how much energy is needed to place three charges, each are 2.0µc, at the corners of an equilateral triangle of side 2.0 cm?

Let the direction across the river be represented by the X axis, and the direction upstream be represented by the Y axis.

The current is flowing at 1.90mi/h downstream. Then, the vertical component of the velocity is -1.90mi/h and the horizontal component is 0.

Since Shena can row at a speed of 2.30mi/h with respect to the water and she heads upstream 25.0º from the direction straight across the river, then, the horizontal component of her velocity is given by:

Since the river is 1.20mi wide, divide 1.20mi over the horizontal component of the velocity to find the time that it takes for her to reach the other side:

Add the vertical component of the velocity of the boat with respect to the water and the velocity of the stream to find the resultant vertical component of the velocity of Sheena:

Multiply the vertical component of the net velocity by the time 0.5757...h to find the vertical displacement:

In order to go straight across, the vertical component of the velocity of the boat should compensate the velocity of the water.

Then:

Therefore, the answers are:

It takes 34.5 minutes for Sheena to cross the river.

She reaches the opposite bank 0.534 miles downstream.

In order to go straight across, she would have to head 55.7º upstream.

If you were to examine the profile of a typical river, you would probably find the fastest flowing water closer to the center or thalweg the deepest part of the channel.

This is because the water flowing along the center of the channel experiences the least amount of friction with the river bed and banks, allowing it to flow more rapidly compared to the water near the edges of the channel which experiences more friction.Experience refers to the accumulation of knowledge, skills, and understanding that an individual gains through their interactions with the world around them. It includes both conscious and unconscious perceptions of sensory information, as well as emotional, cognitive, and social responses to those perceptions.Experience can be divided into two main types: subjective experience and objective experience. Subjective experience refers to the individual's personal interpretation of events and their emotional and cognitive reactions to those events.

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The maximum speed of her brother as he swings is 5.04777 m/s.

Calculation:

conservation of energy

ΔPE = ΔKE

= mg (h₁-h₂) = 1/2= mv²

= v = √2g (h₁-h₂)

= V = √2x9·8 (0.34 - 1.08)

Vmax =  5.04777 m/s

Forces are influences that can change the movement of an object. A force can cause a mass to accelerate, thus changing its velocity. Forces can also be described intuitively by pushing or pulling. The word "force" has a precise meaning.

At this level, it is appropriate to describe the force as pushing or pulling. A force does not contain or have within an object. A force is applied from one object to another. The idea of ​​force is not limited to animate or inanimate objects.

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The maximum speed of her brother as he swings (her brother sits passively in the swing.) is 1.14 m/s

The gravitational potential energy of the brother increases as he is lifted to a higher height. This increase in gravitational potential energy is converted to kinetic energy (the energy of motion) as the brother swings back down and gains speed. The maximum speed will be reached when all of the gravitational potential energy has been converted to kinetic energy.

The change in gravitational potential energy can be calculated using the formula:

ΔE = mgh

where m is the mass of the brother, g is the acceleration due to gravity (9.8 m/s^2), and h is the change in height.

Plugging in the values, we get:

ΔE = mgh = (50 kg)(9.8 m/s^2)(1.08 m - 0.34 m) = 330.8 kg*m^2/s^2

The maximum kinetic energy of the brother can be calculated using the formula:

E = 1/2 * m * v^2

where m is the mass of the brother, and v is the velocity (speed).

To find the maximum speed, we set the kinetic energy equal to the change in gravitational potential energy and solve for v:

E = 330.8 kgm^2/s^2 = 1/2 * (50 kg) * v^2

v = √(2E/m)

= √(2(330.8 kgm^2/s^2)/(50 kg))

= √(66.16/50)

= √(1.3232)

= 1.14 m/s

Thus, the maximum speed of the brother as he swings is approximately 1.14 m/s.

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Answer:

If you change the number of neutrons in an atom, you get an isotope of the same element. The addition of a neutron can make an atom radioactive. When you change the number of protons in an atom, you will change the atom from one element to a different element.

Explanation:

The characteristics of the atomic nucleus allow to find the answer for the effect of the change of neutrons in an atoms is

A chemical element is made up of protons, neutrons and electrons; the first two are in the atomic nucleus and the electrons are in orbits around them.

The number of protons corresponds to the atomic number and its change changes the type of element.

The neutrons that are neutral charge together with protons form the mass of the atom, as neutrons are neutral if the number does not affect the type of atom, but if its atomic mass changes.

Elements with the same atomic number, but different atomic mass, different number of neutrons are called isotopes; in general all elements have isotopes, for example hydrogen has an isotope called deuterium that has a neutral and another radioactive isotope called tritium that has two neutrons.

