a person takes a string that tied to a chair. he takes the other end and moves it up and down. which of the parts of the wave would be affected by the person's movement and how?question 44 options:c, the wavelength would get longer.d, the frequency would get higher.c and d, the amplitude and wavelength would increase.a, b and d. the amplitude and crest would be higher, while the trough would be lower.

For a refrigerant 134-a refrigerator, maintaining a refrigerated space at -10°C requires a specific evaporator pressure to achieve the desired cooling effect. In this case, we are asked to recommend between 0.12 or 0.14 MPa for the evaporator pressure and provide a justification for our choice.


Based on the refrigerant pressure-temperature chart for 134-a, we can see that the saturation temperature for -10°C is approximately -23.4°C. To achieve this temperature, we need to ensure that the evaporator pressure is below the corresponding saturation pressure for -23.4°C, which is 0.139 MPa. Therefore, a pressure of 0.12 MPa would be sufficient to maintain the refrigerated space at -10°C.

A refrigerant 134-a refrigerator that needs to maintain a refrigerated space at -10°C should have an evaporator pressure of 0.12 MPa. This pressure level is sufficient to achieve the desired temperature without risking damage to the system or compromising its efficiency and performance.

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Answer:

I believe that even though people experience different things, It is all about how they take it.

Explanation:

For example if two guys write an exam and get low scores, while one wallows in sadness, the other gets back up determined to do better. Its about the mindset.

Given:

The initial value of the current through the circuit is I.

To find:

The current through the circuit after the circuit is changed.

Explanation:

Let us assume that the total voltage supplied by the two batteries to the circuit is V.

And let us assume that the resistance of the bulb is R.

From Ohm's law, the voltage across the circuit is given by,

Thus the current will be,

When the two identical bulbs are connected, the total resistance of the circuit will be R+R=2R.

Thus from Ohm's law, the current through the resistance is given by,

On substituting the equation (i) in the above equation,

Final answer:

The current in the circuit after the circuit is changed is (1/2) I.

The temperature of the blue supergiant star would be hotter than the Sun.

We can determine this based on the concept of Wien's displacement law, which states that the wavelength of peak intensity emitted by a black body is inversely proportional to its temperature. The Sun, with its characteristic yellow-white light, has a temperature of approximately 5,500 degrees Celsius (5,773 Kelvin), which corresponds to a peak wavelength of around 500 nm. In comparison, the blue supergiant star emits high-intensity light with a wavelength of 400 nm, which is shorter than the Sun's peak wavelength. Since shorter wavelengths correspond to higher temperatures, the blue supergiant star must have a higher temperature than the Sun. These stars have surface temperatures typically exceeding 10,000 degrees Celsius (10,273 Kelvin) and can reach even higher temperatures, up to tens of thousands of degrees Celsius.

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Detonation of a fusion type hydrogen bomb is started by igniting a small fission bomb.

This creates a high temperature and pressure environment that triggers the fusion reaction of hydrogen isotopes.

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Answer:

d f(x) / dx = d (x^3 + 2 x^2 - 5) /dx = 3 x^2 + 4 x

(Use the rule for differentiation)

Answer:

3x² + 10x

hope it's helpful

The ability to see the world in three dimensions is called depth perception. It is the visual ability to perceive the relative distance of objects in space and to see them in three dimensions.

Depth perception is an important aspect of vision that allows us to accurately judge distances, perceive spatial relationships, and interact with our environment.

It is the result of the brain processing information from both eyes to create a single, three-dimensional image.

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Answer:

icon just off 7 power iconoclasts officially

Answer:

Ve respuesta abajo.

Explanation:

Para hacer esto, podemos asumir que la presión es constante, pues es un proceso adiabatico, por tanto se aplica la ley de Charles a presión constante:

V₁/T₁ = V₂/T₂    (1)

De ahí podemos despejar V₂, ya que conocemos las condiciones iniciales de temperatura y volúmen, y la temperatura final:

V₂ = V₁ T₂ / T₁   (2)

Las temperaturas deben estar en grados Kelvin, y solo es cuestión de sumarle 273 al valor de la temperatura dada en °C:

T₁ = 28 + 273 = 301 K

T₂ = -6 + 273 = 267 K

El volúmen podemos pasarlo a litros ahora o al final. En este caso, podemos dejarlo en m³ como está y luego pasarlo a Litros. Resolviendo tenemos:

V₂ = 0.4 * 267 / 301

Pasando este volumen a Litros, sabiendo que 1 m³ son 1000 L:

V₂ = 0.35482 * 1000

Finalmente para saber cuanto disminuyó el volumen en Litros, pasemos el volumen inicial a Litros y luego se hace la resta con el volumen final:

V₁ = 0.4 * 1000 = 400 L

V₁ - V₂ = 400 - 354.82

Esto es lo que disminuyó. Espero te ayude.

