how many electrons are there in an amount of electron of 1 kg mass if mass of an electron is 9.1×10^-31 kg .what is it's charge?​

If the the dolphin produces sound waves of wavelength of 5 cm determine by the means of calculations whether the frequency produced by dolphin can be heard by human ear the speed of sound is water is 1480 m. S-1

To determine whether the frequency produced by the dolphin can be heard by the human ear, we can use the formula:

v = f x λ

where v is the velocity of sound in water, f is the frequency of the sound wave, and λ is the wavelength of the sound wave.

Given v = 1480 m/s, λ = 5 cm = 0.05 m, we can rearrange the formula to solve for f:

f = v / λ

Plugging in the values, we get:

f = 1480 m/s / 0.05 m

f = 29600 Hz

Therefore, the frequency produced by the dolphin is 29600 Hz.

The human ear can typically hear frequencies ranging from 20 Hz to 20,000 Hz, with some variation among individuals. Therefore, the frequency produced by the dolphin is well beyond the range of human hearing.

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The correct answer is A. Potential energy is converted to kinetic energy.

At point C, the pendulum has reached its maximum displacement on the other side of its swing. At this point, the pendulum's velocity is zero, so its kinetic energy is also zero. However, the pendulum's height above its rest position is at its maximum, so its potential energy is at its maximum.

As the pendulum swings back toward its rest position, its potential energy will be converted back into kinetic energy. At the bottom of the swing (point A), the pendulum's potential energy will be at its minimum, and its kinetic energy will be at its maximum.

Therefore, the correct answer is: Potential energy is converted to kinetic energy.

What is Potential energy?

Potential energy is a form of energy that an object possesses due to its position or state. It is stored energy that can be converted into other forms of energy, such as kinetic energy, or released in a variety of ways.

What is kinetic energy?

Kinetic energy is a form of energy that an object possesses due to its motion. It is the energy an object has because of its motion, mass, and velocity. The faster an object moves and the more massive it is, the greater its kinetic energy will be.

The formula for kinetic energy is:

KE = 1/2 * m * v^2

where KE is kinetic energy, m is the mass of the object, and v is the velocity of the object.

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The potential energy of the cat is 17.76 joules.

The kinetic energy of the cat just before hitting the ground is 84.59 joules.

Part 1:

The potential energy of the cat can be found using the formula:

potential energy = mass x gravity x height

where the mass of the cat is 3.63 kg, gravity is 9.81 m/s², and height is 0.5 meters.

Substituting these values in the formula, we get:

potential energy = 3.63 kg x 9.81 m/s² x 0.5 m

potential energy = 17.76 joules

Therefore, the potential energy of the cat is 17.76 joules.

Part 2:

The kinetic energy of the cat just before hitting the ground can be found using the formula:

kinetic energy = 0.5 x mass x velocity²

To find the velocity of the cat just before hitting the ground, we can use the equation of motion:

height = (1/2) x acceleration x time² + initial velocity x time

where height is 0.5 meters, acceleration is gravity (9.81 m/s²), time is 2 seconds, and initial velocity is 0 m/s (since the cat starts from rest).

Rearranging this equation to solve for velocity, we get:

velocity = (height - (1/2) x acceleration x time²) / time

velocity = (0.5 - (1/2) x 9.81 x 2²) / 2

velocity = -4.905 m/s (the negative sign indicates that the velocity is downward)

Substituting the mass of the cat (3.63 kg) and the velocity (-4.905 m/s) in the formula for kinetic energy, we get:

kinetic energy = 0.5 x 3.63 kg x (-4.905 m/s)²

kinetic energy = 84.59 joules

Therefore, the kinetic energy of the cat just before hitting the ground is 84.59 joules.

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The ball would be hit if it was hit at an angle of 25° and a velocity of 80 mph, it will travel 1-8m.

The definitiοn οf velοcity is the rate at which a bοdy mοves in a particular directiοn. Velοcity is the rate at which a distance changes in relatiοn tο time. A vectοr quantity with bοth magnitude and directiοn is velοcity.

The amοunt οf matter in a bοdy is referred tο as its mass. The kilοgramme is the kilοgrams, which is the SI unit οf mass (kg). Mass is defined as: Mass = Density/Vοlume.