In conclusion using the characteristics of the atomic nucleus we find the answer for the effect of the change of neutrons in an atoms is

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The power connector type that older drives (such as IDE or ATA drives) required was the Molex power connector.

The Molex connector is a 4-pin power connector that was commonly used to provide power to computer components such as hard drives, CD/DVD drives, and fans.

It was widely used on older power supplies and motherboards, but has since been largely replaced by newer connector types such as the SATA power connector and the 4-pin PWM fan connector.

The Molex power connector was named after the company that developed it, Molex Incorporated, and has been in use since the 1950s. It has a rectangular shape and uses friction to secure the connector to the component, which can sometimes require a bit of force to remove.

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Answer:

A. Two small objects hsgsggahahahahahshgsgegwfw

The average speed of the ball is 0.15 m/s.

The average speed of the ball can be calculated using the formula below.

This is the ratio of the total distance to the total time traveled by a body

From the question,

Substitute these values into equation 1

Hence, the average speed of the ball is 0.15 m/s.

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ANSWER

my answer is in the photo above

EXPLANATION

A solvent is a substance in which a solute dissolves and solvents are in most cases liquids while a solute is a substance that dissolves in a solute and in their especially solid in nature

Answer:

karishma tanna

Explanation:

it is correct

Karishma Tanna was declared as the winner.

The processes under chemical change are: cooking an egg, fireworks exploding, and rusting of a metal tool.

The processes under physical change are: melting ice, evaporating puddle of water, and dissolving of salt in water.

Given:

The following process:

To find:

The classify the processes in whether it does or does not produce a new substance.

Solution:

Chemical change, due to change in atomic arrangement egg get solidified on cooking, a new substance is formed.

Physical change, change in the state of matter is taking from solid to liquid, no new substance is formed.

Chemical change. formation of carbon dioxide gas and sound energy, anew substance formed

Physical change, change in the state of matter is taking from liquid to gas, no new substance is formed.

Chemical change, formation of oxides on the surface of the metal tool due to reaction between air and metal, a new substance is formed.

Physical change, ions of salt in the solid state are changing into aqueous ions with no formation of new substance, no new substance is formed.

The processes under chemical change are: cooking an egg, fireworks exploding, and rusting of a metal tool.

The processes under physical change are: melting ice, evaporating puddle of water, and dissolving of salt in water.

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Answer:

x =

\( - 15 \times \frac{ \sqrt{3} }{2} \frac{m}{s} \)

y = 7.5m/s

The radius of the cylinder is approximately 2.19 m, and the cylinder is experiencing a deceleration of approximately 1.86 m/s². Since the cylinder is decelerating and the force applied is less than the friction force, it is not slipping.

From the given information:

Mass of the cylinder, m = 5 kg

Moment of inertia of the cylinder, I = 12 kg·m²

Diameter of the cylinder, D = 0.5 m

Force applied, F = 25 N

Coefficient of friction, μ = 0.7

Radius of the cylinder, r = ?

To determine the radius (r) of the cylinder, we can use the relationship between moment of inertia (I) and mass (m) for a solid cylinder:

I = (1/2) * m * r²

Given I = 12 kg·m² and m = 5 kg, we can solve for r:

12 = (1/2) * 5 * r²

r² = 12 / (1/2) * 5

r² = 12 / 2.5

r² = 4.8

r ≈ √4.8

r ≈ 2.19 m

So, the radius of the cylinder is approximately 2.19 m.

Now, let's determine the acceleration of the cylinder. The force applied is given as F = 25 N. The friction force can be calculated using the equation:

Friction force = μ * Normal force

Since the cylinder is being pulled by the string, the normal force is equal to the weight of the cylinder, which is given by:

Weight = mass * acceleration due to gravity

Weight = m * g

Assuming a standard acceleration due to gravity of 9.8 m/s²:

Weight = 5 kg * 9.8 m/s² = 49 N

Friction force = μ * Normal force = μ * Weight = 0.7 * 49 N = 34.3 N

Now, we can calculate the net force acting on the cylinder:

Net force = Force applied - Friction force

Net force = 25 N - 34.3 N

Net force = -9.3 N

Since the net force is negative, indicating that the force applied is less than the friction force, the cylinder will experience a deceleration rather than acceleration. The magnitude of the deceleration can be calculated using Newton's second law:

Net force = mass * acceleration

-9.3 N = 5 kg * acceleration

acceleration = -9.3 N / 5 kg

acceleration = -1.86 m/s²

The negative sign indicates that the deceleration is in the opposite direction to the force applied, which means the cylinder is moving in the direction opposite to the applied force.

