A housefly walking across a surface may develop a significant electric charge through a process similar to frictional charging. Suppose a fly picks up a charge of +42 pC.How many electrons does it lose to the surface it is walking across?

Answer:

C

Explanation:

I got it right on the test !!

The student that is correct is C. Student B is correct because Newton’s 1st Law of Motion states that if the chair were to be exerting a force on the student, her motion would change.

According to Newton's third law of motion, there's an equal and opposite reaction force for every action force. It should be noted that when an individual sits on a chair, the chair is actually exerting a force back on her in reaction to the force exerted upon the chair.

Student A is incorrect because when she sits down on a chair, the force that she's exerting on the chair is not the only thing that happens because the chair exerts a force back. Therefore, as the chair were to be exerting a force on the student, her motion would change.

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As a galaxy evolves and becomes more massive, the factor that is most likely to happen is option  B: It will merge with other galaxies.

When two galaxies merge, they can create a larger, more massive galaxy. This process can take millions or billions of years to occur, and it is driven by the mutual gravitational attraction between the two galaxies.

Therefore, During the merger, the individual stars and other celestial bodies within the galaxies will continue to orbit as they did before, but the overall shape and structure of the resulting galaxy may be significantly different from that of the original galaxies.

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Answer:A

Explanation:

The wavelength of the sound wave will be 3 meters.

The wavelength of any wave is defined as the distance between two max adjacent amplitudes, or the distance between two successive troughs or crest.

Now it is given that:

Distance =9 meters

time = 3 seconds

pitch=1/3 seconds

The velocity of  the sound will be

\(V=\dfrac{d}{t}=\dfrac{9}{3}=3\ \frac{m}{s}\)

Now from the question the wavelength of the sound wave if the velocity of the wave remains constant but the pitch is tripled

so  \(f=3\times \dfrac{1}{3}=1 herts\)

Now the velocity of the sound will be

\(v=f\times \lambda\)

\(\lambda=\dfrac{v}{f}=\dfrac{3}{1}=3\ m\)

Thus the wavelength of the sound wave will be 3 meters.

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The scale reading will be 390 N.

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The molar mass of a compound can be found by adding the molar masses of all of the atoms in the compound.

The molar mass of an atom can be found on the periodic table by looking at the atomic mass listed for that element.

For example, to find the molar mass of water (H2O), we would add the molar masses of two hydrogen atoms (2 x 1.01 g/mol) and one oxygen atom (16.00 g/mol) to get a total molar mass of 18.02 g/mol.

Another way is by finding the molecular formula of the compound, it can be done by analyzing the compound's chemical and physical properties and then using the mass spectrometer to determine the molecular weight.

In conclusion, the molar mass of a compound can be found by adding the molar masses of the atoms in the compound using the atomic masses listed on the periodic table, or by determining the molecular formula of the compound and using a mass spectrometer to find the molecular weight.

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Answer:

Gravity.

Explanation:

Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.

Additionally, the gravity of earth makes it possible for all physical objects to possess weight.

This ultimately implies that, this force is a pull between all objects. It is the force that gives us weight here on Earth. And, if we throw a rock off of a cliff, it is the force that causes the rock to fall to Earth.

It is a true statement that the idea that all matter consists of elements was first introduced a few hundred years ago.

Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma.

These different states of matter have different characteristics according to which they vary their volume and shape.

Individuals have believed that earth, air, water, and fire are the only four elements that make up matter for roughly two thousand years.

For more than two thousand years, Aristotle's theory that all matter is composed of just four elements was accepted, but only around 500 years ago did scientists begin to find all of the elements that are currently recognized.

Beginning around five hundred years ago, scientists started learning about all of the elements that are currently recognized.

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Answer:

sorry I cannot give the answer I know only little bit about it

To calculate the kinetic energy of the car at point B, we first need to determine its velocity at that point. We can use the work-energy principle to relate the work done by the driving force to the change in kinetic energy of the car:

Work done by driving force = Change in kinetic energy

The work done by the driving force is equal to the product of the force and the displacement:

Work done = Force x Displacement = 66 MN x 150 m = 9.9 GJ

The change in kinetic energy is equal to the final kinetic energy minus the initial kinetic energy. Assuming the car starts from rest at point A, its initial kinetic energy is zero. Therefore, the final kinetic energy at point B is equal to the work done by the driving force:

Final kinetic energy = Work done = 9.9 GJ

Note that we converted the force to MN (meganewtons) and the energy to GJ (gigajoules) to match the SI unit system commonly used in physics calculations.

