A wave that can travel with or without a medium is called a(n)
A.surface wave
B.mechanical wave
C.electromagnetic
wave
D.all waves can travel
in any way

Answer:

B 23m/s

Explanation:

From the above information we get,

Initial velocity= 3m/s

Acceleration by gravity = 10 m/s2 (approx)

Time taken =2 seconds

v=u+at (First Equation Of Motion)

v= 3 + 10 × 2

v= 23 m/s

Answer:

Answer to the following answer is as follows;

Explanation:

In the northwestern city of Milan, Mussolini formed his nationalist regime in 1919. He organised black-shirted street warriors into teams. His "Blackshirts" raped and expelled socialists and communists from municipal administrations.

The Blackshirts, originally known as the Squadrismo, were formed in 1919 by a group of dissatisfied former soldiers.

The energy transferred as heat for a reversible isothermal expansion of an ideal gas at 132∘ C is 18,630 J.

We can use the relationship between heat, temperature, and entropy for an ideal gas undergoing a reversible process:

ΔS = Qrev/T

where ΔS is the change in entropy, Qrev is the heat transferred in a reversible process, and T is the temperature in Kelvin.

We can rearrange this equation to solve for Qrev:

Qrev = ΔS x T

Now we can plug in the given values:

ΔS = 46.0 J/K (given)

T = 132 + 273 = 405 K (since the temperature is given in Celsius, we add 273 to convert to Kelvin)

Qrev = 46.0 J/K x 405 K

Qrev = 18,630 J

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The erosive power increases as the velocity increases of the stream.

Power is the rate of job completion or energy delivery in science and engineering. It is denoted by the symbol W/t, which is the product of the amount of labor (W) or energy (E) transported divided by the amount of time (t).

Any given amount of work can be finished fast with a high-powered motor or slowly with a low-powered motor. Units of power, which measure work (or energy) per unit of time, include joules per second (or watts), ergs per second, and foot-pounds per minute.

For picking up material as opposed to carrying it in suspension, more velocity is required. The rate of erosion and velocity both rise during the peak discharge. Deposition and transportation are barely separated. It follows that merely a slight drop in velocity causes sedimentation.

Therefore, the erosive power decreases as the velocity increases of the stream.

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The erosive power of a stream as velocity increases because no force of interaction between positive and neutral object.

Coulomb's law states that the electric force is directly proportional to the product of the charged objects.

The electric force is also inversely proportional to the square of the distance between the charges and is denoted below:

F= kq1q2/ r² (Newton)

where,

F=electric force

k=Coulomb constant

q1, q2=charges

r=distance of separation

So, here we know that when two objects are charged and placed at some distance "d" apart then the two objects will either attract or repel each other.

If the charges are of similar type then the two objects will repel while if the charges are of opposite nature then two objects will attract each other.

So here when a charge object is near the neutral then there is NO force between two objects.

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Answer:

here,

the mass of car , m = 800 kg

the initial speed of car , u = 100 mph

u = 44.7 m/s

time taken , t = 0.8 s

a)

the change in momentum of the car , dP = Pf - Pi

dP = m * 0 - m * u

dP = - 800 * 44.7 kg.m/s

dP = - 3.58 * 10^4 kg.m/s

b)

the average force exerted on the car , F = dP /t

F = - 3.58 * 10^4 /(0.8) N

F = - 4.47 * 10^4 N

c)

this force is exerted by road on the car

The average power of the engine is approximately 37.07273 kW.

To calculate the average power of the engine, we can use the equation: Power = (Change in kinetic energy) / (Time)

First, let's calculate the change in kinetic energy of the car. The initial velocity is 0 m/s, and the final velocity is 26 m/s.

Therefore, the change in velocity is:

Change in velocity = Final velocity - Initial velocity

                               = 26 m/s - 0 m/s

                               = 26 m/s

The mass of the car is given as 1200 kg.

Using this information, we can calculate the change in kinetic energy: Change in kinetic energy = (1/2) * mass * (Change in velocity)²

                                          = (1/2) * 1200 kg * (26 m/s)²

                                          = 1/2 * 1200 kg * 676 m²/s²

                                          = 1/2 * 1200 kg * 676 kg * m²/s²

                                          = 406800 kg * m²/s²

Now, let's calculate the time taken for the car to accelerate. The time given is 11 s.

Next, we can substitute the values into the power equation:

Power = (Change in kinetic energy) / (Time)

          = 406800 kg * m²/s² / 11 s

          = 37072.73 kg * m²/s³

Finally, let's convert the power from watts to kilowatts:

1 kW = 1000 W

Power in kilowatts = 37072.73 W / 1000

                               = 37.07273 kW

Therefore, the engine's typical output is about 37.07273 kW.

