Which statement describes a switch in an electrical circuit?

Answer:

The temperature of the steam during the heat rejection process is 42.5°C

Explanation:

Given the data in the question;

the maximum temperature T\(_H\) in the cycle is twice the minimum absolute temperature T\(_L\) in the cycle

T\(_H\)  = 0.5T\(_L\)

now, we find the efficiency of the Carnot cycle engine

η\(_{th\) = 1 - T\(_L\)/T\(_H\)

η\(_{th\) = 1 - T\(_L\)/0.5T\(_L\)

η\(_{th\) = 0.5

the efficiency of the Carnot heat engine can be expressed as;

η\(_{th\) = 1 - W\(_{net\)/Q\(_H\)

where W\(_{net\) is net work done, Q\(_H\) is is the heat supplied

we substitute

0.5 = 60 / Q\(_H\)

Q\(_H\) = 60 / 0.5

Q\(_H\) = 120 kJ

Now, we apply the first law of thermodynamics to the system

W\(_{net\) = Q\(_H\) - Q\(_L\)

60 = 120 -  Q\(_L\)

Q\(_L\) = 60 kJ

now, the amount of heat rejection per kg of steam is;

q\(_L\) = Q\(_L\)/m

we substitute

q\(_L\) = 60/0.025

q\(_L\) = 2400 kJ/kg

which means for 1 kilogram of conversion of saturated vapor to saturated liquid , it takes 2400 kJ/kg of heat ( enthalpy of vaporization)

q\(_L\) = h\(_{fg\) = 2400 kJ/kg

now, at  h\(_{fg\)  = 2400 kJ/kg from saturated water tables;

T\(_L\) = 40 + ( 45 - 40 ) ( \(\frac{2400-2406.0}{2394.0-2406.0}\\}\) )

T\(_L\) = 40 + (5) × (0.5)

T\(_L\) = 40 + 2.5

T\(_L\) = 42.5°C  

Therefore, The temperature of the steam during the heat rejection process is 42.5°C  

Answer:

i think its D

Explanation:

Answer:

The highness or lowness of a sound is perceived as pitch. Pitch is a perceptual property of sound that allows us to distinguish between sounds that have the same loudness and duration, but differ in their frequency content. The pitch of a sound is determined by the frequency of the sound wave, with higher frequencies producing higher pitches and lower frequencies producing lower pitches. The pitch is what makes a sound distinguishable and is important in music, language, and communication.

Answer:

The position of the arrows will not be on the target i.e. outside the bull's eye, neither will they be close to one another (widely scattered).

Explanation:

Accuracy refers to the closeness of a measurement to an actual or accepted value while precision refers to the closeness of measurements to one another.

Using archery as an illustration of precision and accuracy, measurements (arrows) that are neither accurate not precise are those arrows that will be far away or outside the bull's eye region (target) of the board and also far apart from one another.

In a nutshell, the arrows will be distant from the bull's eye or target (not accurate) and also distant from one another (not precise).

Answer: he goes 1200 m/s

Explanation: because 1 minute is equal to 60 sconds and you have to multiply 20 times 60 so the answer is the car goes 1200 m

Answer:

BRAINLIEST PLEASE!!!!!

Explanation:

The maximum wavelength of light for the photoelectric emission of electrons from a material is determined by the material’s work function. The work function is the minimum amount of energy required to remove an electron from the material. This energy is provided by a photon of light, whose energy is given by E = hf, where h is Planck’s constant (6.626 x 10^-34 J.s) and f is the frequency of the light. The frequency and wavelength of light are related by the equation c = fλ, where c is the speed of light (3 x 10^8 m/s) and λ is the wavelength.

For tantalum, with a work function of 4.22 eV (1 eV = 1.602 x 10^-19 J), the maximum wavelength of light for photoelectric emission is given by:

λ = hc / (work function) = (6.626 x 10^-34 J.s)(3 x 10^8 m/s) / (4.22 eV)(1.602 x 10^-19 J/eV) ≈ 295 nm

For barium, with a work function of 2.50 eV, the maximum wavelength of light for photoelectric emission is given by:

λ = hc / (work function) = (6.626 x 10^-34 J.s)(3 x 10^8 m/s) / (2.50 eV)(1.602 x 10^-19 J/eV) ≈ 496 nm

So, the maximum wavelength of light for photoelectric emission of electrons from tantalum is approximately 295 nm and from barium is approximately 496 nm.

A source travelling in the direction of the observer causes Doppler blueshift.

When an object is moving towards us, the light from the object is known as blueshift.

The phrase refers to any relative motion, that causes a decrease in the wavelength and rise in frequency, including those that take place outside of the visible spectrum.

During the motion of the object towards us, blueshift will happen, thus shifting light to shorter wavelengths on the blue side of the spectrum.

This causes the color to shift from the red to the blue end of the spectrum in visible light.

To learn more about blueshift, click:

https://brainly.com/question/24175684

#SPJ1

Use a digital multimeter and disconnect the negative battery terminal when measuring resistance on a CANbus.

