if tossing 100 coins, how many ways (microstates) are there to get the three most likely macrostates of 49 heads and 51 tails, 50 heads and 50 tails, and 51 heads and 49 tails? (consult this table.)

The force exerted on the surface assuming that it bring the electron to rest  is -6.1 * 10^-16 N

The force exerted on the surface can be determined using the equation below:

Force = (incident current) * (change in kinetic energy) / (change in time)

The change in kinetic energy of each electron can be calculated as:

ΔKE = (1/2) * (mass of electron) * (final velocity^2 - initial velocity^2)

Since the electrons come to rest, the final velocity is 0. Hence the initial velocity can be calculated using the equation:

initial velocity = (2 * potential difference) / mass of electron

Therefore we calculate ΔKE and then find the force:

mass of electron = 9.1 * 10^-31 kg

potential difference = 5 kV = 5 * 10^3 V

time = 5 s

incident current = 50 * 10^-6 A

initial velocity = (2 * potential difference) / mass of electron = (2 * 5 * 10^3) / (9.1 * 10^-31) = 1.1 * 10^8 m/s

ΔKE = (1/2) * (mass of electron) * (0^2 - (1.1 * 10^8)^2) = -6.1 * 10^-19 J

Force = (incident current) * (ΔKE) / (time) = (50 * 10^-6) * (-6.1 * 10^-19) / (5) = -6.1 * 10^-16 N

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1a) Energy is absorbed, and the reaction is endothermic.

1b) The products have higher potential energy, the enthalpy change is positive, indicating an endothermic reaction.

1c) The peak of the potential energy diagram.

2a) The activation energy labeled as the difference between the reactants and the peak

2b) The activation energy can be determined by calculating the difference between the reactants.

2c) The enthalpy change can be calculated by finding the difference between the energy of the reactants and the energy of the products.

2d) The reaction is exothermic. In terms of the graph's shape.

3a) A decrease in potential energy as the products form.

3b)This indicates that a small amount of energy from the spark is needed to overcome the activation energy barrier

Part 1:

1a. To determine if the reaction is endothermic or exothermic, we need to analyze the potential energy diagram. If the products have lower potential energy than the reactants, it indicates that energy is released, and the reaction is exothermic. Conversely, if the products have higher potential energy than the reactants, it suggests that energy is absorbed, and the reaction is endothermic.

1b. The enthalpy change (ΔH) for the reaction can be calculated by comparing the potential energy of the products and the reactants. If the products have lower potential energy, the enthalpy change is negative, indicating an exothermic reaction. If the products have higher potential energy, the enthalpy change is positive, indicating an endothermic reaction.

1c. The activation energy (Ea) can be determined by examining the energy difference between the reactants' potential energy and the peak of the potential energy diagram.

Part 2:

2a. Since the energy of the reactants is 30 kJ, the energy of the products is 5 kJ, and the maximum energy of the system is 40 kJ, we can sketch a potential energy diagram with the reactants at 30 kJ, the products at 5 kJ, the activation energy labeled as the difference between the reactants and the peak, and the enthalpy change as the difference between the reactants and products.

2b. The activation energy can be determined by calculating the difference between the reactants' energy and the peak of the potential energy diagram.

2c. The enthalpy change can be calculated by finding the difference between the energy of the reactants and the energy of the products.

2d. Based on the energy values, if the energy of the products is lower than the energy of the reactants, the reaction is exothermic. In terms of the graph's shape, if the potential energy decreases from reactants to products, it indicates an exothermic reaction.

Part 3:

3a. The potential energy diagram for the striking and burning of a match can be sketched to show the initial potential energy of the reactants, a peak representing the activation energy, and a decrease in potential energy as the products form.

3b. The potential energy diagram would show an initial higher potential energy for the reactants, a peak representing the activation energy required for the reaction to occur, and a decrease in potential energy as the products form. This indicates that a small amount of energy from the spark is needed to overcome the activation energy barrier, leading to the release of a greater amount of energy during the burning process.

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If the universe were to suddenly begin shrinking rather than continuing to expand, it would have a significant effect on the cosmic microwave background radiation (CMB).

The CMB is the afterglow of the Big Bang and is observed as a nearly uniform background radiation in all directions. It is thought to have been emitted when the universe was about 380,000 years old and had cooled enough for neutral atoms to form.

If the universe were to suddenly begin shrinking, the photons in the CMB would lose energy as they travel through the contracting space. This would cause the CMB radiation to shift to shorter wavelengths, which is known as blue-shifting.

Therefore, the correct answer is B. It would blue-shift.

Answer: 63 m/s

Explanation: If wheel drops vertically, you can use

conservation of energy : Ep = Ek.  mgh = ½mv^2  and

solve v = √(2gh ) = √ (2·9.81 m/s²·200 m) = 62.6 m/s.

