If the electric potential at point a is +30. 0 v , what is the electric potential at point b ?.

The speed of light in vacuum is 3 × 10⁸ m/s. If the refractive index of a transparent liquid is 4/3, then the speed of light in water will be 2.25 × 10⁸ m/s.

Refractive Index is a value calculated from the ratio of the speed of light in a vacuum to the speed of light in the second medium of greater density. The refractive index variable is most commonly symbolized by the letter n or n'.

R.I. of water = Speed of light in vacuum / speed of light in water

n' = 4/3

Speed of light in vacuum = 3 × 10⁸

n' = Speed of light in vacuum / speed of light in water

Speed of light in water = Speed of light in vacuum/ n'

Speed of light in water = 3 × 10⁸/ 4/3

Speed of light in water = 2.25 × 10⁸

Therefore, the speed of light in water medium will be 2.25 × 10⁸ m/s.

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The time is 5s.

In this problem, the observer is driving through town at

vi​ =16 m/s applies the brakes and begin decelerating with }a=−3.2 m/s²

We calculate the time for the vehicle to stop, and the speed after half the stopping time.

We use the velocity-time equation of the vehicle. When the vehicle stops, the velocity is

vf  ⟹ =vi +at

T = Vf−vi

= 0−16 m/s / −3.2 m/s²

= 5.0 s

What is time?

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The magnitude of the velocity of the horse will be 8.89 m/s.

Given, the mass of the horse is 900 kg and the momentum of the horse is 8000 Kgm/s.

To calculate, the velocity of the horse from the given values.

Momentum of any body is defined as the product of the mass of the body and the velocity of that body.                                         Momentum(p) = Mass(m) × Velocity(v)

Keeping the provided values in the formula, momentum = mass × velocity to calculate the velocity of the horse

8000 Kgm/s =  900Kg × velocity

velocity = 8000/900 m/s = 8.89 m/s

So, the velocity of the horse is 8.89 m/s.

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Answer:

bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Explanation:

The correct order of events to describe how the magnetic field forms around the Earth is: (1). The Earth's liquid iron outer core convects due to heat flow, creating electric currents. (2). The electric currents in the outer core generate a magnetic field. (3). The magnetic field lines extend from the Earth's interior out into space, creating the magnetosphere. (4). The magnetosphere deflects charged particles from the solar wind, protecting the Earth from harmful radiation.

A region of space where the magnetic forces of a magnet or a moving electric charge can be felt is called a magnetic field. Moving electric charges, such the spinning electrons in an atom or the electrons in a wire, create magnetic fields. They can also be created by the Earth's core or permanent magnets.

The strength and direction of magnetic fields define them. A magnetic field's direction can be determined by calculating the force it would apply to a compass's north pole. The amount of force that a magnetic field would apply to a charged particle travelling through the field provides an indication of its intensity.

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Answer: B

Explanation: The best answer is B. A baseball thrown by a professional pitcher. Momentum is the product of an object's mass and its velocity. Since the baseball has the greatest velocity of all the objects listed, it has the greatest momentum.

The drop distance is 23.7402 m

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

g = Acceleration due to gravity = 9.81 m/s² = a

Equation of motion

S = ut + ½ at²

S = 0 × t × ½ × 9.81 × 2.2²

S= 23.7402 m

The drop distance is23.7402 m

v = u + at

v = 0 + 9.81 × 2.2

v= 21. 582 m/s

When they hit the airbags at the bottom of the tower the speed of the experiments is 21.582 m/s

The final speed of the fall will be the initial velocity of stopping

v² - u² = 2as

a = v² - u²/ 2s

a= 310.521816 m/s²

The average stopping acceleration is 310.521816 m/s²

What is displacement?

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The energy lost due to friction is 0.49 J. And the speed of the bob passing through its lowest point will be 2.19 m/s.

The mass is 5 kg and the heights are h₁ 0.25 m and h₂ = 0.24. And the difference in the height is given as,

h₁ - h₂ = 0.25 - 0.24

h₁ - h₂ = 0.01

The energy loss due to friction is given as,

Energy loss = mgh₁ - mgh₂

Energy loss = mg (h₁ - h₂)

Energy loss = 5 x 9.8 x 0.01

Energy loss = 0.49 J

The energy lost due to friction is 0.49 J.

The velocity is given as,

KE = mgh₁ - E / 2

(1/2) x 5 x v² = 5 x 9.8 x 0.25 - 0.49 / 2

2.5v² = 12.25 - 0.245

v² = 4.802

v = 2.19 meters per second

The speed of the bob passing through its lowest point will be 2.19 m/s.