A multimeter, also called  volt-ohm-meter ( VOM ),is a handheld measuring instrument either analog or digital that can measure the  voltage, resistance, and current across circuits in a device.

When measuring resistance on a CANbus with the digital multimeter, it is  necessary to disconnect the negative  battery , This puts the power off. This is to ensure only the resistance is measured and prevent  other components'  from being measured and distorting readings.

Learn more on Multimeter here:https://brainly.com/question/5135212

According to the Vogt-Russell theorem, the structure of a star in hydrostatic and thermal equilibrium with all energy produced from nuclear processes is uniquely defined by its mass and chemical element distribution throughout its interior.

Despite being called a theorem, the Vogt-Russell theorem has never been officially proven. The theorem is named for the astronomers Heinrich Vogt and Henry Norris Russell, who separately devised it.

The Russell-Vogt Theorem, which states that the nature of a star is essentially entirely governed by its mass, age, and starting composition, explains why stars have such a well-defined brightness and temperature range while they are burning hydrogen in their interiors.

This trend is especially noticeable because the initial composition has little influence in comparison to the other two. The upper luminosity limit is caused by stars more massive than about 100 times the mass of the sun blowing themselves apart, while the lower luminosity limit is caused by objects less massive than about 0.08 times the mass of the sun failing to develop satisfactory pressure and temperature in their cores to burn hydrogen.

Learn more about thermal equilibrium:
https://brainly.com/question/14556352
#SPJ1

Answer:

simply because they all have direction

Explanation:

vector quantities are quantities which have both magnitude and direction.Force,acceleration and velocity have both magnitude and direction.

Answer: Temperature

Explanation:

These waves are traveling at the same speed.  The wave with the highest frequency is option C, "A wave frequency with line crossing in the middle."

For more such questions on waves, click on:

https://brainly.com/question/26116832

#SPJ8

The best, most helpful observation you can make is to LOOK steadily and squarely at the PICTURE of the stack.

For some nefarious reason, you decided to prevent us from doing that.

The weight of the rover vehicle on Earth, given that it weighs 37 N on Mars is 99.5 N

We'll begin by obtaining the mass of the rover vehicle. This is shown below:

Weight (W) = mass (m) × Acceleration due to gravity (g)

W = mg

Divide both sides by g

m = W /g

m = 37 / 3.72

m = 9.95 Kg

Now, we shall determin the weight of the rover vehicle on Earth. Details below:

Weight (W) = mass (m) × Acceleration due to gravity (g)

Weight (W) = 9.95 × 10

Weight = 99.5 N

Thus, we can conclude that the weight on Erath is 99.5 N

Learn more about weight:

https://brainly.com/question/22881705

#SPJ1

At 30°C, the rms speed of a sample of oxygen with a molar mass of 16 g/mol is approximately 482.34 m/s.

The root mean square (rms) speed of a gas molecule is a measure of the average speed of the gas particles in a sample. It can be calculated using the formula:

vrms = √(3kT/m)

Where:

vrms is the rms speed

k is the Boltzmann constant (1.38 x 10^-23 J/K)

T is the temperature in Kelvin

m is the molar mass of the gas in kilograms

To calculate the rms speed of oxygen at 30°C (303 Kelvin) with a molar mass of 16 g/mol, we need to convert the molar mass to kilograms by dividing it by 1000:

m = 16 g/mol = 0.016 kg/mol

Substituting the values into the formula, we have:

vrms = √((3 * 1.38 x 10^-23 J/K * 303 K) / (0.016 kg/mol))

Calculating this expression yields the rms speed of the oxygen sample:

vrms ≈ 482.34 m/s

For such more questions on speed

https://brainly.com/question/31380575

#SPJ8

Answer:

\(-3 m/s^{2}\)

Explanation:

Acceleration on a VT graph is the slope of the line at the given point. We can find the slope at 3 with Δy/Δx. This gives us (4-2)/(3-(-3)) which works out to be -3m/s^2

Answer:

An electrical component that can disconnect or connect the conducting path in an electrical circuit.

Answer:

\(V_1=2mL\)

Explanation:

Hello,

In this case, considering this as a dilution problem, the first step here is to consider that the moles of tetrodotoxin remains the same and just the volumes and concentrations are modified from the initial stock (1) and the required dilution (2):

\(V_1M_1=V_2M_2\)

Whereas V is referred to volume and M to molar concentration, in this case in mM. In such a way, solving the V1 as the volume of the 3-mM solution we obtain:

\(V_1=\frac{V_2M_2}{M_1} \\\\V_1=\frac{6mL*1mM}{3mM} \\\\V_1=2mL\)

It means you need 2 mL of the 3-mM solution.

Best regards.

Answer:

The characteristics that determine how easily two substances change temperature are:

The volume and density of the substances and the amount of time they are in contact do not directly affect how easily they change temperature.

Explanation:

At the end of the Electroweak era, matter and antimatter annihilate each other. Because of a small imbalance in the ratio, the universe is left with only matter.