The average speed of the particles in terms of the speed of light is 0.976c. Given that, The particle-X has a lifetime of 256.2.A particle track detector is used to measure the speed of particles. On average, the particles leave 10.6 cm long tracks before they decay into other particles that are not observable by the detector.

The formula to calculate the average speed of the particles is given as;v = d / t Where,v = velocity of the particles, d = distance traveled by the particles, and t = time taken by the particles. The distance traveled by the particles before they decay is 10.6 cm = 0.106 m. The lifetime of the particle is given as 256.2 s. Therefore, time taken by the particle to decay, t = 256.2 s.

The speed of the particles can be calculated as follows; v = d / tv = 0.106 / 256.2v = 4.135 × 10^-4 m/s The speed of the particles in terms of the speed of light can be calculated as follows; Speed of light = 3 × 10^8 m/s Average speed of the particles in terms of the speed of light, v/c= (4.135 × 10^-4) / (3 × 10^8)= 0.976 × 10^-8= 0.976cTherefore, the average speed of the particles in terms of the speed of light is 0.976c.

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Answer:

A)    F = M a

Short fom of Newton's Second Law

The moment of inertia of the square formed by four thin uniform rods is (5/3) * m * l².

The moment of inertia of an object is a measure of its resistance to changes in rotational motion. In this case, we have a square formed by four thin uniform rods, each with mass m and length l. The axis of rotation passes through the centers of two opposite rods.

To calculate the moment of inertia of the square, we can consider it as a combination of two thin rods, each with mass (2m), rotating about their centers. The moment of inertia of a thin rod rotating about its center is (1/12) * m * l². Since we have two such rods, we multiply this value by 2.

Therefore, the moment of inertia of the square is given by (1/6) * m * l². However, the axis of rotation for the square does not pass through its geometric center but through the centers of two opposite rods. This shifts the moment of inertia by a factor of (5/3), resulting in the final formula for the moment of inertia of the square as (5/3) * m * l².

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Moment of inertia:\((4/3)mL^2.\)

The moment of inertia of the square formed by four thin uniform rods can be calculated by considering the moment of inertia of each rod and applying the parallel axis theorem.

Each rod can be considered as a thin rod rotating about its center, which has a moment of inertia of\((1/12)mL^2\), where m is the mass of the rod and L is its length.

To calculate the moment of inertia of the square, we need to consider the distance between the axis of rotation and the center of each rod. The distance between the axis and the center of a rod is half the length of the square, which is L/2.

Applying the parallel axis theorem, we can find the moment of inertia of each rod with respect to the axis of rotation. The moment of inertia of each rod is\((1/12)mL^2 + m(L/2)^2 = (1/12)mL^2 + (1/4)mL^2 = (1/3)mL^2.\)

Since there are four rods, we need to multiply the moment of inertia of each rod by 4.

Therefore, the moment of inertia of the square formed by four thin uniform rods is \((1/12)mL^2\)

In 100 words: The moment of inertia of the square formed by four thin uniform rods, each of mass m and length l, is given by\((4/3)mL^2.\) This can be obtained by considering the moment of inertia of each rod, which is \((1/12)mL^2\), and applying the parallel axis theorem. The distance between the axis of rotation and the center of each rod is L/2. By summing the moments of inertia of all four rods, we obtain the final result.

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Answer:

Newton's third law of motion

Explanation:

if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

Answer:

A screw is a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force.[1] It is one of the six classical simple machines. The most common form consists of a cylindrical shaft with helical grooves or ridges called threads around the outside.[2][3] The screw passes through a hole in another object or medium, with threads on the inside of the hole that mesh with the screw's threads. When the shaft of the screw is rotated relative to the stationary threads, the screw moves along its axis relative to the medium surrounding it; for example rotating a wood screw forces it into wood. In screw mechanisms, either the screw shaft can rotate through a threaded hole in a stationary object, or a threaded collar such as a nut can rotate around a stationary screw shaft.[4][5] Geometrically, a screw can be viewed as a narrow inclined plane wrapped around a cylinder.