NOTE: wheel has also horizontal speed which was not mentioned here.

When a small rubber ball bounces off a larger, heavier basketball, the basketball will move slightly in the opposite direction, but it will move much slower than the rubber ball due to its larger mass.

According to Newton's third law of motion, every action has an equal and opposite reaction. In the case of the small rubber ball bouncing off the basketball, the rubber ball exerts a force on the basketball, and the basketball exerts an equal and opposite force back on the rubber ball.

As a result, the small rubber ball bounces back in the opposite direction, while the basketball experiences a force in the opposite direction.

The motion of the basketball after the small ball bounces back depends on the mass and velocity of the two objects. Since the basketball is much larger and heavier than the rubber ball, it will not move much, if at all.

In fact, if the rubber ball is light enough and bounces back with enough force, it may cause the basketball to move slightly in the opposite direction. However, the basketball will move much slower than the rubber ball due to its larger mass and slower acceleration.

In terms of direction, the basketball will move in the opposite direction of the rubber ball, as dictated by the conservation of momentum. Since the total momentum of the system before and after the collision must be conserved, the basketball will move in the opposite direction of the rubber ball to balance out the momentum.

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Explanation:

Graph A matches description 4 because the car is coming back.

Graph B matches description 3 because the speed of the car is decreasing.

Graph C matches the description 2 because the car is traveling at a constant rate.

Graph D matches the description 1 because the car is stopped.

A piece of metal adds 2090 Joules of heat to a glass of water.

The mass of the water is 100 grams.

How much will the temperature change?

The heat transferred from the metal to the glass of water is given by

Where m is the mass, C is the specific heat of water (4.18 J/gK), Q is the amount of heat, and △T is the change in the temperature of the water.

Re-arranging the above equation for △T

Substitute the given values into the above equation

Therefore, the temperature change will be 5 °C

2nd option is the correct answer.

Increasing the electrical current flowing through the wire in an electromagnet would have several effects on its magnetic properties.

Increased magnetic field strength: The magnetic field strength produced by an electromagnet is directly proportional to the current passing through the wire.

By increasing the electrical current, the magnetic field strength of the electromagnet would also increase. This means that the electromagnet would have a stronger magnetic pull and be able to attract or magnetize nearby magnetic materials more effectively.

Increased magnetic field range: As the current flowing through the wire increases, the magnetic field generated by the electromagnet expands and reaches a larger area. This means that the electromagnet's influence on magnetic objects in its vicinity would extend over a greater distance.

Increased lifting capacity: The force exerted by the electromagnet on magnetic materials is directly proportional to the magnetic field strength. By increasing the electrical current, the electromagnet's lifting capacity would also increase. It would be able to lift or hold larger and heavier magnetic objects.

Increased heat generation: Increasing the electrical current would result in a higher power dissipation in the wire, leading to increased heat generation. This is due to the Joule heating effect, where the resistance of the wire causes it to heat up as current passes through.

Therefore, it is important to ensure that the wire and the electromagnet are designed to handle the increased current and dissipate the generated heat to prevent overheating and damage.

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Answer: Areobic Resporation

Explanation; -Aerobic respiration is the process in living things that evolved as oxygen levels increased in earth's atmosphere.

By supplying the fundamental knowledge required to create new instruments and techniques for medical use, physics enhances our quality of life

From can openers, light bulbs, and mobile phones to muscles, lungs, and brains; from paintings, piccolos, and pirouettes to cameras, vehicles, and cathedrals; from earthquakes, tsunamis, and storms to quarks, DNA, and black holes, physics aids us in understanding the workings of the world around us.

The science of physics is the most fundamental and has many applications in contemporary technology. Because it makes it possible for smartphones, computers, televisions, watches, and many other modern technologies to function automatically, physics is crucial to modern technology.

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Answer:

a) h = 16.7 m

b) t = 3.4 s

c) d = 31.3 m

d) a = 5.42 m/s²

Explanation:

a) The maximum height can be calculated as follows:

\( V_{f_{y}}^{2} = V_{0_{y}}^{2} - 2gh \)

Where:

\(V_{f_{y}}\): is the final speed in "y" direction = 0 (for maximum height)  

\(V_{0_{y}}\): is the initial speed in "y" direction

h: is the maximum height

g: is the gravity = 9.81 m/s²

\(h = \frac{V_{0_{y}}sin(65)^{2}}{2g} = \frac{(20*sin(65))^{2}}{2*9.81} = 16.7 m\)

b) The time that will take for the girl to catch the ball is:

\( h_{f} = h_{0} + V_{0_{y}}*t - \frac{1}{2}gt^{2} \)

By solving the above equation for t we have:

\( t = \frac{2V_{0_{y}}}{g} = \frac{2*20*sin(65)}{9.81} = 3.70 s \)

Since the girl runs after the ball 0.30 s later the total time is:

\( t = 3.70 - 0.3 = 3.4 s \)

c) The distance in x can be found as follows:

\( x = V_{0_{x}}*t = 20*cos(65)*3.7 = 31.3 m \)

d) The acceleration of the girl is:

\( x_{f} = x_{0} + V_{0_{x}}*t + \frac{1}{2}at^{2} \)

By solving the above equation for "a" we have:

\( a = \frac{2*x_{f}}{t^{2}} = \frac{2*31.3}{(3.4)^{2}} = 5.42 m/s^{2} \)

I hope it helps you!