The baryogenesis process refers to the hypothetical mechanism or mechanisms that generated the observed baryon asymmetry in the universe which refers to the fact that there is much more matter than antimatter

If the universe were perfectly symmetric between matter and antimatter the particles and antiparticles would have annihilated each other completely leaving behind only radiation.

Learn more about antimatter at

https://brainly.com/question/30004199

#SPJ1

Answer:

The first set of errors, which include friction and imperfect elasticity, are systematic errors because they arise from consistent factors that affect the measurements in a predictable way. These errors will be present in every trial of the experiment and will cause a consistent deviation from the true value.

The second set of errors, which include small amounts of friction and the initial velocity of glider 2, are also systematic errors because they arise from consistent factors that affect the measurements in a predictable way. These errors will also be present in every trial of the experiment and will cause a consistent deviation from the true value.

Explanation:

so this is the answer velocity =10√2

Answer:external

Explanation:EDGE 2021

Answer:

option b

Explanation:

........................

One of the most important inventions of the last century is the transistor, which was invented in 1947 by John Bardeen, Walter Brattain, and William Shockley at Bell Labs.

Transistor revolutionized electronics and enabled the development of modern computer. Transistors are tiny semiconductor devices that can amplify and switch electronic signals, and they have been essential components in development of almost all electronic devices, from radios and televisions to smartphones and laptops. According to their design, transistors can be divided into two categories: bipolar junction transistors (BJT) and field effect transistors. (FET).

The basis of a transistor's operation is the ability to modulate the intensity of a smaller current that is flowing through a second channel, which controls the flow of current through one channel.

To know more about transistor, refer

https://brainly.com/question/1426190

#SPJ1

Distance of moon from the earth will be around 384,400 Kilometers (239,000 miles) .

The angular size of the Moon in the sky, which is around half a degree, can be used to determine the distance to the Moon. With this knowledge and knowledge that the Moon's diameter is approximately 3,476 kilometers, we can apply the following formula to determine the angular size: Distance equals (Angular size / 2) tan((Moon diameter / 2)). This gives us a measurement of 384,400 kilometers (239,000 miles) as the distance between Earth and the Moon.

It's crucial to keep in mind that this is only an estimate, and the distance could change based on where the Moon is in its orbit around the Earth. It's also important to note that this distance is an average and that it varies over the month as a result of the Moon's eccentric orbit.

Learn more about Friction here

https://brainly.com/question/13000653

#SPJ4

Given:

The mass of the locomotive is m1 = 110000 kg

The initial speed of the locomotive is

The mass of the rail car is m2 = 25000 kg

The initial speed of the rail car is zero.

The radius of the wheel is r = 0.48 m

To find

The final velocity of the locomotive and the car.

The angular velocity after collision.

Explanation:

The final velocity can be calculated as

The angular velocity after the collision can be calculated as

Explanation:

The artificial satellite experiences a centripetal force \(F_c\) as it moves around the earth and it is defined as

\(F_c = m\dfrac{v^2}{r} = m\left(\dfrac{2\pi r}{T}\right)^2\left(\dfrac{1}{r}\right) = \dfrac{4\pi^2mr}{T^2}\)

where m is the mass of the satellite, r is its orbital radius and T is its orbital period. But we need to find the radius first.

Recall that the satellite is orbiting at a height where its acceleration due to gravity is 6.44 m/s^2. Since we know that the weight mg of the satellite is equal to the gravitational force \(F_G\) between the earth and the satellite, we can write

\(mg = F_G = G\dfrac{mM}{r^2}\)

\(\Rightarrow g = G\dfrac{M}{r^2}\)

where M is the mass of the earth (=\(5.972×10^{24}\:\text{kg}\)) and G is the universal gravitational constant (=\(6.674×10^{-11}\:\text{N-m}^2\text{/kg}\)). Plugging in the values, we find that the radius of the satellite's orbit is

\(r = \sqrt{\dfrac{GM}{g}} = \sqrt{\dfrac{(6.674×10^{-11}\:\text{N-m}^2\text{/kg})(5.972×10^{24}\:\text{kg})}{6.44\:\text{m/s}^2}}\)

\(\:\:\:\:\:= 7.87×10^6\:\text{m}\)

Now that we have the value for the radius, we can now calculate the orbital period T. Recall that the centripetal force is equal to the weight of the satellite at its orbital radius. Therefore,

\(F_c = mg \Rightarrow \dfrac{4\pi^2mr}{T^2} = mg\)

or

\(4\pi^2r = gT^2\)

Solving for T, we get

\(T^2 = \dfrac{4\pi^2r}{g} \Rightarrow T = \sqrt{\dfrac{4\pi^2r}{g}}\)

We can further simplify the above expression into

\(T = 2\pi\sqrt{\dfrac{r}{g}}\)

Plugging in the values for r and g, we get

\(T = 2\pi\sqrt{\dfrac{(7.87×10^6\:\text{m})}{(6.44\:\text{m/s}^2)}}\)

\(\:\:\:\:\:= 6945\:\text{s} = 1.93\:\text{hrs}\)

Answer:

the force happens on the wall and couch

Explanation:

she is using her arm strength to lift and hold