Explanation:

Given the following information:Mass of the system, m = 20 kg.Damping coefficient, b = 6 Ns/m.Force, F = 90 N.Frequency of applied force, f = ?Applied force angular frequency, w = 6 rad/s.Forced vibration equation:F(t) = F0 sin(wt)where F0 = 90 N and w = 6 rad/s.Under the action of the force F, the mass m will oscillate.The equation of motion for the mass-spring-damper system is given by:$$\mathrm{m\frac{d^{2}x}{dt^{2}}} + \mathrm{b\frac{dx}{dt}} + \mathrm{kx = F_{0}sin(\omega t)}$$where k is the spring constant.x(0) = 0 and x'(0) = 0.As we have the damping coefficient (b), we can calculate the damping ratio (ζ) and natural frequency (ωn) of the system.Damping ratio:$$\mathrm{\zeta = \frac{b}{2\sqrt{km}}}$$where k is the spring constant and m is the mass of the system.Natural frequency:$$\mathrm{\omega_{n} = \sqrt{\frac{k}{m}}}$$where k is the spring constant and m is the mass of the system.Resonant frequency:$$\mathrm{\omega_{d} = \sqrt{\omega_{n}^{2}-\zeta^{2}\omega_{n}^{2}}}$$At resonance, the amplitude of the system will be maximum when forced by a sinusoidal force of frequency equal to the resonant frequency.Resonant frequency:$$\mathrm{\omega_{d} = \sqrt{\omega_{n}^{2}-\zeta^{2}\omega_{n}^{2}}}$$$$\mathrm{\omega_{d} = \sqrt{(6.57)^{2}-(-2.88)^{2}} = 6.98 rad/s}$$Hence, the frequency of applied force at which resonance will occur is 6.98 rad/s.

The frequency of the applied force at which resonance will occur is ω = 2√5 rad/s.

To determine the frequency of the applied force at which resonance will occur, resonance happens when the frequency of the applied force matches the natural frequency of the system. The natural frequency can be determined using the formula:

ωn = √(K / M),

where ωn is the natural frequency, K is the spring constant, and M is the mass of the system.

Substituting the given values of K = 400 N/m and M = 20 kg into the equation, we can calculate the natural frequency ωn.

ωn = √(400 N/m / 20 kg) = √(20 rad/s²) = 2√5 rad/s.

Therefore, the frequency of the applied force at which resonance will occur is ω = 2√5 rad/s.

The correct question is given as,

M= 20kg

Fo = 90 N

ω = 6 rad/s

K = 400 N/m

C = 125 Ns/m

Determine the frequency of applied force at which resonance will occur?

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Answer:

mixture of all colors of ligjt

Answer:

White light is a mixture of all the colors of light.

Explanation:

I took the test.

Answer:

The correct answer would be "They are opposites because endothermic reactions require energy and exothermic reactions release energy".

Answer:

W = 0 J

Explanation:

The amount of work done by gas at constant pressure is given by the following formula:

\(W = P\Delta V\)

where,

W = Work done by the gas

P = Pressure of the gas

ΔV = Change in the volume of the gas

Since the volume of the gas is constant. Therefore, there is no change in the volume of the gas:

\(W = P(0\ m^3)\\\)

W = 0 J

False. It is incorrect to consider a lightbulb as a kind of lever.

A lightbulb is not a kind of lever. A lever is a simple machine that consists of a rigid bar or plank that rotates around a fixed point called a fulcrum. Levers are used to transmit and amplify forces or to change the direction of applied forces. They work based on the principle of torque, where a force is applied at a certain distance from the fulcrum, creating rotational motion.

On the other hand, a lightbulb is an electrical device that produces light when an electric current passes through it. It consists of a filament or a gas-filled chamber enclosed in a glass bulb. The functioning of a lightbulb is based on the principles of electrical resistance and thermal radiation, rather than the mechanical principles of levers.

While levers and lightbulbs both exist as objects, they serve entirely different purposes and operate on different principles. Levers are used for mechanical advantage and force amplification, while lightbulbs are used for generating light through the conversion of electrical energy.

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7. The displacement from A to B is 10m. Option (d) 10m.

6. The displacement from A to B is 9m. Option (e) 9m.

To calculate the displacement, find the net or total displacement from point A to point B.

For question 5, the given displacements are:

3m

4m

3m

To find the total displacement, add up these displacements:

Total displacement = 3m + 4m + 3m = 10m

Therefore, the displacement from A to B is 10m. Option (d) 10m is the correct answer.

For question 6, the given displacements are:

2m

5m

2m

To find the total displacement, add up these displacements:

Total displacement = 2m + 5m + 2m = 9m

Therefore, the displacement from A to B is 9m. Option (e) 9m is the correct answer.

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Answer is D

Taking the test rn and found out the answer

The projectile D traveled the greatest horizontal distance.

Projectile motion is a form of motion experienced by an object or particle that is projected near the Earth's surface and moves along a curved path under the action of gravity only.