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The chemical reactions of decomposition and synthesis are opposite to each other.

In decomposition reaction, a chemical compound breaks apart or decomposes into two or more molecules. Generally, the decomposition reaction is represented as AB → A + B.

In this type of reaction, a final product or compound transforms into constituents or individual reactants and it is the reverse of synthesis reaction. It is also called chemical decomposition or chemical break down. For example CaCO3(s)→ CaO(s)+CO2(g) is a decomposition reaction.

On the contrary, in synthesis reaction individual reactants combine to form a chemical compound. For example CaO(s)+CO2(g) → CaCO3(s) is a synthesis reaction and is the reverse of decomposition reaction respectively.

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Friction is the force that acts on the opposite side of direction of force, thus it manages to decelerate an object, so it acts upward along the plane

Answer:

Period refers to the time that it takes to do something. ... The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

We see the right side of the moon illuminated when the moon is waxing.

The Moon is in the Waxing Crescent phase when its western edge is bright but the majority of the surface that can be seen from Earth is dark. Waxing refers to the fact that the amount of light visible during this phase increases day by day.

The Earth's moon cycle has four phases, to start. A new moon, first quarter, third quarter, and full moon are among them.

There are 29.5 days in a lunar cycle. The moon completes one orbit of the Earth in around 27.3 days. Given that the Earth has travelled around 45 million miles during the time it takes the moon to complete one full orbit around the Earth, the 2.2-day delay is effectively the moon "catching up" to the Earth.

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Answer:5250 N

Explanation: ig:iihoop.vince

The force of friction between the car's tires and the road is 5250 N

Centripetal force is the force that is perpendicular to an object moving in circular motion. It is given by:

F = mv²/r

where m is the mass of object, v is the velocity and r is the radius of circle.

Given that m = 700 kg, v = 30 m/s, r = 120 m, hence:

F = mv²/r = 700 * 30²/120 = 5250 N

The force of friction between the car's tires and the road is 5250 N

Answer:

increases

Explanation:

Answer:

increases

Explanation:

Answer:

the net force /resultant force is 0N

Explanation:

this is because newton's first law states that when there was no resultant force, the object will continue in its state of rest or uniform motion in a straight line.

as a result, the box is at rest. this the net for certain which is the resultant force is 0N, this doesn't mean that there is no force, it is just that the total force (after subtracting) is 0N

hope this helps,

Answer:

Known as the “plica semilunaris,” it's much more prominent in birds and a few mammals, and functions like a windshield wiper to keep dust and debris out of their eyes. But in humans, it doesn't work. It's vestigial, meaning it no longer serves its original purpose.

Explanation:

Hope it helps

Answer:

False

Explanation:

This is due to the gravitational pull, since the moon does not have the same force or gravity like Earth, your weight would change.

☆anvipatel77☆

•Expert•

Brainly Community Contributor

The area of the given rectangular piece of plastic is 99900 square millimeters.

In mathematics, a rectangle is a shape with 4 straight sides, 4 right angles, and opposing sides of equal length. Each angle of the rectangle is a right angle, which means that it measures 90 degrees. A rectangle has two diagonals that are congruent, bisecting each other. A rectangle has opposite sides that are parallel and equal in length. In general, the formula for finding the area of a rectangle is given as A = l x w, where A is the area, l is the length, and w is the width. In the given question, the piece of plastic is originally rectangular, and suppose that a = 270 mm and b = 370 mm. Therefore, the area of the rectangular plastic is calculated as follows ; A = 270 mm × 370 mm.A = 99900 mm².In the above calculations, the area of the rectangle is 99900 square millimeters.

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Answer: 45.4249

Explanation: 12 gallons converted to liters = 45.4249 liters

Answer:45.42

Explanation:

1 Gallon = 3.785 liters

3.785 × 12 = 45.42

~ItsOniiSama<3

Hope this helps

Answer: Will not accelerate.

Explanation: When all the forces acting upon an object balance each other, the object will be at equilibrium; it will not accelerate.

Answer:

1.51783893986

Explanation:

One kilogram is equal to 9.81 Newtons

You have 14.89N, divide this by 9.81 and u get the mass in  KG

so u do 14.89/9.81 = 1.51783893986 or 1.52kg (2dp)

Bonjour à toi,

An electrically neutral object does not mean that it has no electrical charge. If today we find some elementary particles without electric charge (Higgs Boson, photon and gluon), the neutrality of the atom and molecules, or more globally of matter is due to various processes. An atom is electrically neutral because the electric charges that compose it compensate each other (as much negative charge, the electron, as positive, the proton). Ionic molecules arrange themselves so that the electric charges that compose them compensate each other.