The importance of a studying anthropology to teenagers is that help them to know their roles in the society as well as teach them acceptable social behaviour.

Anthropology is the scientific study of human behaviour, culture and language, both in past and present human societies.

A study of anthropology helps to educate teenagers and help them see their roles in the society as well as them acceptable social behaviour.

Area of importance of anthropology include:

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Expla

pV/T=const goodluke

Answer:

D) Both parts are true.

Hey there, hope my answer helps :)

Answer: D) Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.

Answer:

True

Explanation:

The Gravitational potential energy is given by:

G = mgh

m = mass of body ; g = acceleration due to gravity ; h = height

G for a ball of mass 10kg ; height of 20 meters above the ground

G = 10kg * 9.8m/s² * 20m = 1960 kgm²/s²

G for a ball of mass 1000kg at height, 0 meters :

G = 1000 * 9.8 * 0 = 0

1960 > 0

Hence, Gravitational potential energy for 10kg ball at height 20m is greater Thammfor a 1000kg ball on the ground.

Answer:

It's C because if you were trying to put it at rest that means you would put it on a Balanced surfest

Answer:

remain at rest

Explanation:

An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.

In the case of Newton's first law of motion: An object that is nonmoving remains at rest (unless acted upon by an unbalanced force); and a moving object will continue in its motion at a constant velocity (unless acted upon by an unbalanced force).

Hope this helps! =)

The given scenario that best fits each of the following atmospheric energy transfer is given below:

Radiation: Important in the greenhouse effect

Convection: Warm all ming and cold air siniling convection

Advection: Energy taken from the environment when water molecules evaporate from the ocean surface

Latent Heat: Plays an important role in the global balance

Atmospheric energy refers to the kinetic energy (movement) or potential energy (position) possessed by the gases present in the Earth's atmosphere. This energy is distributed throughout the atmosphere through atmospheric circulation and weather patterns.

Atmospheric energy can be transferred through various mechanisms like radiation, conduction, and convection. Radiation is the transfer of energy through electromagnetic waves, while conduction is the transfer of energy through direct contact between two objects, and convection is the transfer of energy through the movement of fluids.

Atmospheric energy plays a significant role in global warming as it causes an increase in Earth's surface temperature. Greenhouse gases, which trap heat within the Earth's atmosphere, are the main culprit behind global warming. The increase in atmospheric energy causes an increase in the concentration of greenhouse gases, which causes further warming of the Earth's surface. This phenomenon is known as the greenhouse effect.

Complete Question

Match the scenario that best fits each of the following atmospheric energy transfer:

Radiation

Convection

Advection

Latent Heat

[Choose]

Important in the greenhouse effect

Warm all ming and cold air siniling convection

Energy taken from the environment when water molecules evaporate from the ocean surface

Plays an important role in the global energy balance

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Answer:

180 [J].

Explanation:

1) the required work [W] can be calculated as difference of the energy: W=E₂-E₁, where E₁=mgh₁ - the energy before lifting, E₂=mgh₂ - the energy after lifting;

2) W=mgh₂-mgh₁, where m - mass; g=10 [N/kg], h - height;

3) then the required work [W]:

W=mg*(h₂-h₁)=30*6=180 [J].

"the mass of the neutron is approximately equal to the mass of the proton plus electron" is FALSE.

Mass is the amount of matter in a substance or an object. The mass of a neutron is around the same as the mass of a proton. The mass of an electron is only 1/1836 of the mass of a proton or neutron.

The mass of a proton is 1.007276 atomic mass units (amu), while the mass of a neutron is 1.008665 amu. Therefore,  the mass of the neutron is not equal to the mass of the proton plus electron.

