Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting thread of length 2.80 m. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.18 m away from a bulkhead.
(a) If the tension in the string is 2.10 N, what is the magnitude of q?
(b) What happens to the system as time passes? Explain.

The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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Answer:

sbdjhdjrjrjrjrjrbdhhrhejejejejejejejejdndndjsj

Answer: My hypothesis was that the future results of the experiment would show a correlation. According to my data, my hypothesis was correct. The file uploaded to this assignment shows that the graph is a correlation but not a 100% positive correlation because if you imagined there was a straight line there, the points would be completely aligned. The correlation is simply a “positive correlation”. Some of the difficulties I had when performing the experiment was distinguishing which type of luster was for each mineral because the light almost looked the same with other minerals. You might change the procedure to avoid this problem in the way of getting all the rest of the results for that specific mineral and then look at which of the graph with the answers was most alike and then you can see why the luster is that certain result in that data which is the correct one. A graphical analysis can be used to explore the relationship between any two scientific variables by changing the numerical data of the experiment into a graph, which is a much more effective and easier way of interpreting the gathered results. It's easier to visualize a graph data than read all the tables with numbers.

The graph is in the attachment below and the 6 minerals also with their names, their density, and their hardness

Answer:

Sporulation

the formations of spores from vegetative cells during unfavorable environmental conditions

Fragmentation

The asexual reproduction, where the body of the organism breaks into smaller pieces

Fragmentation: The breaking up of the body of organisms into two or more pieces or fragments on maturing, each of which subsequently can grow into a completely new organism is called fragmentation.

Definition of sporulation

: the formation of spores

sporulation refers to the formation of spores from vegetative cells during unfavorable environmental conditions. As such, it may be described as an adaptive response that allows the organism to survive given adverse conditions (radiation, extreme heat or cold, lack of nutrition etc).

Answer:

(i) 100 m/s²

(ii) 450 m

Explanation:

From the question,

Using,

(i) a = (v-u)/t................. Equation 1

Where a = acceleration of the drone, v = final velocity of the drone, u = Initial velocity of the drone, t = time.

Given: v = 300 m/s, u = 0 m/s (from rest), t = 3 s

Substitute these values into equation 1

a = (300-0)/3

a = 300/3

a = 100 m/s²

Hence the acceleration of the drone is 100 m/s²

(ii) using,

s = ut+at²/2.................... Equation 2

Where s = distance traveled by the drone.

also substitute the values above into equation 2

s = 0(3)+100(3²)/2

s = 50×9

s = 450 m

The ball needs to go at least  speed is 13 m/s per second to be able to clear the ceiling.

angle should you toss the ball 46.26°.

From the query, we learn that

We are 6.0 metres away from one home wall.

who is 6.0 metres from the wall across from you.

Both the throw and the catch take place one metre above the ground.

Assume that you and your companion are both 6.0 metres from the edge of the roof.

The Newtons equation for the distance is typically expressed numerically as

\(s=v*t+\frac{a}{2}*t^{2}\\5=0*t+4.9*t^{2}\\t=1.04\)

Therefore

\(2*t = 2.0s\)

Where

\(18=V_{x} *2.0\\V_{x} =8.9\)

And

\(5=V_{y} *1.04-4.9*1.04^{2}\\V_{y} =9.8\)

Therefore

\(V=\sqrt{V_{y}^{2}+V_{x} ^{2} } \\V=\sqrt{(9.8)^{2}+(8.9)^{2}} \\\V=13m/s\)

In order to determine the angle at which you should toss the ball, you must first calculate the distance between you and your friend. This is done by using the Pythagorean Theorem to calculate the hypotenuse of the right triangle formed by the two walls and the distance between you and your friend:

\(C = \sqrt (6.0m)^2 + (6.0m)^2 \\ = 8.485m\)

Now you can calculate the angle using trigonometry. Since the triangle is a right triangle, you can use the inverse tangent function to calculate the angle:

tan⁻¹\((\frac{6.0m}{8.485m})\) = 46.26°

Therefore, you should toss the ball at an angle of 46.26°.

