a plastic balloon that has been rubbed with wool will stick to a wall. can you conclude that the wall is charged? if so, where does the charge come from? if not, why does the balloon stick?

Stars like the Sun primarily transport newly formed elements into the interstellar medium through a process called stellar winds and, in more massive stars, through supernova explosions.

Stars are known to  undergo nuclear fusion in their cores, where they convert lighter elements into heavier ones. This fusion process releases energy and creates new elements, such as helium, carbon, oxygen, and so on. Over millions or billions of years, these newly formed elements accumulate in the stellar interiors.

In the case of stars like the Sun, which are of moderate mass, they eventually enter the later stages of their lives known as the red giant phase.

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A body is pulled along horizontal plane by a constant force of 10N applied pavement to the plane. The work done in moving a distance 20m is (W)= 200 J.

When some amount of force is acted on the object and it moves some distance that means some work has been done on the object. It can be measured in Joule.

To calculate the work done we are using the formula here is,

W=Fd

We are given here,

F= The amount of force acting on the body. = 10N

d= The distance the object move. = 20m

We have to calculate the values of work done = W

Now we put the values in the equation we get,

W= Fd

Or, W= 10*20

Or, W= 200N

From the calculation we can say that, The work done in moving a distance 20m is (W)= 200 J.

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A body is pulled along horizontal plane by a constant force of 10N applied pavement to the plane. calculate work done in moving a distance 20m

The wavelength of the line on star C-197's spectrum is 517.88. A spectrum is a range of electromagnetic radiation, such as light, that is divided into separate bands based on wavelength.

Using the formulae :-

Wavelength (λ) = Speed of light (c) ÷ frequency (f).

Therefore, 517.88 = 3 x 10^8 / f,

and f = 3 x 10^8 / 517.88

= 5.81 x 10^14

The wavelength of a spectral line can be used to identify the chemical elements present in a star and to determine its temperature, density, and other physical characteristics. The wavelength of a spectral line is the distance between two consecutive peaks (or troughs) of a wave. In the case of a star's spectrum, the wavelength of a spectral line is the distance between two consecutive peaks (or troughs) in the light emitted by the star. The specific wavelength of a spectral line is unique to a particular chemical element and is characteristic of that element. To determine the wavelength of a line on a star's spectrum, the spectrum must be observed and analyzed using a spectrometer. The spectrometer splits the light from the star into its component colors and records the intensity of light at each wavelength. The resulting spectrum is a graph of the intensity of light at each wavelength. The spectral lines are the spikes in intensity that correspond to light emitted at specific wavelengths by specific chemical elements. The wavelength of a particular line on a star's spectrum can be measured by finding the position of the peak in intensity corresponding to that line and recording its wavelength.

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Answer:

the magnets share forses when they come in contact with the other making them the same

A particle with a mass of m/2 and a charge of 2q has kinetic energy of 2K when it is propelled from rest by the same potential difference.

Due to the fact that mass has no impact on kinetic energy, W = K = QV. where charge = Q ,q, V = possible discrepancy, mass and k, m = kinetic energy. The kinetic energy of a particle with a 2q charge and a v potential difference is given by the equation K = QV, where K1 = Q1V1. K¹ = 2Q¹ x V¹ = 2(QV) (QV). Due to K = QV, K1 = 2K is obtained by substituting K = QV into 2(QV). Applying the equation E=(k)(q/r2), If q becomes 2q and r becomes 2r, When an electric charge is present in a specific region of space, its properties are altered and an electric field is generated. The term "electric field" refers to the physical field that surrounds electrically charged particles and acts to either attract or repel other charged particles in the field.

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a. Nusselt number (Nu) represents the ratio of convective to conductive heat transfer, indicating the efficiency of convective heat transfer.

b. The Reynolds number (Re) influences the Nusselt number by determining the flow regime, with higher Reynolds numbers corresponding to higher Nusselt numbers and more efficient convective heat transfer.

a. The physical significance of the Nusselt number is that it provides information about the efficiency of convective heat transfer. A higher Nusselt number indicates that convective heat transfer is more dominant compared to conductive heat transfer. It is commonly used to analyze heat transfer in fluid flows, such as in pipes, channels, or heat exchangers.

b. The Reynolds number influences the Nusselt number because it affects the flow regime and flow behavior. In forced convection heat transfer, the Reynolds number determines whether the flow is laminar or turbulent. The transition from laminar to turbulent flow is characterized by a critical Reynolds number.

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Option C, "shape the pot so it has a wider base and same size rim," is correct. This is the option that will increase the angular velocity of the pot.

To increase the angular velocity of the pot, you should shape the pot so that it has a wider base and the same size rim.

