Calculate the acceleration for the following data: Initial Velocity=20 m/s, Final
Velocity: 60 m/s, Time: 10 s

Answer:

The charge of an element is equal to the number of protons minus the number of electrons. The number of protons is equal to the atomic number of the element given in the periodic table. The number of electrons is equal to the atomic number minus the charge of the atom.

Explanation:

Answer:

hydrogen sometimes has a charge of zero or (less commonly) -1. Although noble gas atoms almost always carry a charge of zero, these elements do form compounds, which means they can gain or lose electrons and carry a charge.

Explanation:

Answer:

8.89 m/s

Explanation:

rate = distance/time

40m/4.5 sec = 8.8888889 m/s

Approximately 0.000092 moles of electrons were passed through the electrolytic cell.

To calculate the number of moles of electrons passed in an electrolytic cell, you need to use Faraday's constant and the equation relating current (I), time (t), and moles of electrons (n).

Faraday's constant (F) is the amount of electric charge carried by one mole of electrons, which is approximately 96,485 coulombs per mole.

The equation to calculate the moles of electrons (n) is:

n = (I * t) / F

Given:

Current (I) = 250 mA = 0.250 A

Time (t) = 36 seconds

Plugging the values into the equation:

n = (0.250 A * 36 s) / 96,485 C/mol

Calculating the result:

n ≈ 0.000092 moles of electrons

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Answer:A 1000 kg car and a 2000 kg truck have the same momentum when the car is travelling at twice the speed of the truck, i.e. 38 m/s.

When a 1000kg car and a 2000kg truck have the same momentum, the speed of 1000 kg car is twice that of the  2000kg truck.

The product of a particle's mass and velocity is its momentum. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force applied on a particle is equal to the time rate of change of momentum.

As  a 1000kg car and a 2000kg truck have the same momentum,

1000 kg × v₁ = 2000 kg × v₂

v₁ = 2v₂

Hence, the speed of 1000 kg car is twice that of the  2000kg truck.

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Answer:

for students to do nothing

Explanation:

because doing nothing is not a course goal

Answer:

Gravitational attraction caused the volume of the nebula to decrease, which raised the particle motion and temperature at the center of the nebula to the necessary 14 million Kelvin.

Explanation:

Plato/edmentum sample answer

Gravitational attraction caused the volume of the nebula to decrease, which raised the particle motion and temperature at the center of the nebula to the necessary 14 million Kelvin.

Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.[note 1] The publication of the theory has become known as the "first great unification", as it marked the unification of the previously described phenomena of gravity on Earth with known astronomical behaviors.

This is a general physical law derived from empirical observations by what Isaac Newton called inductive reasoning. It is a part of classical mechanics and was formulated in Newton's work Philosophiæ Naturalis Principia Mathematica ("the Principia"), first published on 5 July 1687. When Newton presented Book 1 of the unpublished text in April 1686 to the Royal Society, Robert Hooke made a claim that Newton had obtained the inverse square law from him.

In today's language, the law states that every point mass attracts every other point mass by a force acting along the line intersecting the two points. The force is proportional to the product of the two masses, and inversely proportional to the square of the distance between them.

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The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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Hooke's Law

\(\tt F=k.\Delta x\)

k = spring constant

x = stretch

F = force

Input the value

\(\tt \Delta x=\dfrac{F}{k}=\dfrac{25}{8}=3.125\rightarrow 3.13\:m\)

You push with a force that is just equal to the kinetic or sliding friction.

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The correct answer is not provided in the given options A, B, C, or D. The distance from the axis at which the magnetic field caused by the current is equal in magnitude to Earth's magnetic field is 125 meters.

To find the distance from the conductor at which the magnetic field caused by the current is equal to the Earth's magnetic field, we'll use the formula for the magnetic field around a long straight conductor:

\(B = (de * I) / (2 * \pi  * r)\)

Where B is the magnetic field, μ₀ is the permeability of free space (\(4\pi  * 10^-7 Tm/A\)), I is the current, and r is the distance from the conductor. We want to find the value of r when B equals Earth's magnetic field (0.5 x 10⁻⁴ T).