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Explanation:

Force of gravity = G m1 m2 / r2

now double 'r'

Force = G m1 m2 / (2r) ^2

Force = 1/4  G m1 m2 / r^2     <=====this is 1/4 of the original force of gravity

Given:

The mass of the sample is

The initial temperature is

The final temperature is

The amount of heat is,

To find:

The specific heat capacity of the metal

Explanation:

Let the specific heat capacity is 'c'

The amount of heat for the temperature change is,

Substituting the values we get,

Hence, the specific heat capacity is

The electric potential energy decreases as the spheres move farther away from each other.

Since, they are like charges, the charged spheres will repel. Therefore, when it moves away, the distance between them increases, as a result the electric potential energy decreases.

As the two spheres separate from one another, the electric potential energy of the system will be transformed into kinetic energy. The movement of the spheres will be in opposite directions, away from one another.

The system's overall energy must remain constant according to the law of conservation of energy, but when the spheres separate from one another, potential energy is transformed into kinetic energy.

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1 N*m = 1 Joule

40 N*m = 40 joules

The general formula for the conservation of energy for both the hoop and the cylinder can be expressed as: Etotal = Ekinetic + Epotential

Energy is the capacity of a system or object to do work. It is the ability to cause change by transferring energy from one object to another. Energy can take many forms, such as kinetic energy (energy of motion), potential energy (stored energy), thermal energy (energy from heat), electrical energy (energy from the flow of electrons), chemical energy (energy stored in chemical bonds), and nuclear energy (energy stored in the nucleus of an atom).

Where Etotal is the total energy, Ekinetic is the kinetic energy and Epotential is the potential energy.

Therefore, the general formula for the conservation of energy for both the hoop and the cylinder can be expressed as:

Etotal = (1/2 mv2) + (mg * h)

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The average velocity of the particle between t = 2.0 s and t = 4.0 s is 4 m/2.0 s = 2.0 m/s.

Average velocity is the rate of change of an object's position, expressed as a vector quantity that tells both the speed and direction of the object's motion.

The average velocity of the particle between t = 2.0 s and t = 4.0 s can be calculated by taking the difference in the x-position of the particle at t = 4.0 s and t = 2.0 s, and dividing it by the difference in the time.
The x-position of the particle at t = 2.0 s is 4 m and the x-position of the particle at t = 4.0 s is 8 m.
Therefore, the difference in the x-position is 8 m - 4 m = 4 m.
The difference in time is 4.0 s - 2.0 s = 2.0 s. Therefore, the average velocity of the particle between t = 2.0 s and t = 4.0 s is 4 m/2.0 s = 2.0 m/s.

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Answer:

C from the liquid water to the solid ice

Explanation:

The direction of heat flow is from the liquid water to the solid ice. Thermal energy generally flows from a body at a high temperature to one at lower temperature values.

Heat will flow from the boiled water to the solid ice mass.

The thermal energy moves from the liquid water to the solid ice because heat energy moves from hotter body to colder body.

Thermal energy moves from hotter body to colder body so we know that in this experiment water is a hotter body whereas ice cubes are colder body so the heat energy will definitely moves from hot body to the cold body.

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The mechanical advantage of the crow bar is 3 while the velocity ratio is 4. The efficiency of the machine is 75%.

We know that a machine is any device that can be used to make work a lot much easier. Thus, the machine is the object that could make less effort to be applied in making a greater work to be done as we can see in this case we have here.

From the question, the pieces of information that we can get are;

Distance moved by Effort = 200 cm

Distance moved by load = 0.5 m or 50 cm

Velocity ratio = Distance moved by Effort/Distance moved by load

= 200 cm /50 cm

= 4

Mechanical advantage is found to be; Load/Effort

= 600 N/200 N

= 3

Efficiency = Mechanical advantage/ Velocity ratio * 100/1

= 6/4 * 100/1

=3/4 * 100/1

= 75%

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Answer:

v = 1.6 m/s

Explanation:

Given that,

Distance, d = 72 m

Time taken, t = 45 s

We need to find their average velocity. Average velocity of an object is given by total distance divided by total time taken.