Answer:

What is the potential energy? PE= mghPE= hwKE= 1/2mv2

Answer:1960J

Explanation:

Because mammals are warm blooded.

1. The time taken for the object to reach the ground is 2.47 s

2. The speed with which the object will reach the ground is 26.206 m/s

1. How do I determine the time taken?

We can obtain the time taken for the object to reach the ground as      follow:

h = ½gt²

30 = ½ × 9.8 × t²

30 = 4.9 × t²

Divide both side by 4.905

t² = 30 / 4.9

Take the square root of both side

t = √(30 / 4.9)

t = 2.47 s

Thus, the time taken to reach the ground is 2.47 s

2. How do i determine the speed?

The speed the object will use to reach the ground can be obtained as follow:

v = u + gt

v = 2 + (9.8 × 2.47)

v = 2 + 24.206

v = 26.206 m/s

Thus, the speed is 26.206 m/s

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The mass of Car B is -6000 kg.

To solve this problem, we can apply the principle of conservation of momentum, which states that the total momentum before the collision is equal to the total momentum after the collision.

Therefore, we can write the equation for the conservation of momentum as:

(mass of Car A * velocity of Car A) + (mass of Car B * velocity of Car B) = (mass of Car A + mass of Car B) * velocity after collision

Let's substitute the given values into the equation:

(2000 kg * 10 m/s) + (mass of Car B * 0 m/s) = (2000 kg + mass of Car B) * (-5 m/s)

Simplifying the equation:

20000 kg*m/s = -5 m/s * (2000 kg + mass of Car B)

Dividing both sides by -5 m/s:

-4000 kg = 2000 kg + mass of Car B

Subtracting 2000 kg from both sides:

mass of Car B = -4000 kg - 2000 kg

mass of Car B = -6000 kg

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Based on the description provided, the diagram that correctly illustrates the movement of the ball from the child's perspective is C.

Considering the child is rotating and he or she catches the ball some seconds after throwing it, it can be concluded the trajectory is closed, which means the diagram should show the ball returning to the initial point.

Based on the above, diagrams A and B are not possible because the ball is not retruning to the child.

Considering the child is moving at a constant speed and in a defined circular area, it is expected the movement resembles a circle; however as the ball will be affected by a leftward force in case the child is moving clockwise the movement will not be exactly a circle. Based on the above, the best option is diagram C.

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Answer:

Explanation:

Sure, I'd be happy to help you with the question!

Let's denote the input as x. According to the function machine, the input is multiplied by 6 and then 80 is subtracted from the result to obtain the output.

So, the function can be written as:

Output = (6 * x) - 80

Now, the problem states that the input is the same as the output. Therefore, we can set up the equation:

x = (6 * x) - 80

Let's solve this equation to find the value of x:

x = 6x - 80

Subtracting 6x from both sides, we get:

x - 6x = -80

Combining like terms, we have:

-5x = -80

Dividing both sides by -5, we find:

x = (-80) / (-5)

Simplifying the expression, we have:

x = 16

Therefore, the input (x) that results in the input being the same as the output is 16.

To work out these types of questions, it's important to carefully read the instructions and understand the operations being performed in the function machine. Then, you can set up an equation with the input and output, and solve for the unknown value. Always double-check your solution to ensure it satisfies the given conditions of the problem.

Answer:

16

Explanation:

(x*6) - 80 = x

Multiply the parentheses

6x - 80 = x
Add 80 to each side to get
6x = x + 80
Subtract x from both sides to get
5x = 80
Divide both sides by 5
x = 16

Answer:

Gravity? is it multiple choice?

The correct answer for magnitude: _______, direction: ________ is: magnitude: 0, direction: none

The resultant force can be found by using the graphical method for vector addition.

First, we need to draw the vectors representing the four forces. Since each force has a magnitude of 12.0 lb, we can draw each vector with a length of 12.0 units. The directions of the vectors are north, south, east, and west, so we can draw them as follows:

North: 12.0 units

South: 12.0 units downward

East: 12.0 units to the right

West: 12.0 units to the left

Next, we need to add the vectors together to find the resultant force. Since the vectors are in opposite directions, they will cancel each other out. The north and south vectors will cancel each other out, and the east and west vectors will cancel each other out.

