical Hollywood era, had their own unique ways of interacting with the star system prevalent during that time.

1. Frank Capra:

Frank Capra was known for his directorial work on films that often focused on the common man and celebrated American values. He had a collaborative approach to working with stars, particularly his frequent collaborator Jimmy Stewart. Capra believed in creating a comfortable and supportive environment on set, allowing his actors to explore and bring their characters to life. He had a reputation for nurturing the talents of his actors and enabling them to deliver memorable performances.

2. John Ford:

John Ford, a highly influential filmmaker known for his Westerns and sweeping epics, had a different style of interaction with the star system. Ford had a long-standing collaboration with actor John Wayne, who became synonymous with his films. Wayne's rugged, masculine persona was frequently featured in Ford's Westerns, such as "Stagecoach" and "The Searchers."

Both Capra and Ford recognized the significance of stars in their films, using them as vehicles to connect with audiences. They employed different strategies to collaborate with their stars, whether it was Capra's nurturing approach or Ford's ability to harness and enhance their iconic qualities.

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