\(0.5 * 10^-4 T = (4\pi  * 10^-7 Tm/A * 100 A) / (2 * \pi  * r)\)
To solve for r, we can first simplify the equation by cancelling the π terms:

\(0.5 * 10^-4 T = (4 * 10^-7 Tm/A * 100 A) / (2 * r)\)

Now, cancel out the A (Amperes) terms:

\(0.5 * 10^-4 T = (4 * 10^-7 Tm) / (2 * r)\)

Divide both sides by 4 x 10⁻⁷ T:

\(r = (0.5 * 10^-4 T) / (4 * 10^-7 T)\)

Simplify the equation:

r = \(0.5 * 10^3 m / 4\)
r = 500 / 4
r = 125

So, the correct answer is not provided in the given options A, B, C, or D. The distance from the axis at which the magnetic field caused by the current is equal in magnitude to Earth's magnetic field is 125 meters.

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The net force is calculated to be 6.44* 10⁻⁴ N.

Generally, the net force is a force that come up due to the unequal centripetal force and it is mathematically represented as

Fnet = Δ Fcen

and the difference in centripetal force Δ Fcen is mathematically represented as

Δ Fcen = Δm* rω²

Given that, mass = 10 mg = 10* 10⁻³ g

Radius = 12 cm = 0.12 m

70,000 rpm = 70,000* [2π rad/1 rev](1min/60s) = 7326.7 rad/s

Fnet = Δ Fcen = 10* 10⁻³ * 0.12* 7326.7 = 6.44* 10⁻⁴ N

Thus, the net force is 6.44* 10⁻⁴ N.

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Wave variables

In the section on motion in two dimensions, we defined the phrases below to describe harmonic motion:

The amount by which a moving object deviates from its equilibrium position is known as its amplitude.

The number of events per unit of time is known as frequency.

Period is how long an oscillation lasts.

The underlying relevance of each of these factors for waves is the same. But it's helpful to express the ideas in a way that expressly mentions waves: Amplitude is the distance a wave travels between its resting state and its maximum movement.

The quantity of waves that pass by a specific location each second is known as its frequency.

Period is the length of time a wave cycle lasts.

In addition to their wave length and wave velocity, waves are determined by amplitude, frequency, and period.

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The forward acceleration of the bicycle will be 1.52 m/s²

Given parameters:

Force  = 125N

Mass combined = 82kg

Acceleration of the bicycle  = ?

From Newton second law of motion suggests that:

Force = mass x acceleration

 Acceleration =  force/mass = 125/82 = 1.52 m/s²

What is acceleration?

In mechanics, acceleration is the rate of change of an object's velocity with respect to time. Acceleration is a vector quantity (as long as it has magnitude and direction). The direction of an object's acceleration is given by the direction of the net force acting on that object. As described in Newton's second law , the magnitude of an object's acceleration is the combined effect of two sources.

The mass of this object is inversely proportional to the mass of the object, depending on the material from which it is made.

Therefore, The forward acceleration of the bicycle will be 1.52 m/s².

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Answer:

Dude this is based on some egg you have

Explanation:

Answer:

I'm not that busy solving but I'll tell you the formula that Force x distance is equal to work done

The work is done on a pumpkin when we lift it by 15 m with 24 N is 360 J

Work done is the amount energy gained (loosed) in bringing the body from initial position to final position. It is denoted by W and its SI unit is joule(J).  

i.e. Work(W) is force(F) times displacement(s).

W=F× s

When a body is displaced with 1 newton of force by 1 m, then we can say that work has been done on the body by 1 joule.

Writing for it's dimension,

W=F× s

Force has dimension [L¹ M¹ T²]

Displacement has dimension [L¹]

multiplying both the dimensions Force and Displacement  

we get,

dimension of Work [L² M¹ T²]

According to newton's second law of motion,

Force(F) is mass(M) times acceleration(a).

i.e. F=ma

Given,

Force = 24 N

Displacement = 15 m

W=F.s= 24*15 = 360 J

Hence work done on pumpkin is 360 J

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Answer:

please help

Explanation:

Speed ( units of meter/second or cm/second) = distance ( units of meter or cm)/time (units of second).