Mass is the amount of matter in a substance or an object. The mass of a neutron is around the same as the mass of a proton. The mass of an electron is only 1/1836 of the mass of a proton or neutron.

The mass of a proton is 1.007276 atomic mass units (amu), while the mass of a neutron is 1.008665 amu. Therefore,  the mass of the neutron is not equal to the mass of the proton plus electron.

Hence, the statement is false.

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Answer:

Harmonics are integer multiples of the fundamental frequency. For example, if the fundamental frequency is 50 Hz (also known as the first harmonic) then the second harmonic will be 100 Hz (50 * 2 = 100 Hz), the third harmonic will be 150 Hz (50 * 3 = 150 Hz), and so on

Explanation:

The two aspects of a force do scientists need to measure are magnitude and direction.

The force is defined as the external effort applied in the form of push or pull to cause the acceleration of a body.

Mathematically it is expressed as the product of mass and acceleration of an object.

Then, the standard expression for the force as per Newton's second law is given as,

F = ma

Here,

m is the mass of the body.

a is the magnitude of the acceleration of the body.

Also, force is a vector quantity that has significance for its magnitude as well as the direction.

So any sort of scientific analysis regarding the force needs its magnitude along with the direction of application.

Thus, we can conclude that the two aspects of a force do scientists need to measure are magnitude and direction.

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To find the heat energy exhausted per cycle for a refrigerator with a coefficient of performance of 6.00 and a compressor using 15.0 J of energy per cycle, you can follow these steps:

1. Determine the coefficient of performance (COP). The coefficient of performance for this refrigerator is given as 6.00.
2. Calculate the amount of heat absorbed from the refrigerated space (Q_cooling) using the formula: Q_cooling = COP * Work input. In this case, the Work input is 15.0 J, so Q_cooling = 6.00 * 15.0 J = 90.0 J.
3. Find the heat energy exhausted per cycle (Q_exhausted) using the energy conservation principle: Q_cooling + Work input = Q_exhausted. Substitute the values you've found: 90.0 J + 15.0 J = 105.0 J.
The heat energy exhausted per cycle for this refrigerator is 105.0 J.

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A math question that is written as one or more sentences and asks students to use their mathematical understanding to solve an issue from "real world" is known as a word problem.

One of the first applications of math that we encounter are word problems. Many grade school students find word problems to be the most stressful type of math problem. A great selection of word problems for each of the four fundamental math operations can be found on this page.

There are word problems for addition, subtraction, multiplication, and division. Each type of problem starts out simple and straightforward and progresses to require more complex reasoning—a skill that is required on many standardized tests. Along the way, students will encounter a variety of operations that call for them to determine the kind of story problem they must resolve.

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A trough on a transverse wave is to a rarefaction in a longitudinal wave.
In a transverse wave, the particles move perpendicular to the direction of the wave's motion. A crest is the highest point of the wave, while a trough is the lowest point.
In a longitudinal wave, the particles move parallel to the direction of the wave's motion. A compression is a region where particles are closely packed together, and a rarefaction is a region where particles are more spread out.
When comparing the two types of waves, a crest in a transverse wave corresponds to a compression in a longitudinal wave due to the increased particle density at that point.
Similarly, a trough in a transverse wave corresponds to a rarefaction in a longitudinal wave since the particles are less densely packed at that point.

So, the correct answer is B) a rarefaction.

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To a stationary observer, a man jogs east at 6 m/s and a woman jogs west at 2 m/s. From the man's frame of reference, the woman's velocity is 4 m/s.

Velocity is a term that defines that how much a particle covered the distance in a particular time. Velocity is a vector quantity. It can be measured in m/s or cm/s.

To calculate the velocity we are using the formula, Δv= v₁-v₂

Here we are given,

v₁= According to a stationary observer, velocity of a man=6 m/s East.

v₂=According to a stationary observer, velocity of a woman= 2 m/s West.

We have to calculate the woman's velocity, from the man's frame of reference=  Δv

Now we put the values in the above equation, we get

Δv= v₁-v₂

Or, Δv= 6-2

Or, Δv=4m/s.

According to the calculation we can say that, From the man's frame of reference, the woman's velocity is 4 m/s.