The angular velocity of an object is determined by its moment of inertia, which is a measure of the distribution of mass around its axis of rotation. An object with a larger moment of inertia will have a lower angular velocity, while an object with a smaller moment of inertia will have a higher angular velocity.

Shaping the pot so that it has a wider base will cause the mass of the pot to be distributed further from the axis of rotation, which will increase the moment of inertia and decrease the angular velocity. On the other hand, shaping the pot so that it has a wider rim will cause the mass of the pot to be distributed closer to the axis of rotation, which will decrease the moment of inertia and increase the angular velocity.

Therefore, the best choice to increase the angular velocity of the pot is to shape it so that it has a wider base and the same size rim. This will cause the mass of the pot to be distributed further from the axis of rotation, increasing the moment of inertia and decreasing the angular velocity.

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Answer:

the answer is b.

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Answer:

a. Light bulb - electrical to light

b. Firework - chemical to light / thermal / sound

c. Flute - kinetic to sound

d. Leaf-  solar to chemical

While changing direction, the object will continue to move at the same speed.

In way of comparison to kinetic energy, which defines the course and speed of an object's moving, velocity is the amount of mobility along one journey. Alternatively, velocity is a vector and speed is a scalar quantity.

The rate and direction of motion are measured by a vector known as velocity. The speed that something moves in one direction is known as its velocity. Velocity can be used to gauge both the speed of an oncoming car on a busy freeway and the speed of a rocket being launched into space.

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Answer: The moon can sometimes look red during a total lunar eclipse because of sunlight that's filtered and refracted by Earth's atmosphere

Explanation:

The mass of a 32He nucleus is less than the sum of the masses of a 1H nucleus and a 2H nucleus separated from each other.

A nucleus is the core of an atom that has a positive electric charge. It is composed of two forms of nucleons: protons, which have a positive electric charge, and neutrons, which are electrically neutral. The number of protons in a nucleus determines the atomic number of the atom in question.The mass of a 32He nucleus is less than the sum of the masses of a 1H nucleus and a 2H nucleus separated from each other.This is because when two nuclei combine to form a new nucleus, some of the mass is converted into energy. This is known as the mass defect. The mass defect is given by the equation:Δm = ∆E/c^2

where Δm is the mass defect, ΔE is the energy released, and c is the speed of light.

The energy released when two nuclei combine is due to the strong nuclear force, which is the force that holds the nucleus together. The strong nuclear force is a very short-range force, so it only acts between nucleons (protons and neutrons) that are very close together. When two nuclei combine, the nucleons are brought closer together, which increases the strength of the strong nuclear force and releases energy.

The mass defect is a very small amount of mass, but it is significant because it is the source of the energy released in nuclear reactions. Nuclear reactions are used to generate electricity in nuclear power plants and to create nuclear weapons.

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Answer:

B

Explanation:

just took the test

Answer:

b

Explanation:

The tension in the vine if a monkey climbs a vine at a constant speed is 0 Newton.

The magnitude of tension force depends on the amount of force applied to the ends of the string or rope, as well as the properties of the string or rope itself, such as its length, thickness, and elasticity.

Tension force is often used in mechanical systems to transfer forces or transmit power. For example, a cable used to lift a heavy object will experience tension forces as it resists the weight of the object. Similarly, a belt in a car engine experiences tension forces as it transfers power from the engine to the wheels.

Mass of the monkey, m = 20 kg.

Let the tension in the vine be T.

The acceleration of the monkey is zero since the speed is constant.

Using the second law of motion,F = ma

Here, acceleration, a = 0F = 0N = ma= 20 x 0= 0 N

Tension in the vine is zero.

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Answer:

Yes because provided the current is the same.

a)

b) Clay is hydrated through a process called adsorption.

c) Clay swelling is related to Cation Exchange Capacity because as cations are exchanged and adsorbed onto clay surfaces, they can cause the clay mineral structure to expand.

Adsorption, a method, is used to hydrate clay. When clay and water interact, the water molecules cling to the clay's surface and surround the clay particles in a thin layer.

Due to the clay minerals' capacity to grab and hold water molecules via electrostatic forces and surface tension, the hydration process takes place. The type of clay mineral, a given surface area, and environmental conditions are only a few examples of the variables that affect how much clay is hydrated.

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Answer:

- increasing the distance between the objects

- decreasing the mass of one of the objects

- decreasing the mass of both objects

Explanation:

Got it right on Edge 2020.

The gravitational force is decreased by increasing the distance between the objects or decreasing mass of one or both of the objects

According to Newton's law of Universal Gravitation;  The force of gravity is directly proportional to the product of the masses between two bodies and inversely proportional to the square of the distance between them.