Distance ( unit of meter) = speed( unit of meter/second) × time (unit of second).

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Now speed = distance/time

and distance = speed × time.

Now in unit form:

speed ( units of meter/second or cm/second) = distance ( units of meter or cm)/time (units of second).

And distance ( unit of meter) = speed( unit of meter/second) × time (unit of second).

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According to the question the air temperature is 296.6 K.

Temperature is a physical property of matter that quantifies the common notions of hot and cold. It is the measure of the average kinetic energy (movement) of the particles that make up a substance. Temperature is measured in various scales, with the most common being Celsius (°C), Fahrenheit (°F), and Kelvin (K).

The speed of sound in air is given by the equation:
v = 331.3 + 0.606T
where v is the speed of sound in m/s and T is the temperature in K.
We can rearrange this equation to find the temperature:
T = (v - 331.3) / 0.606
Since the wavelength of the ultrasound wave is given in cm, we need to convert it to m:
λ = 0.811 cm = 0.0081 m
The frequency of a wave is given by the equation:
f = v/λ
We can rearrange this equation to find the speed of sound:
v = fλ
Substituting in the given values:
v = (42300 Hz)(0.0081 m)
v = 341.3 m/s
Finally, we can substitute this value of v into the equation for temperature:
T = (341.3 - 331.3) / 0.606
T = 296.6 K

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Answer:

Forces come in pairs, so the force of gravity (9.8 N) with the mans weight (794N) on the earth is counteracted with the normal force ( the force of the earth back on the man) which is the same

Explanation:

Forces are available in pairs, so the force of gravity (nine.8 N) with the man's weight (794N) on the planet is counteracted with the everyday force ( the pressure of the earth again on the man) that's identical.

Gravitational force is a pressure that draws any items with mass. We name the gravitational force appealing as it constantly attempts to tug loads collectively, it never pushes them apart. In reality, every item, together with you, is pulling on each other objects inside the complete universe.

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We can use Snell's law. Snell's law relates the angles and indices of refraction of light as it passes through the interface between two media. Therefore, the maximum angle a light ray can make with the wall of the core, while remaining inside the fiber, is approximately 47.1 degrees.

Snell's law can be written as:

n₁ ₓ sin(Θ₁) = n₂ ₓ sin(Θ₂)

In this case, we want to find the maximum angle of incidence, which corresponds to the case where the angle of refraction (Θ₁) is 90 degrees. This is the angle at which the light ray grazes the wall of the core.

When Θ₁ is 90 degrees, sin(Θ₂) becomes 1, and Snell's law becomes:

n₁ ₓ sin(Θ₁) = n₂

Rearranging the equation, we have:

sin(Θ₁) = n₂ / n₁

Taking the inverse sine (or arcsine) of both sides, we get:

Θ₁ = sin⁻¹(n₂ / n₁)

In this case, n₁ is the refractive index of the core (1.60) and n₁ is the refractive index of the cladding (1.43). Substituting these values into the equation, we have:

Θ1 = sin(1.43 / 1.60)

Using a calculator, the value of theta1 is approximately 47.1 degrees.

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When two students pull on the same box at the same time, yet there is no net force on the box, it is possible if the two forces that are being applied are of equal magnitude and are acting in opposite directions.

In such a case, the forces will cancel each other out, and there will be no net force acting on the box. Net force is the sum of all forces that are acting on an object. If two forces act on an object in opposite directions, the net force acting on the object is zero.

This means that the object will not move in any direction and will remain stationary, as there is no force to push it forward or pull it back. In the case of two students pulling a box, if they pull with equal force, but in opposite directions, the box will remain stationary.

This is because the two forces cancel each other out. If the force applied by one student is greater than the force applied by the other student, then there will be a net force acting on the box, and the box will move in the direction of the greater force.

