Which process is accompanied by a decrease in entropy for the system?
a. ethanol condenses
b. water evaporates
c. dry ice sublimes
d. sodium chloride dissolves

Mugger and a victim meet on a dark street. The mugger previously decided whether to bring a gun and, if he did, whether to show it during the robbery. If the mugger does not show a gun - either because he doesn't have one or has one and hides it- then the victim has to decide whether to resist.

The strategic form of this situation is shown below. Note that all payoffs have been specified, except for the mugger's payoff when he chooses to have a gun and show it.We know that there is a Nash Equilibrium in which the mugger randomizes over the two pure strategies gun, hide and no gun and the victim randomizes over resist and do not resist.

The mugger will have no incentive to change his strategy if the victim will not change his. So, let's first take a look at the victim's best response to the mugger's strategies.

Assume the mugger is going to bring a gun with probability x. If the mugger shows the gun, the victim will not resist because the payoff from resisting is -10, which is less than -5. If the mugger doesn't show the gun, then the victim will resist if his payoff from resisting is at least equal to his payoff from not resisting. That is, if:2p - 5(1 - p) ≥ 0The mugger will choose to show the gun if and only if his payoff from showing the gun is greater than his payoff from not showing the gun.

That is, if:3x + 5(1 - x) ≥ 0Simplifying this inequality: 8x - 5 ≥ 0x ≥ 5/8So, there is a Nash Equilibrium in which the mugger randomizes over the two pure strategies gun, hide and no gun and the victim randomizes over resist and do not resist, when x is greater than or equal to 5/8.

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To determine the density of the rock divide its mass by the volume. And for determining the volume use Archimedes' principle.

An object at rest in a liquid experiences an upward force, called buoyancy, equal to the weight of the liquid it displaces. When the body is completely submerged, the volume of liquid displaced equals the volume of the body.

For the given case:

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Answer:

t = 3.01 s

Explanation:

In order to calculate how long it takes to the object to fall to the ground, you use the following formula, for the calculation of the height:

\(y=y_o-v_ot-\frac{1}{2}gt^2\)    (1)

yo: height of the building = 105 m

vo: initial velocity of the body = 20m/s

g: gravitational acceleration = 9.8m/s^2

t: time = ?

To find the time t, you take into account that when the body arrives to the ground the height is zero, that is, y = 0.

You replace the values of all parameters in the equation (1), and you obtain a quadratic polynomial for t:

\(0=105-20t-\frac{1}{2}(9.8)t^2\\\\0=-4.9t^2-20t+105\)

Next, you use the quadratic formula to get the roots of the polynomial:

\(t_{1,2}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

a = -4.9

b = -20

c = 105

\(t_{1,2}=\frac{-(-20)\pm\sqrt{(-20)^2-4(-4.9)(105)}}{2(-4.9)}\\\\t_1=3.01s\\\\t_2=-7.09s\)

You choose the positive value t1, because it has physical meanning.

Hence, the body takes 3.01s to arrive to the ground

If you double a blackbody's temperature, its radiated power will increase by a factor of 16.

According to Stefan-Boltzmann's law, the radiated power of a blackbody is proportional to the fourth power of its temperature (T^4). Therefore, if you double a blackbody's temperature, its radiated power will increase by a factor of 2⁴ = 16. Doubling the temperature results in an increase in radiated power by a factor of 16 because the power is directly proportional to the fourth power of the temperature. This relationship highlights the significant impact that temperature has on the amount of radiation emitted by a blackbody.

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The liquid A is present lower in the container as compared to liquid B due to more weight.

If two liquids A and B of relative densities 0.7 and 0.4 respectively then the lower density liquid remain at the top and higher density solution which is liquid A remains lower in the container because higher density solution has more weight.

So we can conclude that the liquid A is present lower in the container as compared to liquid B due to more weight.

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When electricity moves through a metal wire, the wire is option B. A conductor.

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To solve this problem, we need the concepts of the virial theorem and the work energy theorem:

First, calculate the radial distance of the spacecraft in both the initial and final states. We use the virial theorem to calculate the total spacecraft energy in both the initial and final states. Finally, use the work energy law formula to calculate the work done by the plane.

The expression of total energy is written as,

E = -1/2 (GMm/r)

Work done, W = (-1.4477 ×\(10^{10}\)J) - (-1.9879 ×\(10^{10}\)J)

                         = 5402.0×\(10^{6}\)J

Therefore, The amount of the work done by the spacecraft is:

5402.0×\(10^{6}\)J

What is work done?

Every time a force moves something far away, work is done. Energy transferred or work done can be calculated by multiplying the force by the distance traveled in the direction of the force.

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No, resonance won't happen.

A process whereby an external force or a vibrating system causes another system nearby to vibrate more intensely at a particular operating frequency

Simple resonance is the occurrence of an oscillating force near one of an object's "natural" frequencies, where it is easily oscillating.

Many researches have discovered that the fundamental resonance frequency of the human complete body is approximately 5 Hz by measuring how the body reacts to vibrations.