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Answer:

Answer:

Hugo de Vries

Explanation:

In the history of evolutionary biology, Hugo dr Vries is known as a proponent of the mutation theory of evolution, in which new species are believed to arise by single mutational events.

Uniform distribution of charge a) [tex]-1.752 * 10^(-17) C/m[/tex] b) [tex]-4.038 * 10^(-16) C/m^2[/tex] c)  [tex]-6.346 * 10^(-16) C/m^2[/tex] d) [tex]-4.580 * 10^(-13) C/m^3[/tex]

(a) To find the linear charge density along the arc, we divide total charge (-275e) by arc length. Arc length is product of radius (3.85 cm) by the angle (in radians) arc subtends. Convert angle to radians:

[tex]37 degree = (37/360) * 2\pi radians = 0.6435 radians[/tex]

The length of the arc is then:

length = radius x angle = (3.85 cm) x (0.6435) ≈ 2.477 cm

The linear charge density is then:

linear charge density = charge in total / length magnitude = (-275e) / (2.477 cm)

e: elementary charge.

Using charge value:

linear charge density = [tex]-1.752 * 10^(-17) C/m[/tex]

Therefore, linear charge density along the arc is [tex]-1.752 * 10^(-17) C/m.[/tex]

(b) To find the surface charge density over the face of the circular disk, we need to divide the total charge (-275e) by area of disk. Area of face of disk is [tex]\pi[/tex] times radius squared

area =[tex]\pi * (1.85 cm)^2 = 10.78 cm^2[/tex]

The surface charge density is then:

surface charge density = total value of charge / area magnitude = [tex](-275e) / (10.78 cm^2)[/tex]

e: elementary charge.

Using charge value:

surface charge density = [tex]-4.038 * 10^(-16) C/m^2[/tex]

Surface charge density over the face of the circular disk is  [tex]-4.038 * 10^(-16) C/m^2[/tex].

(c) To get surface charge density over sphere surface, we divide total charge (-275e) by sphere surface area:

surface area = [tex]4\pi * (radius)^2[/tex]

The surface charge density:

surface charge density = total charge / surface area =[tex](-275e) / [4\pi * (1.85 cm)^2][/tex]

where e is the elementary charge.

Use charge value:

surface charge density ≈ [tex]-6.346 * 10^(-16) C/m^2[/tex]

Surface charge density over sphere is[tex]-6.346 * 10^(-16) C/m^2.[/tex]

(d) To get volume charge density in the sphere, we divide the total charge (-275e) by the volume of the sphere.

volume = [tex](4/3)\pi * (radius)^3[/tex]

The volume charge density is then:

volume charge density = total charge / volume = [tex](-275e) / [(4/3)\pi * (1.85 cm)^3][/tex]

e: elementary charge

Using value of the elementary charge:

volume charge density = [tex]-4.580 * 10^(-13) C/m^3[/tex]

Therefore, the volume charge density in the sphere is [tex]-4.580 * 10^(-13) C/m^3[/tex]

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The resistance (slope of a curve) is about 490 so when bulb is lit. According to this model, the resistance was inversely proportional to temperature for materials (such this tungsten filament).200 ohms

The datasheet for such LED will include this information as well as the forward dc voltage. LEDs typically demand 10 to 20mA. For instance, a 9V battery powered ultra-bright blue LED has a forwards voltage or 3.2V and a typical current is 20mA. Thus, the resistor must be 290 ohms and as close to that value as is feasible.

Due to their relatively high resistance, alkaline, carbon-zinc, and the majority of primary batteries can only be used in low-current devices like flashlights, remotes, portable entertainment systems, and kitchen clocks. The resistance gets worse when these batteries run out of power.

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The spring stores 0.5 joules of elastic potential energy when stretched by 0.5 meters.

What is Potential Energy?

It is a form of energy that is stored in an object and has the potential to do work. The amount of potential energy depends on the position, shape, and orientation of the object. The most common types of potential energy are gravitational potential energy, elastic potential energy, and chemical potential energy.

The elastic potential energy stored by a spring is given by the formula:

Elastic potential energy = 1/2 * spring constant * (extension)^2

where the spring constant is measured in Newtons per meter (N/m), and the extension is measured in meters (m).

Given that the spring constant is 2 N/m and the extension is 0.5 m, we can plug these values into the formula:

Elastic potential energy = 1/2 * 2 N/m * (0.5 m)^2

= 0.5 J

Therefore, the spring stores 0.5 joules of elastic potential energy when stretched by 0.5 meters.