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The correct option for maximizing contrast is 70 kV and 15 mAs. A film with maximum contrast requires a new technique that involves the reduction of kV and mAs parameters. The new technique should be 70 kV and 15 mAs.

Radiography is a technique that enables the creation of medical images of the human body, using an X-ray beam. X-rays are an example of ionizing radiation, and their interaction with the tissues in the body results in the formation of an image. Contrast is the difference in tone between adjacent areas in the image, and it is essential to obtain high contrast in radiography, to ensure the visualization of the structures of interest and to make it possible to detect abnormalities.

Maximizing contrast is a common technique used in radiography, and it involves the adjustment of parameters such as kV, mAs, and exposure time. A high-contrast image can be achieved by reducing kV and mAs and increasing exposure time. The kV and mAs settings are the most important variables to adjust to enhance contrast. A high-kV setting will result in a low-contrast image, while a low-kV setting will produce a high-contrast image.In the given scenario, the original technique is 80 kV and 20 mAs, and all other factors are equal. To enhance the contrast, the new technique should be a combination of reduced kV and mAs. The possible options for a new technique are:

70 kV and 15 mAs70 kV and 30 mAs80 kV and 15 mAs60 kV and 60 mAs

The best option for maximizing contrast is the first option, which is 70 kV and 15 mAs. This is because the kV value has been reduced by 10, and the mAs has been reduced by 5, which will result in an increase in contrast.

The new technique to enhance contrast requires a reduction in kV and m As parameters, and the best option for maximizing contrast is 70 kV and 15 mAs.

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I think it’s a mixture.

Answer:

jewelry gold is a mixture.

Explanation:

it contains more than one element and its composition varies.

a holistic overview of underground hydrogen storage is all three.

Physically, hydrogen can be kept as either a gas or a liquid. Usually, high-pressure tanks are needed for gas storage (5000–10,000 psi tank pressure). Since hydrogen's boiling point at one atmosphere of pressure is -252.8°C, storage of hydrogen as a liquid necessitates cryogenic temperatures.

There are different ways and ways of storing hydrogen: 1) high-pressure gas cylinders (up to 800 bar), 2) cryogenic tanks with liquid hydrogen at 21 K, 3) hydrogen adsorbed on materials with a large specific surface area (at T100 K), and 4) absorbed on interstitial sites in a host metal (at ambient pressure).

In applications such as fixed power, portable power, and transportation, hydrogen storage is a crucial enabling technology for the development of hydrogen and fuel cell technologies.

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If a projectile is launched on level ground without considering air resistance, the launch angle that maximizes the range is 45 degrees.

To maximize the range of a projectile launched on level ground, the optimal launch angle is 45 degrees. This is known as the optimal angle for maximum range.

When a projectile is launched at this angle, it achieves the best balance between the vertical and horizontal components of its motion. The vertical component allows the projectile to reach its maximum height, while the horizontal component determines the distance it travels. At 45 degrees, these components are equal, resulting in the longest range possible.

Launching at angles greater or smaller than 45 degrees will decrease the range due to the imbalanced vertical and horizontal components. Therefore, 45 degrees is the launch angle that maximizes the range of a projectile on level ground.

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The time of motion of the car before coming to a full stop is 6.67 s.

The car length that should be kept between you and the car is 138.33 m.

The given parameters;

The time of motion of the car before coming to a full stop is calculated as follows;

\(v = u + at\\\\when \ the \ car \ stops , \ v = 0\\\\0 = u + at\\\\0 = 40 -6t\\\\6t = 40\\\\t = \frac{40}{6} = 6.67 \ s\)

The distance traveled by the car before coming to a full stop;

\(v^2 = u^2 + 2as\\\\0 = u^2 + 2as\\\\0 = 40^2 -2(6)s\\\\0 = 40^2- 12s\\\\12s = 1600\\\\s = \frac{1600}{12} \\\\s = 133.33 \ m\)

The car length that should be kept between you and the car is calculated as;

car length in front of you = 5 m + 133.33 m = 138.33 m

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Explanation:

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