F = Gm1m2/r^2

Where;

We can see from the formula above, that the following will result in the decrease of the force between two objects;

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"Yes, the electronic crime scene is handled completely differently from a traditional crime scene. The electronic crime scene refers to a crime that has taken place in the digital world.

In contrast, a traditional crime scene refers to a crime that has taken place in the physical world, and it is evident that the two scenarios are handled differently.

An electronic crime scene refers to the area or place where electronic evidence is gathered for use in investigations or legal proceedings. Electronic evidence refers to information or data stored, created, or transmitted in electronic devices, including computers, smartphones, flash drives, and other digital devices. The collection of electronic evidence differs significantly from the collection of traditional evidence. The first step is the preservation of electronic evidence. In a traditional crime scene, it is possible to cordon off the area using yellow tapes, close windows, and take photographs of the scene. However, this is not the case with an electronic crime scene since electronic evidence is intangible. This is why digital forensic investigators begin the evidence preservation process by creating a forensic image of the electronic device under investigation. This is done to prevent data loss or alteration before investigations commence.

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Answer:

Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

Explanation:

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Answer:- how difficult it is to change an object's motion

Explanation:

Hope I Helped No Need For Brainliest! :)

The flash and report method is a simple and common technique used to measure the speed of sound. In this method, an observer measures the time between seeing a flash, such as from a gunshot or a firecracker, and hearing the corresponding sound. The observer is usually at a known distance from the source of the flash and sound.

To perform the experiment, the observer stands at a fixed distance away from the source of the flash and sound. When the flash is seen, they start a stopwatch or use any other timing device. Once they hear the sound, they stop the timer and note the time difference between the flash and the sound. This time difference is the time it takes for the sound to travel from the source to the observer.

The speed of sound can then be calculated using the formula: speed of sound = distance / time taken. The distance between the observer and the source is divided by the time difference recorded to find the speed of sound in the medium (usually air).

It is essential to ensure that the distance between the source and the observer is accurate and that the observer's reaction time is considered when measuring the time difference. External factors such as temperature, humidity, and altitude also affect the speed of sound and should be taken into account.

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The probable question may be:

Discuss the measurement of the speed of sound using the flash and report method?

Explanation:

the no of proton of an element is found in the inner part of the orbital of an element along with the neutron ,also knowing that this two add up to give mass no an element

where neutron+proton=mass no=nucleon no,where proton= electron, unless it carries charges call ion

Great work on the first one.

The second one is Spring.

(The next position will be #1.

In #1, the southern hemisphere will be tilted toward the sun, so it will be Summer there.

The position just before Summer is Spring.)

The charge in fig A is positive, in fig B is positive and in fig C is negative. this is given by the Fleming's left hand rule.

In magnetism and electromagnetic, the Fleming Left-Hand Rule and Fleming Right-Hand Rule are fundamental principles. They were created by John Ambrose Fleming in the late 19th century as an easy method of determining the direction of motion in an electric motor or the direction of electric current or electric positive charge in an electric generator. It is crucial to remember that these criteria only indicate the direction of the three parameters (magnetic field, current, and force) when the direction of the other two parameters is known and do not define their magnitude.

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Based on the rays drawn above, the mirror forms the image at a distance at about 13 cm.

This can be determined through the use of the ray diagrams and the laws of reflection. When rays of light reflect off a concave mirror, they converge at a point called the focal point. The distance from the mirror to the focal point is called the focal length, which for this particular mirror is 6.5 cm. By drawing the incident ray from the top of the object parallel to the principal axis, and then drawing the reflected ray through the focal point, the point where they intersect is where the image forms. This distance, s', is approximately 13 cm.

In summary, the image forms at a distance of about 13 cm from the mirror.

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Explanation:

a) i) Calculation of the friction force:

The friction force can be determined using the equation:

friction force = coefficient of friction * normal force

The normal force is equal to the weight of the object, which can be calculated as:

normal force = mass * gravitational acceleration

where the gravitational acceleration is approximately 9.8 m/s².

normal force = 75 kg * 9.8 m/s² = 735 N

friction force = 0.4 * 735 N = 294 N

ii) Calculation of the acceleration of the body:

Now, we can calculate the acceleration using Newton's second law:

net force = mass * acceleration

Since the applied force and the friction force act in opposite directions, the net force can be calculated as:

net force = applied force - friction force

net force = 300 N - 294 N = 6 N

mass = 75 kg

6 N = 75 kg * acceleration

acceleration = 6 N / 75 kg = 0.08 m/s²

b) Explanation:

In part (a), we calculated the friction force to be 294 N and the acceleration of the body to be 0.08 m/s². The positive acceleration indicates that the body is moving in the direction of the applied force.