In physics, amplitude refers to the greatest displacement or distance that a point on a vibrating body or wave can move relative to its equilibrium location.

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Answer:

1,800kg

Explanation:

Force = Mass x Acceleration

F = m x a

15840N = m x 8.8

8.8 x m = 15840

m = 15840/8.8

= 1,800kg

Answer:

\(\displaystyle 1800\:kg.\)

Explanation:

\(\displaystyle am = F_{net} \\ \\ \frac{15840}{8,8} = \frac{8,8m}{8,8} \\ \\ \boxed{1800 = m}\)

I am joyous to assist you at any time.

Answer:

9758 how many significant figures

Answer:

unbalanced and contact

Explanation:

The two terms that bests describes the net force acting on the sled is an unbalanced and contact force.

Force is a pull or push on a body. We have two main types of forces. Contact forces acts on a body and they must be in touch with it. An example is frictional force.

Non - contact forces acts based on force field and they are not in contact with the body. An example is gravitational force.

Therefore, the force on the wagon is an unbalanced and contact force.

Answer:

Pluto is no longer considered a planet as a result of it's small size on the IAU scale.

Explanation:

Answer:

1.) when it interacts with other electrons, decreasing its speed

Explanation:

2.) electric fields of particles with opposite charges

3.)Both electric and magnetic fields are applied. Particles need to be charged.

4.)Initial repulsion is high and increases as they approach.

5.)5.6×10^2 N

The correct options shown below,

1. When it interacts with other electrons, decreasing its speed

2. Electric fields of particles with opposite charges

3. Electric fields are applied. Particles need to come from the same type of atom.

4. Initial repulsion is high and increases as they approach.

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The correct answer is b. feeder.

In the context of electrical circuits, a feeder is a set of conductors that connect the service equipment, the source of a separately derived system, or other power supply source to the final branch-circuit overcurrent device. The feeder conductors supply power to multiple branch circuits and are protected by an overcurrent device located at the point where the feeder connects to the branch circuits.

On the other hand, a branch circuit is a set of conductors that originates at the final overcurrent device protecting the circuit and supplies power to outlets, lighting fixtures, or appliances. An outside branch circuit is a branch circuit that extends beyond the walls of a building or structure.

The National Electrical Code (NEC) defines the terms "feeder" and "branch circuit" and specifies the requirements for their installation, protection, and use. It is important to distinguish between feeders and branch circuits to ensure compliance with the NEC and to maintain a safe and reliable electrical system.

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The cross product of A and B is perpendicular to both A and B.

A × B = (4i + 2j + 2k) × (4i - 4j + 8k)

A × B = 16 (i × i) - 16 (i × j) + 32 (i × k) + 8 (j × i) - 8 (j × j) + 16 (j × k) + 8 (k × i) - 8 (k × j) + 16 (k × k)

A × B = -16 (i × j) - 32 (k × i) - 8 (i × j) + 16 (j × k) + 8 (k × i) + 8 (j × k)

A × B = -16k - 32j - 8k + 16i + 8j + 8i

A × B = 24i - 24j - 24k

The magnitude of A × B is

||A × B|| = 24 ||i - j - k|| = 24√3

Dividing A × B by its magnitude gives a unit vector,

(A × B)/||A × B|| = 1/√3 (i - j - k)

Answer:

12.6 s

Explanation:

y =  1/2 at^2

780.1 =  1/2 ( 9.81) t^2           answer can only have 3 s.d. due to the 9.81

t = 12.6 s

Awnser True:

Electric motors generate magnetic fields with electric current through a coil. The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor. Electric motors are used in all sorts of applications.

"The required velocity of car A relative to car B is calculated to be 90 i. There is no relative velocity component along the line connecting the two cars. The two cars are moving away from each other."

The speed of both the car is given as 45 m/s.

Let us suppose, north side and east side as positive y and x axis.

The velocity of the car A can be written as,

Va = 45 i

Vb = -45 i

The velocity of car A relative to car B is given as,

Vab = Va - Vb = 45 i - (- 45 i) = 90 i

There will be no relative velocity component along the line connecting the two cars as it is only along x-axis.

The two cars are moving away from each other and this can be said by observing their directions.

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Answer:

122.5 m

Bonus:

If it drop for 6 seconds = 176.4 which is not a lot but when you first look at it, it looks a lot

Graph A does.

The work you do to carry the ball up to the top of the cliff is the total energy it has.

Before you drop it, all that energy is potential energy.  

Once you drop it, the potential energy starts to turn into kinetic energy as it falls.  

When it hits the ground, its kinetic energy is exactly the amount of potential energy it had at the top, and it has no more potential energy.

The total (potential + kinetic) energy is the same amount all the way down. Energy isn't created or destroyed.

The graph that shows the ball's total energy and the elapsed time as the ball falls to the ground is graph A.

For a body that is falling from a height, the potential energy of the body is being converted to kinetic energy. We must note that the total mechanical energy of the body is constant.

