What is the change in internal energy (de) when a system is heated with 35 j of energy while it does 15 j of work?
a. +50 J b. -20 J
c. +20 J
d. +35 K
e. -50 J

The entropy can be calculated using the formula given below:S = k lnWHere, S is the entropy, k is the Boltzmann constant and W is the number of ways in which energy can be arranged in a system. To solve this problem, we will use the above formula for each object given in the table to calculate their entropies.

Calculation for object A- When there are 1.4e-20 joules of energy in object A, W = 122 from the table.

Using the formula, we get:S = k lnW= (1.38 × 10^-23) ln 122= 4.57 × 10^18 J/KT.

Therefore, the entropy of object A is 4.57 × 10^18 J/K.

Calculation for object B- When there are 4e-21 joules of energy in object B, W = 6 from the table.

Using the formula, we get:S = k lnW= (1.38 × 10^-23) ln 6= 1.22 × 10^18 J/K.

Therefore, the entropy of object B is 1.22 × 10^18 J/K.

Calculation for the combined system- When the two objects are placed in contact with each other, the total energy is the sum of the energies of object A and object B.

The number of ways to arrange this energy is the product of the number of ways to arrange energy in object A and object B (multiplication rule).WAB = WA × WB = 122 × 6 = 732.

Using the formula, we get:SAB = k lnWAB= (1.38 × 10^-23) ln 732= 5.79 × 10^18 J/KTherefore, the entropy of the combined system of objects A and B is 5.79 × 10^18 J/K.

Learn more about entropy here ;

https://brainly.com/question/20166134

#SPJ11

Answer:

Out of this, Area is not a fundamental physical quantity.

To find the current in the resistor, we can use Ohm's Law and the concept of equivalent resistance. Thus, option A is correct.

First, let's calculate the equivalent resistance of the three cells connected in parallel. When resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of the individual resistances:

1/Req = 1/R1 + 1/R2 + 1/R3

Given that R1 = R2 = R3 = 22 Ω (internal resistance of each cell), we can substitute the values:

1/Req = 1/22 + 1/22 + 1/22

1/Req = 3/22

Taking the reciprocal of both sides, we find:

Req = 22/3 Ω

Now we can use Ohm's Law to calculate the current (I) in the resistor. Ohm's Law states that the current flowing through a resistor is equal to the voltage across it divided by its resistance:

I = V/R

Given that V = 1.1 V (emf of each cell) and R = 32 Ω (resistance), we can substitute the values:

I = 1.1/32

Calculating this value, we find:

I ≈ 0.034375 A

Therefore, the current in the resistor is approximately 0.034375 A.

Learn more about current on:

https://brainly.com/question/15141911

#SPJ1

The first image shows a speed - time relation in which the speed is zero and the the object is not moving. The second graph shows a constant velocity and the third one shows an increasing velocity with time.

A speed - time graph represents the change in speed of an object with respect to the time. The speed can be increasing with time or decreasing. Speed of an object is dependent on the path through which it is moving and the mass, frictional force etc.

Here, the first image shows no no values for the y - axis and and thus, the image is not moving. The second graph shows a parallel line which is showing there is no change in speed with the time. This indicates that the object is moving with a constant speed.

The graph C plots an increasing speed with respect to time. The straight line diagonal to the x, y axis indicates the increasing speed.

Find more on speed- time graph;

https://brainly.com/question/12734584

#SPJ1

Given

m = 24kg

vi = 2 m/s

vf = 6 m/s

Procedure

Impulse = Change in momentum

The answer would be I = 96 kg*m/s

Therefore, the direction of their cross product A × B is vertically up, which is option 5: Vertically Up.

Given that the vector A points South and the vector B points West.

What is the direction of their cross product A × B?

We know that the cross product A × B is a vector perpendicular to both A and B. Also, the direction of the cross product is given by the right-hand rule.

Moreover, the right-hand rule is used to find the direction of the cross product.