The friction force opposes the motion of the body and acts in the opposite direction to the applied force. In this case, the applied force of 300 N is greater than the friction force of 294 N. As a result, the net force acting on the body is 6 N in the direction of the applied force.

The small net force of 6 N, compared to the body's mass of 75 kg, results in a relatively low acceleration of 0.08 m/s². This indicates that the body will accelerate slowly in the direction of the applied force due to the presence of friction.

Overall, the friction force and the resulting acceleration of the body are determined by the coefficient of friction (μ) and the mass of the object. In this case, the body experiences a relatively high friction force, leading to a small acceleration.

The energy needed to raise the temperature of 1 kg of lead from 40 °C to 60°C will be 2600 Joules.

We can calculate the energy of a substance by using the given formula:

Q = mc∆T

where;

Q = quantity of heat absorbed or released

m = mass of the substance

c = specific heat capacity

∆T = change in temperature(°C)

Now, according to the given question, 1 kg of lead has to be raised from 40°C to 60°C and we also have the specific heat capacity(c) of lead that is 130J/kg°C.

We can calculate the energy by putting the given values in the above equation:

Q = mc∆T

= 1 × 130 × (60-40)

= 20 × 130

Q = 2600J

Therefore, the amount of energy required to raise the temperature of 1 kg of lead from 40°C to 60°C is 2600J.

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We will have the following:

1. 143 g = 0.143 kg:

2. 110 g = 0.110 kg:

3. 410 g = 0.410 kg:

4. 46 g = 0.046 kg:

From this we can see that the given weights do not correspond to any of the values of column B, since the calculations to obtain the values of column B were done using grams, instead of kg, thus those values do not correspond to the unit of force Newtons.

Distances to first three left-hand mirror images: 11.0 ft, 28.0 ft, 56.0 ft.

To determine the distances from the person to the first three images seen in the left-hand mirror, we need to consider the geometry of the situation.

Let's denote the person as P, the left-hand mirror as M1, and the right-hand mirror as M2. The distance from P to M1 is 11.0 ft, and the distance from P to M2 is 14.0 ft.

When the person looks into the left-hand mirror, they see the multiple images formed by the reflections between M1 and M2. These images are formed by the light bouncing back and forth between the mirrors.

To calculate the distances to the images, we need to consider the reflections at each mirror. The distance from P to the first image in M1 is equal to the distance from P to M1.

The distance from the first image in M1 to the second image in M1 is twice the distance between the mirrors (2 * 14.0 ft). Similarly, the distance from the second image in M1 to the third image in M1 is twice the distance between the mirrors.

Therefore, the distances from the person to the first three images seen in the left-hand mirror are:

1st image: 11.0 ft

2nd image: 2 * 14.0 ft = 28.0 ft

3rd image: 2 * 14.0 ft + 2 * 14.0 ft = 56.0 ft

Please note that these distances are calculated based on the given information and assumptions about the geometry of the mirrors.

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You were approximately 5.72 meters away from the second baseman. The vertical drop or distance between point A and point B was approximately 0.4576 meters.

To determine the distance between you (the shortstop) and the second baseman, we can use the formula for horizontal distance (d) traveled by an object moving at a constant horizontal velocity:

d = v * t

where:

- d is the horizontal distance traveled,

- v is the horizontal velocity of the ball,

- t is the time taken.

Given that the horizontal velocity (v) is 13 m/s and the time (t) is 0.44 s, we can calculate the horizontal distance (d) as follows:

d = 13 m/s * 0.44 s = 5.72 meters

So, you were approximately 5.72 meters away from the second baseman.

To find the vertical drop or the distance between point A and point B, we need to calculate the vertical component of the ball's motion. Since the ball is thrown horizontally, it will experience a constant vertical acceleration due to gravity.

The formula to calculate the distance (d) traveled vertically in free fall is:

d = 1/2 * g * t²

where:

- d is the vertical distance traveled,

- g is the acceleration due to gravity (approximately 9.8 m/s²),

- t is the time taken.

Given that the time (t) is 0.44 s, we can calculate the vertical distance (d) as follows:

d = 1/2 * 9.8 m/s² * (0.44 s)² = 0.4576 meters

So, the vertical drop or the distance between point A and point B is approximately 0.4576 meters.

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I = 7 N-s

Explanation:

Impulse is defined as

I = ∆p = m(vf - vi)

We are given

m = 0.2 kg

vi = -10 m/s (to the left)

vf = +25 m/s (to the right)

Therefore, the impulse imparted on the puck is

I = (0.2 kg)[25 m/s - (-10 m/s)]

= (0.2 kg)(35 m/s)

= 7 N-s

Answer:

decigram milligram gram decagram kilogram