Horizontal range of a projectile is the horizontal distance travelled by the projectile between launch and the landing points.

The projectile horizontal distance is depend on horizontal speed and time in air.

In all these four projectile, projectile D has maximum horizontal speed and time in air.

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Answer:

It is D

Explanation:

mechanical

Answer:

it is D on edge

Explanation:

The drift velocity (v) of charge carriers in a conductor is given by the following equation: v = I / (n \(\times\) A \(\times\) q).

v = I / (n \(\times\) A \(\times\) q)

where:

v is the drift velocity, measured in meters per second (m/s)

I is the current flowing through the conductor, measured in amperes (A)

n is the number of charge carriers per unit volume of the conductor, measured in per cubic meter (\(m^(-3)\))

A is the cross-sectional area of the conductor, measured in square meters (m^2)

q is the charge of a single carrier, such as an electron, measured in coulombs (C)

This equation relates the drift velocity of the charge carriers to the current flowing through the conductor, the number of charge carriers per unit volume, the cross-sectional area of the conductor, and the charge of a single carrier. The drift velocity represents the average velocity of the charge carriers as they move through the conductor in response to an applied electric field.

The number of charge carriers per unit volume (n) depends on the material of the conductor and the temperature. In metals, the charge carriers are typically electrons, and the number density is on the order of 10^28 to 10^29 electrons per cubic meter.

The cross-sectional area (A) of the conductor is the area of the cross-section of the conductor perpendicular to the direction of the current flow, and is a measure of the amount of material available for the charge carriers to move through.

The charge of a single carrier (q) is typically the charge of an electron, which is approximately 1.6 x \(10^{-19\) coulombs.

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Answer:

between B and D

I I srongly recommend B

Answer:

“I think it’s about putting yourself in the students’ shoes and seeing how a first-time student, maybe someone who hasn’t even taken chemistry before, is looking at it.”

—Valerie Taraborelli, undergraduate chemistry student, University of Arizona1

“In some ways, I think the people who are the most successful as teachers are the ones who are able to remember what it was like being uncertain and not knowing. When you become an expert, things are easy. So the idea is to try and see where [students] are coming from and why they’ve developed this misconception and what you can do to specifically address it.”

—Dee Silverthorn, biology professor, University of Texas2

Answer:

its B

Explanation:

i just took the test

0.1 Hz the approximate frequency of the wave shown.

In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time.

After moving through a sequence of situations or locations and then returning to its initial position, a body in periodic motion is said to have experienced one cycle or one vibration. See also basic harmonic motion and angular velocity.

The frequency is 2 per second if the period, or time interval, needed to complete one cycle or vibration is 1/2 second; it is 100 per hour if the duration is 1/100 of an hour.

Therefore, 0.1 Hz the approximate frequency of the wave shown.

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Answer: A.

Explanation: Because it is like when you rub your knees on a rug it is tensional so that would make it a not active force.

Resolving power refers to the ability of a lens to distinguish between two closely spaced objects. It is determined by the wavelength of light and the numerical aperture of the lens.

Magnifying power, on the other hand, refers to the ability of a lens to enlarge the size of an object. It is determined by the focal length of the lens.
The term "parfocal" refers to a type of lens system where multiple lenses have the same focal point when the focus is adjusted. This means that when switching between different lenses, the focus remains the same, making it easier for the user to switch between lenses without losing focus.
Differentiating between the resolving power and magnifying power of a lens involves understanding their respective functions. Resolving power refers to the ability of a lens to distinguish between two closely spaced objects, or in other words, the clarity with which the lens can produce an image. Magnifying power, on the other hand, refers to the degree to which a lens can enlarge the image of an object.

The term "parfocal" is used to describe a set of lenses that, when interchanged on a microscope or other optical instrument, maintain their focus on the same object. This means that when you switch from one parfocal lens to another, only minimal adjustments to the focus are needed, allowing for a seamless transition between lenses with different magnifying powers.

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Resolving Power: It is the ability of a lens to separate or distinguish between closely spaced objects, reflecting the detail that can be seen with the lens.

Magnifying Power: It denotes how much larger an object appears through a lens compared to its actual size. High magnification doesn't necessarily mean better image quality.

Parfocal: This term refers to lenses that remain in focus even when the magnification or focal length changes. It enables swift adjustments in magnification without needing constant refocusing.

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Mass doesn't change. It doesn't matter where you are.

If your mass is 80 kg when you're on Earth, then your mass is 80 kg. It doesn't matter where you are, where you used to be, or where you're going tomorrow.