This rule states that when the thumb, the index finger, and the middle finger of the right hand are oriented according to the first, second, and third vectors, respectively, the direction of the curled fingers represents the direction of the cross product.

to know more about vectors visit:

https://brainly.com/question/30958460

#SPJ11

Student 2 correctly describes the limiting reactant. In the balanced chemical equation provided (2Cu + O2 → 2CuO), the stoichiometric ratio between copper and oxygen is 2:1. This means that for every 2 moles of copper, 1 mole of oxygen is required for complete combustion.

In Student 1's response, they incorrectly state that the limiting reactant is copper because all the oxygen combusted and oxygen was still present in the room. However, the presence of oxygen in the room does not determine the limiting reactant.

In Student 3's response, they incorrectly state that the limiting reactant is copper because twice as much oxygen is needed compared to oxygen. This statement is confusing and does not accurately reflect the stoichiometric ratio in the balanced equation.

In Student 4's response, they incorrectly state that the limiting reactant cannot be determined because the number of moles of oxygen was not known. The limiting reactant can still be determined based on the stoichiometry of the balanced equation, even if the specific number of moles is not known.

learn more about oxygen  here:

https://brainly.com/question/31192093

#SPJ11

Answer:

1 meter for this wave

Explanation:

Amplitude is the height of the wave from the midline to the crest

The calculated value is 5.6 m. Much more frequently than sound intensities in watts per square meter, sound intensity levels are expressed in decibels (dB).

Both the scientific literature and the public media use decibels as their preferred measurement unit. The rationale behind this decision of units has to do with how we hear. Noise exposure is harmful to the hearing, and it is normal for musicians to suffer from hearing loss that is so severe that it affects their ability to play. Sound intensity, a term that applies to all noises, whether or not they are heard, is the pertinent physical quantity.

We are given Δp, so we can calculate I using the equation I=(Δp)22ρv . Using I , we can calculate β straight from its definition in β (dB)=10 log10(II0) β (dB)=10 log10(II0) .

Learn more about intensity here-

https://brainly.com/question/17583145

#SPJ4

Answer:

29.4 m/s

Explanation:

Using the formula: V=Vi + g.t

where V: final velocity, this is  what you want.

Vi: initial velocity, equals to zero as it is falling from rest.

g: acceleration due to gravity = 9.8

t: time, which equals 3 sec.

The test statistic (Z-score) is approximately 4.95.

To calculate the test statistic (Z-score) for this hypothesis test, we can use the formula:

Z = (sample mean - hypothesized population mean) / (standard deviation / sqrt(sample size))

Sample mean (X-bar) = 37

Hypothesized population mean (μ) = 30

Standard deviation (σ) = 8

Sample size (n) = 50

Substituting these values into the formula, we get:

Z = (37 - 30) / (8 / sqrt(50))

Z = 7 / (8 / 7.071)

Z = 7 / 1.414

Z = 4.95 (rounded to two decimal places)

A statistical hypothesis test is a technique for determining if the available data are sufficient to support a certain hypothesis. We can make probabilistic claims regarding population parameters using hypothesis testing.

To know more about hypothesis test

https://brainly.com/question/17099835

#SPJ11

The given statement “the predominant frequency of a certain fire engine's siren is 1410 hz when at rest.” is FALSE.

The statement suggests that the predominant frequency of a certain fire engine's siren is 1410 Hz when at rest.

However, this is not possible because when an object is at rest, there is no motion or vibration to generate a frequency.

When an object is at rest, there is no motion or vibration to generate any frequency.

The frequency of a siren or any sound source is a result of vibrations or oscillations produced by the object.

In the case of a fire engine's siren, the frequency of the sound it produces would only exist when the siren is activated and emitting sound waves.

Therefore, the frequency of the siren would not be 1410 Hz when the fire engine is at rest.

To know more about frequency, refer here:

https://brainly.com/question/32136311#

#SPJ11

Answer:

The Interpretation of Dreams": Freud noticed that dreams played an important role in his analysis of neurotic and "hysterical" patients. When he asked his patients to talk about whatever came into their minds, they often referred to their dreams, which would set off other associations and often illuminate other important connections in their past experience. It took Freud about two years to write the book, finishing it in September 1897.