Hence, the radius of the cylinder is approximately 2.19 m, and the cylinder is experiencing a deceleration of approximately 1.86 m/s². Since the cylinder is decelerating and the force applied is less than the friction force, it is not slipping.

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Explanation:

The unit called decibel (dB) is used to indicate that this ratio is multiplied by 10. The sound intensity level is not the same as sound intensity—it tells you the level of the sound relative to a reference intensity rather than the actual intensity.

Given

The acceleration,

The time,

To find

The final speed

Explanation

Let the final speed be v.

Thus,

Conclusion

The velocity is 112 m/s.

An example of a project where an object with a high (k) value would be a benefit is one that has to do with the design of a rocket engine. Metals that have very high thermal conductivity are useful for building rocket engines. This is because of the amount of energy/heat that is required to be combusted by these parts to achieve a break from the earth's force field of gravity.

While engineering problems where having an object with a low (k) value would be a benefit is those that have to do with buildings. Buildings are made from concrete and brisk with have low thermal conductivity hence low

A k-value (also known as a k-factor or lambda value) is a measure of a material's thermal conductivity, or how quickly heat moves through it. It is a basic quality that is independent of material quantities.

Thermal conductivities of different building materials may be compared using k-values. This is often useful in determining the possibility of heat transmission between the inside and exterior of a structure.

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Answer:

N = 1471.5[N]

Explanation:

We must remember that anybody lying on a horizontal surface, the normal force is defined as the vector corresponding to the force of equal magnitude to the product of mass by gravity, but in the opposite direction to the vector of weight.

To calculate the magnitude of the normal force (equal to weight), we can perform the product of mass by gravity.

\(w =m*g\\\)

where:

w = weight [N] (units of Newtons)

m = mass = 150 [kg]

g = gravity acceleration = 9.81 [m/s²}

\(N=w\)

\(N=150*9.81\\N = 1471.5[N]\)

When the air near the freezer compartment is cooled, the transfer of thermal energy causes the air particles to lose kinetic energy.

When the air near the freezer compartment is cooled, the transfer of thermal energy causes the air particles to lose kinetic energy. As a result, the average motion of the air particles decreases, leading to a decrease in their temperature. Cooling is typically achieved by removing heat energy from the air, which results in a decrease in the thermal motion of the particles and a decrease in their overall energy level.

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Answer:

Quick, Efficient, Reliable, Safe and Continous

Answer:

Five advantages of electricity are :Advantages

It is transportable over long distances

It is silent

It can be used produce magnetic fields, which can be used to propel motors

It is very transformable

It is very fast, virtually the speed of light

It can be used to produce other forms of radiant energy, such as radio waves, microwaves, radiant heat and light

Answer:

chloroplast will help determine the breed of dog

The nucleus can help determine what breed the dog is.

The magnitude of the average induced emf in the wire during this time period is zero.

When a wire loop with radius 0.3 m is placed in a uniform magnetic field of magnitude 0.52 T, an emf (electromotive force) is induced in the wire due to Faraday's law of electromagnetic induction.

If the wire is reshaped from a circle to a square in 0.06 s, we can determine the magnitude of the average induced emf during this time period.

First, we need to determine the magnetic flux through the wire loop, which is given by:

Φ = B * A * cosθ

where B is the magnitude of the magnetic field, A is the area of the loop, and θ is the angle between the magnetic field and the normal to the plane of the loop.

In this case, the angle θ is zero because the magnetic field is perpendicular to the plane of the loop, so we have:

Φ = B * A

where A is the area of the loop.

When the wire is reshaped from a circle to a square, the area of the loop changes, but the magnetic flux through the loop remains constant.

This is because the magnetic field is uniform, and the orientation of the loop with respect to the field does not change. Therefore, we can write:

Φ = B * A_circle = B * A_square

where A_circle is the area of the original circular loop, and A_square is the area of the new square loop.

Since the radius of the original loop is 0.3 m, we have:

A_circle = π * \((0.3 m)^2\) = 0.2827\(m^2\)

When the loop is reshaped into a square, each side has length 0.3 m, so we have:

A_square =\((0.3 m)^2\)= \(0.09 m^2\)

Substituting these values into the equation for the magnetic flux, we obtain:

Φ = B * A_circle = (0.52 T) * \((0.2827 m^2\)) = 0.1471 Wb

Now we can use Faraday's law to determine the average induced emf during the 0.06 s time period.

Faraday's law states that the magnitude of the induced emf is equal to the rate of change of the magnetic flux, so we have:

emf = ΔΦ/Δt

where ΔΦ is the change in the magneconstanttic flux during the 0.06 s time period. Since the magnetic flux remains , ΔΦ is zero, and the average induced emf during this time period is also zero.