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Answer:

Explanation:

C. 113.5 Ns

The energy transformation that takes place when using a wind turbine to generate usable energy is mechanical-to-electrical.

This is done by converting the kinetic energy of the wind into mechanical energy, which then turns a generator to produce electrical energy. Then, residences and businesses can be powered by this electrical energy. Wind drives the rotor blades of contemporary wind turbines, which transform kinetic energy into rotational energy. Kinetic energy is a particular kind of power that can be present in a moving object or particle. An object can perform work, which involves the transfer of energy, by applying a net force. The effect is that the object accelerates and acquires kinetic energy. Aerodynamic force is used by the rotor blades of a wind turbine, which function similarly to an aeroplane wing or a helicopter rotor blade, to transform wind energy into electricity. The air pressure drops on one side of the blade as the wind passes across it.

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complete question: What is/are the energy transformation(s) that take place when using a wind turbine to generate usable energy?

A) friction- electrical

B) kinetic - mechanical - electrical

C) friction - mechanical - electrical

D) mechanical - friction - electrical

Answer:cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Explanation:

The x component of the center mass is 4.64 m.

The x component of the center mass is calculated by applying the following formula as shown below;

X_cm = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3),

where;

X_cm = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3)

X_cm = (7 x 0   + 1 x 5  + 10 x 6) / (7 + 1 + 6)

X_cm = 4.64 m

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The correct answer is : Planet X, because the sun pulls it with a greater force

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Answer: A A A !!!!  

Explanation: just did the test, got it right thx thx!!!

The distance over which the force was applied would be 10 meters.

The work done on an object is given by the product of the force applied and the distance over which it is applied. Therefore, we can use the formula:

Work = Force x Distance

We know that the force applied is 50 newtons, and the work done is 5.0 x 10^2 joules. We can rearrange the formula to solve for distance:

Distance = Work / Force

Substituting the values we know, we get:

Distance = (5.0 x 10^2 J) / 50 N

Distance = 10 meters

Therefore, the force of 50 newtons was applied over a distance of 10 meters to do 5.0 x 10^2 joules of work on the object.

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Answer:

the expanse or amount of space between two things, points, lines, anything in science or math.

DISTANCE...

Explanation:

Answer:

In a Newton's ring arrangement, the difference in the square of the diameters of successive rings is equal to four times the wavelength of light divided by the refractive index of the medium between the planoconvex lens and the plane glass plate.

If the wavelength of light is changed to 4.5 x 10-5 cm, then the difference in the square of the diameters of successive rings will be equal to four times 4.5 x 10-5 cm divided by the refractive index of the medium (which is assumed to be 1 if a liquid of refractive index 1.33 is not introduced).

If a liquid of refractive index 1.33 is introduced between the lens and the plate, then the difference in the square of the diameters of successive rings will be equal to four times 4.5 x 10-5 cm divided by 1.33.

If the radius of curvature of the convex surface of the plano-convex lens is doubled, then the difference in the square of the diameters of successive rings will remain the same.

After a workplace incident requiring first aid, is it beneficial to review the first aid response because:

1) The WHS Act and Regulations make it a legal duty.

2) That the initial responder/s were properly trained for the occurrence.

3) Verify the efficacy of the workplace's first aid strategy and risk management procedure.

A review of first aid occurrences may be required by the workplace health and safety (WHS) act and regulations to confirm that correct procedures and protocols were followed and to identify any areas for improvement.

Confirming that the first aider/s had the requisite training for the event is critical to ensuring that the appropriate steps were taken during the incident and that the first aider/s were equipped with the knowledge and abilities to respond correctly.

After an event, review the first aid response to confirm the success of the workplace's first aid strategy and risk management approach. This can aid in identifying areas for development and preparing the workplace for similar situations in the future. The study may involve assessing the availability and accessibility of first aid equipment and supplies, as well as first aid personnel response time.

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The electrons in copper (Cu) are loosely bound to the nucleus is the most accurate answer

explain about the copper ?

Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with high thermal and electrical conductivity. Copper has been used by humans for thousands of years for various purposes including coinage, electrical wiring, plumbing, and industrial machinery. It is commonly found in nature as copper oxide or copper sulfide, and it can be extracted through mining and refining processes. Copper is also an essential nutrient for all living organisms and plays important roles in biological processes such as the formation of red blood cells and the maintenance of the nervous and immune systems.