Therefοre, ball wοuld be hit if it was hit at an angle οf 25° and a velοcity οf 80 mph, it will travel 1-8m.

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Discovery Statement:

I discovered that my note-taking skills needed improvement when I attended a lecture by a guest speaker who spoke very quickly and used complex technical terms that were unfamiliar to me. I found it challenging to keep up with the speaker's pace and understand the content at the same time. As a result, I struggled to take accurate and organized notes, and ended up with a confusing and incomplete set of notes. When I reviewed my notes later, I realized that I had missed important points and failed to capture the essence of the lecture. This experience made me realize that I need to improve my note-taking skills, especially in situations where the content is complex and the speaker is fast-paced.

My intention is to implement the following five note-taking strategies immediately to improve my skills:

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See transcribed text below

MINDTAP

try: Transform Your Note-Taking

ms Journal Entry Transform your note taking

3

Q Search this course

0

Q

Question 1 of 1

Think back on the last few lectures you have attended. How would you rate your note-taking skills? As you complete this exercise, think of areas that need improvement.

1. Discovery Statement

First, recall a recent incident in which you had difficulty taking notes. Perhaps you were listening to an instructor who talked fast. Maybe you got confused and stopped taking notes altogether. Or perhaps you went to review your notes after class, only to find that they made no sense at all. Describe this incident in more detail, noting how it was challenging for you.

I discovered that...

X

2. Intention Statement

Now review this chapter to find at least five strategies that you can use right away to help you take better notes. In the space below, sum up each of those strategies in a few words, and note the title of the article where these strategies are explained.

2 Action Statement

Q Search

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b

بین

9:19 PM

3/3/2023

(a) There is only one degree of freedom in this problem since the collar can move along the shaft but cannot rotate. The constraints are that the distance between the collar and the pivot point is always equal to l, and the collar cannot move perpendicular to the shaft.

(b) The forces acting on the collar are the spring force and the gravitational force. Since the collar is sliding along a frictionless shaft, there is no frictional force. The equation of motion for the collar is given by:

m(d²x/dt²) = -k(x-l) - mg

where x is the displacement of the collar from its equilibrium position.

(c) The normal force between the collar and the shaft is perpendicular to the shaft and balances the component of the gravitational force that is perpendicular to the shaft. As the collar moves away from its equilibrium position, the spring force becomes unbalanced and the normal force changes accordingly. The normal force is given by:

N = mgcos(θ) + k(x-l)sin(θ)

where theta is the angle between the shaft and the vertical axis.

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a) In a series circuit, the current remains the same throughout, so the current in the ammeter A1 is the same as the current in the ammeter A3. Therefore, the readings of A1 and A3 should be the same.

b) As mentioned in the previously, the readings of A1 and A3 should be the same since they are measuring the same current.

c) To determine the reading of the voltmeter V1, we need to know the current passing through it and the resistance between its two points. Since the circuit contains only resistors, we can apply Ohm's law to calculate the total resistance of the circuit.

The total resistance of the circuit can be calculated as follows:

Total Resistance = 9 x 3Ω (since there are nine 3Ω resistors connected in series)

Total Resistance = 27Ω

Since the current in the ammeter A1 is 1 ampere, the voltage across the voltmeter V1 can be calculated using Ohm's law:

V1 = I x R

V1 = 1 x 27

V1 = 27 volts

Therefore, the reading of the voltmeter V1 should be 27 volts.

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For two objects of the same mass and radius, the one with more mass concentrated farther away from the axis of rotation will have a larger moment of inertia. Therefore, the moment of inertia of a solid cylinder is greater than that of a thin hoop of the same mass and radius.

The moment of inertia of a thin hoop of mass m and radius r is given by:

I_{hoop} = mr²

The moment of inertia of a solid cylinder of mass m and radius r is given by:

I_{cylinder} = (1/2)mr²

From these equations, the moment of inertia of a solid cylinder is greater than that of a thin hoop of the same mass and radius.

Therefore, a solid cylinder has a larger moment of inertia compared to a thin hoop.

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500 seconds (or 8 minutes and 20 seconds) for 300 C of electric charge to pass through an aluminum wire if the current through it is 0.6 A.