Answer:

sẽ càng lớn

Explanation:

the critical angle for red light in diamond is 24.51°

critical angle for violet light in diamond is 24.01°.

given:

wavelength of red light λr =660nm

wavelength of violet light λv =410nm

refractive index for air=1

as the refractive index of red and violet colour in diamond is

Refractive index of red color nr= 2.407

Refractive index of violet color nv= 2.451

as it is mentioned that angle is critical angle,thus θr =90°

so,from Snell's law

n1sinθc=n2 sin 90°

Here,

n1 is the refractive index for incident medium

n2 is the refractive index for refractive medium

θc is the critical angle after which light starts reflecting internally

The critical angle for red light is here,n1=2.407, n2=1

n1sinθc=n2 sin 90°

2.407×sin θc=1×1

sin θc =(1/2.407)

θc=sin-1 0.415

θc=24.51°

Thus,the critical angle for red light in diamond is 24.51°

The critical angle for violet light is,

here,n1=2.451,n2=1

n1sinθc=n2 sin 90°

2.407×sin θc=1×1

sin θc= (1/2.451)

θc=sin-1 0.407

=24.01°

Thus,the critical angle for violet light in diamond is 24.01°.

learn more about Snell's law from here: https://brainly.com/question/2273464

#SPJ4

Answer:

When an unbalanced force acts on a body the side with the greater force's dircetion makes the object move along its direction

Also to find the net force acting on the bofldy you can subtract the two force acting on the body

In case of balanced force the net force will always be 0

Hello :)

Answer:

When an unbalanced force acts on an object, the side with the greater force's direction makes the object move along its direction. For example, when two cars collide on a head-on collision, both vehicles will move in the direction that the vehicle with the greater force is moving in.

Answer:

Photons

Explanation:

I just know

Discrete packets of kinetic energy in light are called photons. Photons are fundamental particles of light and electromagnetic radiation. The correct answer is photons.

Photons are fundamental particles of light and electromagnetic radiation. They carry energy in discrete quantities, known as quanta or packets, and exhibit both wave-like and particle-like properties.

The energy of a photon is directly proportional to its frequency, and inversely proportional to its wavelength. When light interacts with matter, it can transfer its energy to the particles it interacts with, leading to various phenomena such as absorption, reflection, and emission.

Therefore, Discrete packets of kinetic energy in light are called photons.

To know more about the photon:

https://brainly.com/question/34096290

#SPJ6

Complete question is;

An ideal pendulum is often discussed when studying simple harmonic motion.

What are the conditions needed for an ideal pendulum? Check all that apply.

1) Gravitational force acts to pull the pendulum’s mass down.

2) The mass of the rod of the pendulum is evenly distributed along the rod.

3) The pivot on which the pendulum swings is frictionless.

4) The pendulum swings through its equilibrium position as a result of inertia.

5) Tension acts downward on the pendulum’s mass

Answer:

Conditions 2,3 & 4 are the ones that apply

Explanation:

The conditions required for an ideal pendulum are;

- The mass of the rod of the pendulum has to be evenly distributed along the rod.

- Ensure that the pivot on which the pendulum is swinging is frictionless

-The pendulum has to swing through it's equilibrium position as a result of inertia.

Thus,the correct options are 2, 3, 4.

Answer:

Gravitational force acts to pull the pendulum’s mass down.

The pivot on which the pendulum swings is frictionless.

The pendulum swings through its equilibrium position as a result of inertia.

Explanation:

Just took the test

Answer:

Approximately \(0.21\; {\rm m}\).

(Assuming that \(g = 9.81\; {\rm m\cdot s^{-2}}\).)

Explanation:

As the bottle cap slows down, it lost kinetic energy \((\text{KE})\): \(\Delta \text{KE} = (1/2)\, m\, (u^{2} - v^{2})\), where \(m\) is the mass of the cap, \(v = 1.0\; {\rm m\cdot s^{-1}}\), and \(u = 2.0\; {\rm m\cdot s^{-1}}\).