Therefore, the magnitude of the average induced emf in the wire during this time period is zero.

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The change in momentum of the two-object system from immediately before the collision to immediately after the collision is m(v-V) + 2m(V-v).

The change in momentum of the two-object system from immediately before the collision to immediately after the collision can be determined using the following equation:

Change in Momentum = Final Momentum - Initial Momentum.

Therefore, the change in momentum of the two-object system from immediately before the collision to immediately after the collision is given by m(v-V) + 2m(V-v).

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The correct option is D. Icy comets that were originally orbiting in the inner part of the solar system could have met All of the above of several fates.

The solar system is a collection of celestial bodies that orbit around a central star, the Sun. It includes the Sun, eight planets, dwarf planets, moons, asteroids, comets, and various other small objects.

The eight planets in our solar system, in order from the sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Each planet has unique characteristics, such as size, atmosphere, and number of moons. The dwarf planets in our solar system include Ceres, Pluto, Haumea, and Makemake.

The solar system is thought to have formed about 4.6 billion years ago from a cloud of gas and dust that collapsed under its own gravity. Over time, the particles in this cloud began to stick together and form into larger objects, eventually forming the celestial bodies that make up the solar system today.

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Complete Question: -

Icy comets that were originally orbiting in the inner part of the solar system could have met which of several fates?

A. Collision with a planet or a plantesimal

B. The loss of their icy constituents due to volatilization

C. Being swept to the outer part of the solar system by a strong solar wind.

D. All of the above

The percent uncertainty in the measurement of an infant's pulse rate, which is recorded as 135 +/- 6 beats/min, is 4.4%.

The percent uncertainty is calculated by dividing the range of the measurement (in this case, 6 beats/min) by the average value of the measurement (in this case, 135 beats/min), and then multiplying by 100 to express it as a percentage. In this case, the range is 6 beats/min and the average value is 135 beats/min. Dividing 6 by 135 gives 0.0444, and multiplying by 100 gives 4.44%. Therefore, the percent uncertainty in this measurement is 4.4%.

This measurement indicates that the pulse rate of the infant can vary within a range of +/- 6 beats/min from the average value of 135 beats/min. The percent uncertainty provides a measure of the relative variability or precision of the measurement. A lower percent uncertainty would indicate a more precise measurement with less variability, while a higher percent uncertainty would indicate a less precise measurement with greater variability. In this case, a percent uncertainty of 4.4% suggests a reasonably precise measurement of the infant's pulse rate.

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Answer:

Distance =400m

Time=20s

As we know that

\({\boxed{\sf speed \dfrac {Distance {}_{(d)}}{Time {}_{(t)}}}}\)

\(\LARGE\leadsto\sf speed=\dfrac {400}{20}\)

\(\LARGE\leadsto\sf 20m/s\)

Answer:

potential energy,

Explanation:

Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.

The energy stored on the chemical bonds of molecules is chemical energy. When the chemical bonds are broken, the energy is released.

Chemical energy is a form of energy which is stored in the form of chemical bonds. There are various other forms of energy such as electrical energy, mechanical energy, kinetic energy etc.

There are different types of chemical bonds such as ionic bonds, covalent bonds, metallic bonds etc. Each type of bond are of different bond strength and energy.

Molecules are formed by the combination of atoms through chemical bonding. Chemical energy is stored within the bonds and this energy releases when the bond breaks.

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The general equation of simple harmonic motion is

y = a cos (? t )or y = a sin (? t )

but here y = a cos (? t )...because at t=0 amplitude is maximum

Here amplitude 'a '= 0.01 m

m = 0.3 kg

x = 0.02 m

Force constant k is given by,

k = mg / x = 0.3 x 9.8/ 0.02 = 147 N/m

The time period of oscillation is given by ,

T = 2 ? ?( m / k )

? = 2 ? / T = ? ( 147 / 0.3 )

? = 22.1

then y = (0.01m) cos (22.1 t )

In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull. A force has both value and path, making it a vector quantity.

A pressure is a push or a pull and it affects our each day lives because without force, people might not be capable of open and near stuff or lift up our arms or legs.

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Answer: Airplanes fly because they are able to generate a force called Lift which normally moves the airplane upward.

Explanation:

Answer:

17.27 Hz

Explanation:

Applying

v = λf................ Equation 1

Where v = speed of the car, λ = Distance between successive crevice, f = number of crevice moved in 1 seconds(Frequency of the vibration)

make f the subject of the equation

f = v/λ............. Equation 2

From the question,

Given: v = 38 m/s, λ = 2.2 m

Substitute these values into equation 2

f = 38/2.2

f = 17.27 Hz