To answer this question, we need to use the formula:

Q = I × t

where:

Q is the electric charge in Coulombs (C)

I is the current in Amperes (A)

t is the time in seconds (s)

We can rearrange this formula to solve for t:

t = Q / I

Substituting the given values, we get:

t = 300 C / 0.6 A

t = 500 seconds

Therefore, it would take 500 seconds (or 8 minutes and 20 seconds) for 300 C of electric charge to pass through an aluminum wire if the current through it is 0.6 A.

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If you cut a wire directly and squarely across its width, the end will look like a circle. The cross sectional is the area of that end.

If you cut a wire directly and squarely across its width, the end will look like a circle. The cross sectionarea is Pi x r2, which is the area of that end. When the wire type is the same, a larger cross section area results in lower resistance per foot.

It is assumed that the cross's length and area The conductor's section is doubled. This means that the new length and cross sectional area are both 2l and 2A. As a result, the new resistance of the conductor is R′=2l2A=lA.

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The electrostatic force between the negatively charged rod and the metal can will increase when additional negative charges are added to the rod, while the gravitational force between them will remain the same.

This is because the electrostatic force between the rod and the can is proportional to the charge on the rod and the distance between them, according to Coulomb's law. Adding additional negative charges to the rod increases its total charge, which in turn increases the electrostatic force between the rod and the can.

On the other hand, the gravitational force between the rod and the can is determined by their masses and the distance between them, according to the law of gravitation. Since neither the mass nor the distance between the rod and can changes in this experiment, the gravitational force remains the same.

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Answer:

If the water in the left side drops .2 m then the water on the right side rises by .2 m

The pressure on the gas is due to the height difference of the water on the two sides.

P = ρ g h

ρ g = 9.8 m/s^2 * 1000 kg / m^3 = 9800 N/m^3      weight density of water

P = 9800 N/m^3 * .4 m = 3920 N / m^2 = 3.92E3 N/m^2

Absolute pressure of gas = 3.92E3 / 1.01E5 = .0388 atmosphere

The fraction of the engine power used to make the airplane climb is 0.14.

The fraction of the engine power used to make the airplane climb can be determined by the equation Pclimb/Pengine = mgh/Pengine, where Pclimb is the power used to climb, m is the mass of the airplane, g is the acceleration due to gravity, and h is the rate of climb. In this case, Pclimb = 75 kW, m = 700 kg, g = 9.81 m/s2, and h = 2.5 m/s. Plugging these numbers in, we get:
Pclimb/Pengine = (700 kg)(9.81 m/s2)(2.5 m/s)/75 kW
Pclimb/Pengine = 0.14
Therefore, the fraction of the engine power used to make the airplane climb is 0.14.

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Answer:

Yes you're correct

Explanation:

The Moon's surface is not perfectly smooth but rather has mountains and valleys. Imagine looking at a sponge at a certain angle  and put a dim flashlight behind the sponge. You can see that the grooves make it so its not a perfectly straight shadow.

The fact that the line dividing the dark and bright regions of the Moon is not perfectly straight proves that the Moon's surface is not perfectly smooth but rather has mountains and valleys.This is because the terrain of the Moon is comprised of mountains, craters, and valleys, meaning that the line separating the dark and bright regions will not be completely straight.

The irregularities of the terrain cause the line to appear wavy, and thus not completely straight. This tells us that the surface of the Moon is far from perfectly smooth.

To illustrate this further, a comparison can be drawn between the Moon and a billiard ball. If the Moon's surface were perfectly smooth, the line separating the dark and bright regions would be perfectly straight, just as if a billiard ball had been sliced in half. However, since the surface of the Moon is not perfectly smooth, the line appears wavy due to the irregularities of the terrain.

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Between 1980 and 2010, there were significant differences in the average annual ice loss of glacial mass balance between different glaciers and geographical areas. This suggests that ice loss has risen since the 1980s.

The average annual mass balance of reference glaciers globally between 1980 and 1999 was -0.50 m water equivalent (w.e.) per year, while between 2000 and 2017 it was -0.69 m w.e. per year, according to the World Glacier Monitoring Service. This shows a pattern of higher ice loss compared to the 1980s and 1990s in recent years. It's crucial to remember that this figure represents an average across a significant number of glaciers.