The amount of kinetic energy lost should also be equal to the sum of:

Let \(d\) denote the distance that the cap has travelled along the ramp. The height of the cap would have increased by:

\(\Delta h = d\, \sin(\theta)\), where \(\theta = 20^{\circ}\) is the angle of elevation of the ramp.

The \(\text{GPE}\) of the cap would have increased by:

\(\Delta \text{GPE} = m\, g\, \Delta h = m\, g\, d\, \sin(\theta)\).

To find the friction on the cap, it will be necessary to find the normal force that the ramp exerts on the cap.

Let \(\theta = 20^{\circ}\) denote the angle of elevation of this ramp. Decompose the weight of the cap \(m\, g\) (where \(m\) is the mass of the cap) into two directions:

The normal force on the cap is entirely within the tangential direction.

Since the cap is moving along the ramp, there would be no motion in the tangential direction. Forces in the tangential direction should be balanced. Hence, the normal force on the cap will be equal in magnitude to the weight of the cap in the tangential direction: \(F_{\text{normal}} = m\, g\, \cos(\theta)\).

Since the cap is moving, multiply the normal force on the cap by the coefficient of kinetic friction \(\mu_{\text{k}}\) to find the friction \(f\) between the ramp and the cap:

\(f = \mu_{\text{k}}\, F_{\text{normal}}\).

After a distance of \(x\) along the ramp, friction would have done work of magnitude:

\(\begin{aligned} (\text{work}) &= f\, s \\ &= (\mu_{\text{k}}\, F_{\text{normal}})\, (d) \\ &= \mu_{\text{k}}\, m\, g\, \cos(\theta)\, d\end{aligned}\).

Overall:

\(\begin{aligned} \Delta \text{KE} &= \Delta \text{GPE} + \mu_{\text{k}}\, m\, g\, \cos(\theta)\, d \\ &= m\, g\, \sin(\theta)\, d + \mu_{\text{k}}\, m\, g\, \cos(\theta)\, d \\ &= m\, g\, (\sin(\theta) + \mu_{\text{k}}\, \cos(\theta))\, d\end{aligned}\).

At the same time:

\(\Delta \text{KE} = (1/2)\, m\, (v^{2} - u^{2})\).
Therefore:

\(\displaystyle \frac{1}{2}\, m\, (v^{2} - u^{2}) = m\, g\, (\sin(\theta) + \mu_{\text{k}}\, \cos(\theta))\, d\).

\(\begin{aligned}d &= \frac{m\, (u^{2} - v^{2})}{2\, m\, g\, (\sin(\theta) + \mu_{\text{k}}\, \cos(\theta))} \\ &= \frac{u^{2} - v^{2}}{2\, g\, (\sin(\theta) + \mu_{\text{k}}\, \cos(\theta))} \\ &= \frac{(2.0)^{2} - (1.0)^{2}}{2\, (9.81)\, (\sin(20^{\circ}) + 0.40\, \cos(20^{\circ}))}\; {\rm m} \\ &\approx0.21\; {\rm m}\end{aligned}\).

Answer:

seismic waves

Explanation:

i think thats the answer

Approximately three percent of solar radiation is used to power the water cycle. The water cycle is a continuous process where water evaporates from the surface of the earth, rises into the atmosphere, and then falls back to the earth as precipitation. This process is powered by the sun's energy, which heats the surface of the earth and causes water to evaporate.

In the water cycle, solar radiation is absorbed by the earth's surface, which warms the air and causes it to rise. As the air rises, it cools and the water vapor condenses into clouds. These clouds then release precipitation in the form of rain, snow, or hail.

While only three percent of solar radiation is used to power the water cycle, this process is crucial for the survival of all life on earth. Without the water cycle, there would be no precipitation, and the earth would become a barren wasteland. Therefore, it is important to understand and protect this vital natural process.