Therefore, the resultant force will have a magnitude of 0 and no direction.

magnitude: 0
direction: none

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Answer:

Current =,charge / time

Charge = e = 1.6E-19 coulombs

t = T time for 1 revolution  (period)

v = S / T = distance traveled in 1 revolution / time for 1 revolution

T = S / v = 2 pi * 4.76E-10 / 2.43E5 = 1.23E-14

I = Q / T = 1.6E-19 / 1.23E-14 = 1.30E-5

The length of wire whose resistivity is 3 x 10^-6ohm, and radius is 0.2 mm, with a given value of 15.552 resistance is 6.5268 m.

Given data: r = 0.2 mm = 0.2 x 10^-3m Resistivity = 3 x 10^-6 ohm R = 15.552 ohm

Formula Used: Resistivity (ρ) = (RA)/L

Where, R is resistance, A is the area of cross-section, L is the length of the wire.

Resistance (R) = ρ (L/A)

Multiplying A on both sides, we get

Resistance (R) x A = ρ L ... equation (1)

Area of the cross-section of a wire of radius (r) is given by, A = πr^2

where, π is a constant whose value is 3.14

Substituting the given values, we get

A = πr^2= π (0.2 x 10^-3m)^2= 1.2566 x 10^-7 m^2

Substituting the values of R, A and ρ in equation (1), we get

Length of wire (L) = (Resistance x Area) / Resistivity= (15.552 ohm x 1.2566 x 10^-7 m^2) / (3 x 10^-6 ohm)= 6.5268 m

Therefore, the length of wire whose resistivity is 3 x 10^-6ohm, and radius is 0.2 mm, with a given value of 15.552 resistance is 6.5268 m.

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Answer:

20 m away from you

Explanation:

After 4 seconds, dog will have moved 40 metres since 10×4=40
The dog will be 60-40 metres away from you. Which gives our answer of 20 m

Answer:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

Explanation:

Answer:

The graph of the velocity of an object in free fall would look like a straight line sloping downward. As the object falls, its velocity increases at a constant rate, so the graph of its velocity versus time will be a straight line with a negative slope. This is because acceleration due to gravity is a constant -9.8 meters per second squared, so the velocity of a free-falling object will increase by 9.8 meters per second every second.

Therefore, the graph that shows the change in velocity of an object in free fall is a straight line with a negative slope. Here is an example of such a graph:

Free Fall Velocity Graph

Answer:

2 amperes

Explanation:

V = IR

V/R = I

120 v / 60 ohms = 2 amps

Answer:

Answer:

Both sound and waves

Explanation:

Thank me later

The work that the electric force do on q₀ during its motion from A to B is + 0.792 J.

When an item is pushed across a specific distance by an external force, work is the quantity of energy that is transmitted to the object.

In the given problem, distance between q₀ and q is:

d₁ = √2 x 7.00 cm = 9.90 cm

The distance between q₀ and the charge q is:

d₂ = √2 x 7.00 cm = 9.90 cm

The electric force between two charges is given by Coulomb's law:

F = k × q₁× q₂ / r²

where k is the Coulomb constant, q₁ and q₂ are the charges, and r is the distance between them.

At point A, the electric force on q₀ due to the charge q is:

F1 = k × q₀ × q / d₁²

= (9.0 x 10⁹ N·m²/C²) × (-1.00 × 10⁻⁶C) × (7.00 × 10⁻⁶ C) / (9.90 x 10⁻² m)²

= -4.002 N

The negative sign indicates that the force is in the opposite direction to the displacement of q₀.

At point B, the electric force on q₀ due to the charge q is:

F2 = k × q₀ × q / d₂²

= (9.0 × 10⁹)× (-1.00 × 10⁻⁶) × (7.00 × 10⁻⁶) / (9.90 × 10⁻²)²

= -4.002 N

So, work done by a constant force:

W = F × d × cosθ

So the work done by the electric force on q₀ from A to B is:

W = F1 × d1 × cos(180) + F2 × d2 × cos(180) = (-4.002 N) × (9.90 × 10⁻² m) × (-1) + (-4.002 N) × (9.90 × 10⁻² m) × (-1) = 0.792 J

The positive value indicates that the work done by the electric force is in the direction opposite to the displacement of  q₀, which means that the electric force does negative work on q₀.

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The value of acceleration is 3 m/s2.

Our body makes every effort to open up our airways. When sneezing, the diaphragm, abdomen, vocal cord, and chest muscles all work together. As a result, the air leaving our lungs accelerates rapidly.

Change in velocity, Δv

Change in time, Δt

Note that

1 km = 1000 m

1 h = 3600 s

Therefore

Δv = (125,000 m/h)*(1/3600 h/s) = 3 m/s2.

Therefore, The value of acceleration is 3 m/s2.

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