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The table suggests that the acceleration of the marble increases steadily over time due to the increasing force being applied to it. This is because acceleration is directly proportional to the force applied, according to Newton's second law of motion (F = ma).

Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.

Newton's second law is often stated as F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a). This means the more mass an object has, the more force you need to accelerate it. And the greater the force, the greater the object's acceleration.

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When the ball on the left is pulled to the side and released, it will swing back and hit the ball on the right. Upon impact, the momentum of the left ball will be transferred to the right ball, causing the right ball to start swinging to the right while the left ball will come to a stop.

Therefore, the correct answer is: "The ball on the right will swing to the right." Option C

In physics, momentum is a property of moving objects that is determined by both their mass and velocity. It is defined as the product of an object's mass and velocity, and it is a vector quantity, which means it has both magnitude and direction.

Mathematically, momentum (p) is expressed as:

p = m * v

where m is the mass of the object and v is its velocity.

Momentum is conserved in a closed system, meaning that the total momentum of the system remains constant unless an external force acts on it. This is known as the law of conservation of momentum, which is a fundamental principle of physics. The law of conservation of momentum has many practical applications, from understanding the behavior of collisions in billiards or car accidents, to designing spacecraft trajectories, to studying the behavior of subatomic particles

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Answer:

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The frictional force acting on the bullet is 16.08 N. The force produced when two surfaces slide past one another and make contact is known as frictional force.

Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.

we need to use the equation for work done by friction.

The work done by friction is:

W = F_friction * d

F_friction = W / d

where F_friction is the frictional force.

To find the work done by friction, we need to use the kinetic energy equation:

KE = 1/2 * m * v^2

where KE = kinetic energy of the bullet, m = mass of the bullet, and v = velocity of the bullet.

W = KE

Substituting the values,

KE = 1/2 * m * v^2

KE = 1/2 * 0.00791 kg * (352 m/s)^2

KE = 0.782 J

So, the work done by friction is 0.782 J.

Now, we can use the given depth of penetration to find the distance over which the frictional force acts:

d = 0.0486 m

we can use the equation for the frictional force,

F_friction = W / d

F_friction = 0.782 J / 0.0486 m

F_friction = 16.08 N

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If ocean water did not move, it would be hot in the equatorial region and frigid in the polar regions.

Ocean currents are responsible for redistributing heat around the planet. Without these currents, the equatorial region would receive more sunlight and heat than it loses, resulting in an accumulation of heat in the water. On the other hand, the polar regions would lose more heat than they receive, resulting in frigid temperatures.

The rotation of the Earth also influences the movement of ocean water through the Coriolis effect. Without this effect, ocean currents would be less predictable, and their impact on climate and temperature distribution would be more severe. Therefore, ocean currents play a crucial role in regulating Earth's climate, and their disruption could have significant consequences for both marine life and global weather patterns.

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The required object A is moving at a speed of 2.62846 m/s at the end of the ramp.

To determine the speed of object A at the end of the ramp, we can use the principles of conservation of energy and rotational motion.

Given:

First, let's calculate the potential energy (PE) of object A at the beginning of the ramp. The potential energy can be given by:

PE = m * g * h,

PE = 0.115  * 9.8  * 0.14  = 0.1628 J

At the end of the ramp, the potential energy is fully converted into kinetic energy (KE). The kinetic energy can be given by:

KE = (1/2) * I * ω²,

For a solid sphere rolling without slipping, the moment of inertia (I) can be given by:

I = (2/5) * m * r²,

I = (2/5) * 0.115 kg * (0.17 m)² = 0.00132 kg·m²

Now, we can relate the linear speed (v) and the angular velocity (ω) of the rolling object. For a solid sphere rolling without slipping, the relationship is:

v = ω * r,

ω = v / r.

Next, we equate the potential energy at the beginning of the ramp to the kinetic energy at the end of the ramp:

PE = KE

m * g * h = (1/2) * I * ω²

0.115 * 9.8  * 0.14  = (1/2) * 0.00132 * (v / r)²

0.115 * 9.8  * 0.14 = 0.00132/2 * (v / 0.17 )²

v = 2.62846

Therefore, object A is moving at a speed of 2.62846 m/s at the end of the ramp.

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The amount of work done by the force of the rope as it pulled the block through the 6 meters is 9J.