The electrons in copper (Cu) are loosely bound to the nucleus is the most accurate answer. This is because in metals like copper, the outermost electrons of atoms are not tightly bound to their respective nuclei, and can therefore move easily through the material, allowing for efficient conduction of electricity. On the other hand, in non-metal substances like carbon fiber, the electrons are more tightly bound to their respective nuclei, making it less efficient in conducting electricity.

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Answer:

(Question) Why is copper wire a better conductor of electricity than carbon fiber?

(Answer) The electrons in copper (Cu) are loosely bound to the nucleus

(Question) Which of the following best describes a direct current?

(Answer) An electrical current that flows in one direction

(Question) Which of the following substances would allow an electric current to flow through it easily?

(Answer) aluminum (Al)

(Question) Which of the following statements about electrical charges is true?

(Answer) Opposite charges attract one another

(Question) Which of the following statements best describes the relationship between atoms and conductivity?

(Answer) Atoms with a nearly empty valence shell make good conductors

Explanation:

i just finished the quick check

Because the charge densities per unit area on every plane are equal. Hence, the strength of the electric field around point P is the same in situations A and B.

Gauss' law can be used to determine the electric field of such an infinite line charge with such a uniform linear charge density.

The electric field is of equal strength at each point of a cylinder and thus is pointed outward when a Gaussian surface with radius r is modeled as a cylinder.

We discovered that electric field is radially oriented away as from line charge and that its strength decreases in inverse proportion to its distance.

Hence, the strength of the electric field around point P is the same in situations A and B.

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Answer:

F(Net) = F(a) + F(g) + F(f) + FN.

Answer: Smaller planets are easier to detect using the transit method.

Explanation:

The transit method is a technique for detecting exoplanets, or planets outside our solar system, by observing the periodic dimming of a star as a planet passes in front of it (transits). The size of the planet affects the amount of light that is blocked, and therefore the magnitude of the dimming.

Smaller planets block less light than larger planets, making it more difficult to detect the transit. However, smaller planets are more numerous, and their transits are more frequent and easier to observe. Additionally, smaller planets are more likely to be located in the habitable zone of their star, where conditions may be suitable for life.

Therefore, smaller planets are easier to detect using the transit method, as they cause a smaller but more frequent dimming of the star, making them easier to detect with current technology. The relative size of the planet does matter in the transit method, as smaller planets are easier to detect.

Answer:

larger planets (correct)

Explanation:

The acceleration is 2.7 m/s^2.

Acceleration is a measure of the rate at which an object changes its velocity. It is defined as the change in velocity per unit time and has units of meters per second squared (m/s^2). Acceleration can be positive (when an object is speeding up), negative (when it is slowing down), or zero (when its velocity is constant).

We can get the acceleration;

v^2 = u^2 - 2as

v = final velocity

u = initial velocity

a = acceleration

s = distance

Thus we have that;

v = 0 m/s thus;

u^2 = 2as

a = u^2/2s

a = (71.4)^2/2 * 939

a = 5097.96/1878

a = 2.7 m/s^2

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Answerbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Explanation:

A startled deer runs 520 m at 20.0° north of east for half a minute, then turns and runs 380 m at 55.0° north of west for 15.0 seconds and stops. Therefore, 60m/s is the average velocity of the deer during this time.

Motion may be defined using physical quantity concepts such as speed, velocity, duration, displacement, as well as acceleration. Sir Isaac Newton provided the correct explanation of motion.

All of these quantities are explained in terms of a single quantity, time. In this section, we will look at average velocity, its mathematical representation, and its graphical depiction.

average velocity =  520 m+  380 m / 15=60m/s

Therefore, 60m/s is the average velocity of the deer during this time.

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Answer:

Answer is in the attached photo.

Explanation:

The solution is in the attached photo, do take note the formula for linear collision:

m₁v₁i + m₂v₂i = m₁v₁f + m₂v₂f

where 'i' is the initial state and 'f' is the final state.

The therapeutic effects of heat include increasing the extensibility of collagen tissues; decreasing joint stiffness; reducing pain; relieving muscle spasms; reducing inflammation, edema, and aids in the post acute phase of healing; and increasing blood flow.

In the process of ATP production by cells throughout the body, approximately 60 percent of the energy produced is in the form of heat used to maintain body temperature. Thermoregulation is an example of negative feedback.

Why is heat used as a treatment during health care?

Heat treatments should be used for chronic conditions to help relax and loosen tissues, and to stimulate blood flow to the area. Heat is a great treatment option for chronic conditions caused from old injuries or even arthritis. Heat can be applied before participating in activities to help limber up.

So we can conclude that heat is one of the most important form of energy for our daily life.

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