\(v=\dfrac{d}{t}\\\\v=\dfrac{72\ m}{45\ s}\\\\v=1.6\ m/s\)

So, their average velocity is 1.6 m/s.

Answer: C

Explanation:

The characteristics and problems of telescopes we can find the correct answer to the question that the Hubble telescope helps to answer is:

           D) Are there more galaxies beyond the milky way

Telescopes are instruments that can perceive very small amounts of light and have very large magnifications, in general to be able to see objects increasingly weak in intensity, telescopes become larger and the observation times of the object increase.

When we increase the observation times, the problem is that atmospheric movement changes the observation conditions and makes it difficult to obtain good images. One way to solve the problem was with telescopes in near space, the environmental disturbance is eliminated.

When the Hubble telescope was placed in space, there were already many answers but they continue to wonder what the limit of the universe is, this telescope allowed us to observe a body much farther away than ground-based telescopes, which is why it answered the question how many and to where there are galaxies out of the milky way.

Let's review the statements given to see the correct ones;

A) False. Copernicus clarified that the Sun is the center of the solar system

B) False. The center of the universe is not known, but the sun is a star in one of the arms of the milky way that is not the center of the universe either.

C) False. It has been known for a century what the movement of the planets in the solar system

D) True. The telescope in space allowed us to expand the limit of vision of the universe and respond to where there are galaxies outside the Milky Way.

In conclusion with the characteristics and problems of telescopes we can find the correct answer to the question that the Hubble telescope helped to answer is:

      D) Are there more galaxies beyond the milky way

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W = -mgytotal = -mgh is the total work performed by the gravitational force. Ug = mgh represents the change in potential energy. A potential energy function depends on an object's position.

By taking the derivative of the potential, the force at every place may be determined if the potential energy function U(x) is known. This indicates graphically that if we have potential energy vs. position.

Potential energy and equilibrium are related in that in an equilibrium like this, the body's potential energy is lower. In this case, when the body is moved a short distance, the state generates a force that does not oppose the movement.

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Answer:

1 gram of matter contains: 299,792,458^2=8.99 x 10^13 Joules=~21,500 Tons of TNT explosives, which is almost exactly the size of the atomic bomb dropped on Nagasaki in WW2. Guest May 17, 2016 #2

Hope this helped!

Explanation:

Answer:

Some of the copper wire needs to be exposed so that the battery can make a good electrical connection. ... You need to do this because the direction of a magnet field depends on the direction of the electric current creating it. The movement of electric charges creates a magnetic field.

Explanation:

In an electromagnet, it must the wire be connected to the battery for the magnet to work the current is flowing through into the wire once it is introduced.

The magnetic field is defined as the field the magnetic materials generate or when an electric charge moves in a field region that generates the magnetic field.

As we know, the electricity is often used to generate a magnetic field in electromagnets.

The current is flowing through into the wire once it is introduced, from either a battery or maybe another source of electricity. The looped wire is magnetized as if it were a magnetic material as a function of the magnetic field created around it.

Thus, in an electromagnet, it must the wire be connected to the battery for the magnet to work the current is flowing through into the wire once it is introduced.

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Answer:

The value  is  \(\theta =407.3 \ radian\)

Explanation:

From the question we are told that

    The angular acceleration is  \(\alpha = (7t + 8) \ rad/ s^2\)

    The first time is  \(t_1 = 1.00 \ s\)

    The second time \(t_2 = 6.10 \ s\)

Generally the angular velocity is mathematically represented as

     \(w = \int\limits {\alpha } \, dt\)

=>  \(w = \int\limits {7t + 8 } \, dt\)

=>  \(w =\frac{ 7t^2}{2} + 8 t\)

Generally the angular displacement  is mathematically represented as

\(\theta = \int\limits^{t_2}_{t_1} { w} \, dt\)

=>  \(\theta = \int\limits^{t_2}_{t_1} { \frac{7t^2}{2} + 8t } \, dt\)

=>  \(\theta = { \frac{7t^3}{6} + \frac{8t^2}{2} } | \left \ t_2} \atop {t_1}} \right.\)