The kinetic energy of the block is given by the formula

K = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]

where,

m = mass of the block

v = velocity

Initially, the block is at rest. After being pulled by rope for 4 seconds it has an initial velocity of 3 m/s. Therefore, its final initial velocity is

Kf = [tex]\frac{1}{2}[/tex](2 kg)[tex](3 m/s) ^{2}[/tex]= 9 J

change in kinetic energy

ΔK = Kf - Ki = 9 J - 0 J = 9 J

Therefore, The amount of work done by the force of the rope as it pulled the block through the 6 meters is 9J.

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Answer:

1.63 m

Explanation:

difference between the length of iron rod and brass rod must remain same, writing it in the equation form

[tex]l_{iron} - l_{brass} = C[/tex]

where C is a constant, differentiation both sides with respect to temperature([tex]\theta[/tex]),

[tex]\dfrac{dl_{iron}}{d\theta} - \dfrac{dl_{brass}}{d\theta} = 0[/tex]  ...  (1)

According to linear expansion equation,

[tex]\dfrac{dl}{d\theta} = \alpha l_0[/tex]

where [tex]l_0[/tex] is the length at 0 degree Celsius.

Now,

substituting values in equation 1 we get,

[tex]\alpha_{iron}. l_{iron} - \alpha_{brass} . l_{brass} = 0[/tex]

substituting the values of respective coefficient and length of iron at 0 degree Celsius we get,

[tex]l_{brass} = 1.63[/tex] m

Hopefully, this answer helped you solve the question!

Answer:

The answer is B.

Explanation:

It is clear that the substance will be in liquid state above its melting point and below its boiling point.

A) This is incorrect. The substance is above the melting point but it is also above the boiling point (0 is greater than -183)

B) This is your correct answer. The substance is above the melting point and also below the boiling point.

C) This is incorrect. The substance is below both the melting point and the boiling point.

D) This is incorrect. The substance is drastically below the melting and boiling point.

Therefore , the only correct answer for this question would be B.

The negative terminals of batteries must be connected on the same side of a parallel circuit and positive terminals on the other side to ensure that the voltage across each branch of the circuit is the same and that the batteries share the load equally.

In a parallel circuit, each branch of the circuit provides a separate path for current to flow, and the voltage across each branch is the same. Connecting the negative terminals of the batteries on the same side and the positive terminals on the other side ensures that the voltage across each branch remains the same, as the voltage drop across each battery is identical.

If the batteries were connected with opposite polarity, the voltage across each branch would be different, and the battery with the higher voltage would take on a larger share of the load, leading to unequal discharge and potentially damaging the batteries. It is essential to connect the negative terminals of the batteries on the same side and the positive terminals on the other side to ensure that each battery shares the load equally.

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The biggest state in the United States by land area is Alaska also what the meme

The initial angular acceleration of the steering wheel is 3.67 rad by s2.

The initial angular acceleration of the steering wheel can be calculated using the formula alpha = (F * R) by I, where F is the applied force, R is the radius of the wheel, and I is the rotational inertia.

In this case, F = 20.0 N, R = 0.18 m, and I = 0.097 kgm2. Substituting these values into the formula gives:

alpha = (20.0 N * 0.18 m) by 0.097 kgm2 = 3.67 rad by s2

Therefore, the initial angular acceleration of the steering wheel is 3.67 rad by s2.

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An excellent green, eco-friendly substitute is coconut coir, a byproduct of coconuts. Due to its ability to clean without endangering the ecosystem, coir is becoming increasingly popular and adopted.

The shell of the coconut is known as coco coir. It is immersed in water for a few weeks after extraction to help it loosen and soften. The husk is then dried, brushed, and turned into a product that resembles fibre but is much stronger. Because of the product's durability, stretching or compressing it in any way won't harm it.
Fine brushes, ropes, beds, upholstery, and fishnets are all made from white coco coir, which is extracted from unripe coconuts.

Brown coco coir is pressed from ripe coconuts and used to create mats, pots, and scrubbers that resemble discs for cleaning kitchen surfaces and utensils. In the kitchen, these naturally antimicrobial items are preferable to plastic scrubbers. When they begin, they can be recycled as an organic planting substrate because they are not toxic.

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