According to Ohm's law: V = IR

The rate of flow of charges will depend on the voltage supplied and the resistance in the wire.

ELECTRIC CHARGE

Current can be defined as the rate of flow of charges. Where charge is the product of current and time. This means that electric charge is proportional to electric current. The current in a conducting wire depends on;

The two factors that can affect the flow of electric charge in the given options are voltage and resistance

Because according to Ohm's law: V = IR

The rate of flow of charges will depend on the voltage supplied and the resistance in the wire.

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Answer:

A. and D.

Explanation: Identifying Factors That Affect Current

Which factors affect the flow of electric charge? Select two options.

[voltage]

ampere X

ohmX

[resistance]

volt X

If the ice extended right around the earth, forming a loop that the puck could go around in circles, the puck would not keep going forever. The laws of physics would eventually cause the puck to come to a stop. This is because of two factors: air resistance and gravity.

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We have that for the Question "In the same year, the average finishing time for U.S. women was 4 hours and 41 minutes. What was the average female speed in miles per hour?" it can be said that

The average female speed in miles per hour

\(V_a=\frac{D}{4.683hours}\)

From the question we are told

In the same year, the average finishing time for U.S. women was 4 hours and 41 minutes. What was the average female speed in miles per hour?

This is defined as the collective mean of different travel intervals

Generally the equation for Speed   is mathematically given as

V=\frac{Distance}{Time}

Therefore

For  4 hours and 41 minutes=4.683hours

This travels time was obtained over a  series of distance

Hence

Distance D

The average female speed in miles per hour

\(V_a=\frac{D}{4.683hours}\)

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The spring-like property that returns a muscle to its original length after a contraction ends is known as muscle elasticity. When a muscle contracts, it generates force and shortens in length. This contraction is achieved by the sliding of actin and myosin filaments within the muscle fibers.

However, once the contraction is over and the force is no longer applied, the muscle has the remarkable ability to return to its original length.

Muscle elasticity is attributed to two main factors: the structural arrangement of proteins within the muscle fibers and the connective tissue surrounding the muscle.

The proteins act as molecular springs that can be stretched and then recoil back to their original position when the force is released. This property allows the muscle to efficiently generate and transmit forces during movement.

Additionally, the connective tissue, such as tendons and fascia, surrounding the muscle acts as a supportive framework. It stores and releases energy during muscle contractions, assisting in the recoil and restoration of the muscle's original length.

Overall, muscle elasticity is essential for the proper functioning of our musculoskeletal system, allowing us to move efficiently and smoothly while maintaining the integrity of our muscles.

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Given that the focal length of the object is F = 2.5 cm.

We have to find the position of the object such that no image is formed.

For a convex lens, the image will not be formed if it is placed at the focus.

Thus, the object should be placed at 2.5 cm as it is the focal length.

Answer:

200 ms-1

Explanation:

v = u+ at

v = 50+ 5×30

v = 200 ms-1

Explanation:

a ball is throw horizontally from the two a building and it taks a see for it to hit ground find

A/the intial horizontal component velocity

B/the height of the building

C/final velocity of ball just before landing all the ground

Yes, energy is transferred during this procedure. The wave pulse transports energy through the slinky by compressing and stretching the coils.

As the wave pulse travels, it transfers energy from one end of the slinky to the other, even though the slinky itself does not change its overall position. This is an example of wave energy being transferred through a medium without the medium itself being transported.

Yes, a transfer of energy takes place in this process. The wave pulse carries energy through the slinky by compressing and expanding the coils of the slinky.

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The speed of the moving train is approximately 33.5 m/s.

The beat frequency is given by the difference in frequency between the two horns, which is equal to the Doppler shift in frequency due to the motion of the moving train. Using the formula for the Doppler effect, we can solve for the speed of the train:

\(f_b = f_s\dfrac{(v + v_o)}{(v + v_s)}\)

where \(f_b\) is the beat frequency, \(f_s\) is the horn frequency, v is the speed of sound, \(v_o\) is the observer's speed, and \(v_s\) is the speed of the source.

We know that \(f_s\) = 410 Hz and \(f_b\) = 35 Hz. The speed of sound in air at standard temperature and pressure is approximately 343 m/s. Since the observer is stationary, \(v_o\) = 0.

Solving for \(v_s\), we get:

\(v_s = \dfrac{(f_s + f_b)}{f_s - 1} \times v\)

\(v_s\) = ((410 Hz + 35 Hz) / 410 Hz - 1) * 343 m/s

\(v_s\) = 33.5 m/s

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