To know more about solar radiation visit :-

https://brainly.com/question/29537040

#SPJ11

The wavelength of the scattered radiation is approximately the same as the incident wavelength.

When X-rays pass through a material, they can scatter off the electrons within the material. This is known as Compton scattering. During this process, some of the energy of the X-rays is transferred to the electrons, causing them to move. As a result, the scattered X-rays have a longer wavelength than the incident X-rays.

The change in wavelength of the scattered X-rays can be calculated using the Compton formula:

Δλ = h/mc (1 - cosθ)

where Δλ is the change in wavelength, h is Planck's constant, m is the mass of the electron, c is the speed of light, and θ is the scattering angle.

In this problem, the incident X-rays have a wavelength of 0.0811 nm and scatter at an angle of 83.1 degrees. We can convert the angle to radians by multiplying by π/180:

θ = 83.1° × π/180 = 1.449 radians

Substituting the given values into the Compton formula, we get:

Δλ = (6.626 × 10⁻³⁴ J s)/(9.109 × 10⁻³¹ kg)(3 × 10⁸ m/s)(1 - cos 1.449)

Δλ ≈ 3.55 × 10⁻¹² m

The scattered wavelength is the sum of the incident wavelength and the change in wavelength:

λ' = λ + Δλ

λ' = 0.0811 nm + 3.55 × 10⁻¹²m.

λ' ≈ 0.0811 nm

Therefore, the wavelength of the scattered radiation is approximately the same as the incident wavelength.

Learn more about radiation at: https://brainly.com/question/9880742

#SPJ11

Answer: A. Objects 1 and 2 will not move, and objects 3 and 4 will accelerate upward.

Explanation:

Because objects 1 and 2 require more force in order to move, they will stay motionless.

Correct me if I am incorrect.

Answer : National Aeronautics and Space Administration

Problem : What does N.A.S.A stand for?

Explanation: NASA astronaut Christina Koch is pictured during a spacewalk. NASA stands for National Aeronautics and Space Administration. NASA was started on October 1, 1958, as a part of the United States government. NASA is in charge of U.S. science and technology that has to do with airplanes or space.

Hopefully this helps you!

The product among alcohol, gasoline, travel souvenirs, cigarettes that will have elastic demand is cigarettes.

Elastic demand refers to a situation in which a change in the price of a good or service results in a more significant change in the amount demanded. When the percentage change in quantity demanded is greater than the percentage change in price, the demand for the product is said to be elastic.

When the quantity demanded of a product decreases significantly when the price rises, the demand for the product is said to be elastic. Similarly, when a slight change in price causes a significant change in quantity demanded, the demand is said to be elastic. Conversely, if a product's price increases by a small percentage, and the demand for the product decreases by a smaller percentage, the demand for the product is said to be inelastic.

Cigarettes, of all the products listed above, are likely to have an elastic demand.

This is because smokers who are addicted to cigarettes are more likely to quit smoking or reduce their consumption in response to an increase in the price of cigarettes compared to the other goods.

Thus, a slight increase in the price of cigarettes is likely to cause a significant decrease in the number of cigarettes consumed.

learn more about elastic demand here

https://brainly.com/question/1048608

SPJ11

Answer:

Digestive System

Explanation:

Food is broken down by the digestive system to give energy to the cells of the body

Answer: Digestive System

Explanation:

Sputnik 1, the first man-made satellite, was released by the Eastern Bloc on October 4, 1957, as part of the Sputnik project, with Sergei Korolev serving as the program's primary designer.

There are a large number of satellite in use. They serve several functions, including the Satellite Navigation System, amateur radio, television transmission, and weather prediction. In order to conduct studies and acquire data, they also employ telescopes to gaze outwards at the solar system.

Natural and artificial satellite are two distinct categories. The Earth and the Moon are two examples of organic satellites. The Moon orbits the earth while the Earth revolves around the Sun.

To know more about satellite visit:

https://brainly.com/question/29849775

#SPJ4