As such, the graph that shows the ball's total energy and the elapsed time as the ball falls to the ground is graph A.

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Planets composed of rock and metal are found in the Terrestrial Solar System.

The Solar System is divided into two main types of planets based on their composition and characteristics: the Terrestrial Planets and the Jovian (or Gas Giant) Planets.

The Terrestrial Planets are located closer to the Sun and are characterized by their rocky and metallic compositions. These planets include Mercury, Venus, Earth, and Mars.

They have relatively high densities and solid surfaces. Their atmospheres, if present, are much thinner compared to the gas giants.

On the other hand, the Jovian Planets, also known as Gas Giants, are located farther from the Sun. These planets, namely Jupiter and Saturn, as well as the ice giants Uranus and Neptune, are composed primarily of hydrogen and helium gases.

They have low densities compared to the Terrestrial Planets and are characterized by thick atmospheres predominantly composed of hydrogen and helium.

Therefore, planets rich in low-density gases are found in the Jovian or Gas Giant part of the Solar System, while planets composed of rock and metal are found in the Terrestrial Solar System.

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The car's average acceleration during the 8.5-second test is approximately 3.3647 m/s².

To find the car's average acceleration during the 8.5-second test, we can use the formula:

Average acceleration = Change in velocity / Time taken

In this case, the change in velocity is from 0 m/s (starting at rest) to 28.6 m/s (final velocity). The time taken is 8.5 seconds, as given in the question.

Change in velocity = Final velocity - Initial velocity

                  = 28.6 m/s - 0 m/s

                  = 28.6 m/s

Average acceleration = Change in velocity / Time taken

                    = 28.6 m/s / 8.5 s

                    ≈ 3.3647 m/s²

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We cannot determine the speed at which a star in the galaxy is moving away from us based on its mass, luminosity, age, or color alone. it is false

The speed at which a star in the galaxy is moving away from us is determined through the measurement of its spectrum using a technique known as redshift.

When a star or galaxy moves away from us, its light is shifted towards longer wavelengths, resulting in a redshift. By analyzing the degree of redshift, astronomers can estimate the speed at which the star is receding.

However, factors such as mass, luminosity, age, and color do not provide direct information about the star's motion away from us.

These characteristics are important for studying other properties of stars, such as their composition, brightness, evolutionary stage, and temperature. To determine the motion of a star in the galaxy, redshift measurements are essential.

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Answer:

The answer is specific heat.

Explanation:

The amount of energy for 1 gram of a substance to be raised one degree is called specific heat because it involves energy and temperature going up.

Heat is a form of energy, so it is the most appropriate name.

I hope this helps! :)

The amount of heat required to increase the temperature of 1 gram of a substance by 1 degree Celsius (°C) is known as specific heat. Since water has a higher specific heat than other substances, it requires more energy to raise its temperature. Thus, option D is correct.

One gram of a substance's temperature can be raised by one degree Celsius by applying a certain amount of heat, or specific heat.

Calories or joules per gram per Celsius degree are typically used as the units of specific heat. One calorie (or 4.186 joules) per gram per degree Celsius, for instance, is the specific heat of water.

Specific heat is the quantity of energy required to raise a substance's temperature by one degree in order to raise a gram of it.

Therefore, Specific heat term is used to describe the amount of energy it takes for 1 gram of a substance to be raised one degree in temperature.

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Answer:

Photosynthesis is the process of using water, carbon dioxide and sunlight to produce sugar. The process of photosynthesis requires specialized cellular structures called chloroplasts to capture energy from the Sun and converted into chemical energy.

Explanation:

The number of mutations that will occur in the S.aureus population in foot wounds is 0.0336.

The natural habitat of S. aureus in humans is in the area of ​​the skin, nose, mouth, and large intestine, where under normal immune system conditions, S. aureus is not pathogenic (normal human microflora).

Bacterial genes can mutate quickly. These mutations can make bacteria reproduce faster, become stronger, and kill. The mutation can also be accelerated by the excessive use of antibiotics. As a result, bacteria also become more resistant to antibiotics.

Generations are produced in 12 hours:

12*60/30 = 24 generations.

Mutations in 1 generation are 0.0028.

Then the mutation after 12 hours is 12* 0.0028 = 0.0336

Your question is incomplete but most probably your full question was:

Staphylococcus aureus is a bacterium that can cause infections in broken skin. A single S. aureus cell gets into a wound on someone's foot. An S. aureus cell divides by binary fission approximately every 30 minutes. S. aureus has 2.8 x 106 base pairs in its genome. Mutations occur at a rate of 1 per 1010 base pairs per generation. Therefore, approximately 0.0028 mutations will occur per cell in the population. At the end of 12 hours, how many mutations will be present in the population of S. aureus in the wound on the foot?

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Answer:

This is because the 11 positive protons and 10 negative electrons end up with an overall charge of +1.

Explanation:

Answer:

One electron in it's outer shell