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Answer:

420000N

Explanation:

Given parameters:

Mass of the train  = 5.6 x 10⁵kg

Acceleration  = 0.75m/s²

Unknown:

Resultant force = ?

Solution:

According to newton's second law, force is the product of mass and acceleration;

   Force  = mass x acceleration

Resultant force that acts on the train is given below;

 Force  = 5.6 x 10⁵kg  x 0.75m/s²  = 420000N

Answer:

When I gently push the end of the ruler down then let go, I heart and feel a slight vibration from the ruler. When I push it down harder, I feel and hear the same thing, just at a more intense frequency.

—--------------------------------------------------------------------------------------------------------------

Dog Barking

Timer

Microwave

Voice

Knocking on door

Car Coming Down Driveway

Typing

Foot Steps

Mouse clicking

Breathing

These were mostly easy except thinking of the last few were a little harder, it wasn't hard to organize them because I just had to think of the intensity of the sounds and rank them from loudest to softest.

Explanation:

Hope this helps!

(1) Ruler Experiment and Explanation: You may make a faint sound by allowing the ruler to vibrate while you slowly lower the end of the ruler over the edge of a table. Changes in the sound's energy, amplitude, intensity, and decibel level are what cause the difference:

Energy: Injecting additional energy into the ruler by pulling it more firmly. The ruler vibrates more as a result of the increased energy, which increases the number of sound waves produced.

Amplitude: The largest displacement of an object, while it is vibrating, is referred to as its amplitude. Higher sound waves are produced when the pull is stronger, since this causes greater vibrations with a higher amplitude.

Intensity: The amount of energy that sound waves carry per unit area is known as their intensity. A stronger draw causes more energy to be transferred to the air, boosting the sound's volume.

Decibel (dB):  unit is used to measure the strength of sound. The sound gets louder and the decibel level rises as you pull the ruler further. Decibel measurements can be used to compare the two pulls' sound intensities.

Hence, due to energy, the ruler vibrates more, amplitude gives the displacement of the ruler, intensity is increased due to higher draw, and decibel measure, the strength of sound.

(2) Listening to Environmental Sounds

Depending on a person's knowledge of musical concepts and their capacity to discern between high and low frequencies, ranking sounds by pitch might be very simple or complex. Ten sounds are listed below, ranked from the highest pitch to the lowest pitch:

Whistle

Birds singing

dogs bark

Auto horn

Doorbell

musical note

music note

singing voice of a human

A drumbeat

a hefty item thudding

It could be difficult for someone who isn't used to recognizing frequency variances to rank sounds by pitch. Higher-pitched sounds are simpler to distinguish for people with musical training or a great sense of hearing. It might be more difficult for people who aren't as knowledgeable about musical details to distinguish between some sounds, especially if the pitch variances are slight.

Hence, it could be difficult for someone who isn't used to recognizing frequency variances to rank sounds by pitch. Higher-pitched sounds are simpler to distinguish for people with musical training or a great sense of hearing.

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Answer:

0.2pascal

Explanation:

when the box is on the ground,

Then Force= weight

F=mg, which is

F= 30*10=300N

and also the area

Area= 50*30=1500cm^2

Therefore

Pressure =Force / Area

Pressure = 300/1500 = 3/15 =0.2pascal

Answer:

pyramid is a body or structure whose outer surfaces are triangular and converge to a first step at the the top which base may be in a shape of triangle ,rectangle,square and other any shape.

Explanation:

its volume is equal to product of area of base and height of it..

the lateral surface area of a regular pyramid is equal to the sum of the areas of its lateral faces.

the total surface area of a regular pyramid is equal to the sum of the lateral surface areas of pyramid and base.

Answer:

hope it is helpful to you

Answer:

the velocity of the car is 30 m/s.

Explanation:

Given;

Centripetal force on the car, F = 900 N

mass of the car, m = 10 kg

diameter of the circular path, d = 20 m

radius of the circular path, r = 10 m

The velocity of the car is calculated as follows;

\(F = \frac{mv^2}{r} \\\\mv^2 = Fr\\\\v^2 = \frac{Fr}{m} \\\\v = \sqrt{\frac{900 \times 10}{10} } \\\\v = 30 \ m/s\)

Therefore, the velocity of the car is 30 m/s.

Answer:

In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.