=> \(\theta = { \frac{7t^3}{6} + 4t^2} } | \left \ 6.10} \atop {1}} \right.\)

=> \(\theta =[ { \frac{7}{6}[6.10 ]^3 + 4[6.10]^2} } ] -[ { \frac{7}{6}[1 ]^3 + 4[1]^2} } ]\)

=> \(\theta =407.3 \ radian\)

Answer:

Explanation:

It's graph A because the pressure in the tire is increasing as the amount of air going into it increases. B says the pressure drops exponentially as air goes in, and C says that the pressure stays the same as air goes in. Pressure in a tire increases proportionally to the amount of air in it.

The average force of the racquet on the ball, given that the time the racquet is in contact with the ball is 0.004 seconds, is 261 N

The following data were obtained from the question:

We can easily obtain the average force of the racquet on the ball as follow?

F = m(v - u) / t

F = [0.058 ×(9 - -9)] / 0.004

F = [0.058 ×(9 + 9)] / 0.004

F = [0.058 × 18] / 0.004

F = 1.044 / 0.004

F = 261 N

Thus, we can conclude from the above calculation that the average force on the ball is 261 N

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1) The starting temperature of the gas is 288 K

b) When the pressure is doubled, the temperature is 576 K

We know that we have to use the ideal gas equation so as to be able to obtain the temperature of the starting of the gas and we know that;

Pressure = 200 kPa or 1.97 atm

Volume =  3000 cm3  or 3 L

Temperature = ?

Number of moles = mass/molar mass = 7 g/28 g/mol = 0.25 moles

Then we have;

PV = nRT

T = PV/nR

T =  1.97 * 3/0.25 * 0.082

T = 5.91/0.0205

T = 288 K

If the pressure doubles and we have;

P1/T1 = P2/T2

P1T2 = P2T1

T2 = 2(1.97) * 288/1.97

T2 = 576 K

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Answer:

14,728,560 feet

Explanation:

1 foot is 5280 feet multiply by 2789.5 and get this

The two reasons early astronomers developed the geocentric model of the solar system are:

C. The model could explain the apparent motions of the Sun and Moon across the sky.

D. The model could explain the apparent backward motion of some of the planets in the sky.

The geocentric model, also known as the Ptolemaic model, was a model of the solar system in which the Earth was at the center and the Sun, Moon, and planets revolved around it. This model was developed by the ancient Greeks and was widely accepted for many centuries. It was able to explain the apparent daily motion of the stars and the annual motion of the Sun across the sky, as well as the apparent backward motion of some of the planets, known as retrograde motion. However, it was eventually superseded by the heliocentric model, which placed the Sun at the center of the solar system and was able to better explain the observed motions of the planets.

Answer:

C And A

Explanation:

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(a) The elevator is be moving upwards and accelerating upwards.

(b) The acceleration of the student is 0.5 m/s².

The net force acting on the elevator is determined by applying Newton's second law of motion as shown below.

F (net) = Ws + We ( when the elevator is moving upwards )

F (net) = Ws - We ( when the elevator is moving downwards)

where;

Since the resultant force of the elevator is greater than the weight of the student, the elevator must be moving upwards.

The mass of the student = 600 N / 9.8 m/s² = 61.22 kg

The acceleration of the student = ( 630  N - 600 N ) / ( 61.22 kg )

= 0.5 m/s²

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(a) The amplitude of the wave is 0.2 m.

(b) The period of the wave is  4 s.

(c) The wavelength of the wave is 100 m.

(a) The amplitude of the wave is the maximum displacement of the wave.

amplitude of the wave = 0.2 m

(b) The period of the wave is the time taken for the wave to make one complete cycle.

period of the wave = 5.5 s - 1.5 s = 4 s

(c) The wavelength of the wave is calculated as follows;

λ = v / f

where;

f = 1/t = 1 / 4s = 0.25 Hz

λ = ( 25 m/s ) / 0.25 Hz

λ = 100 m

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The magnitude of the average force exerted by the floor on the ball during the collision is 215 N, and the direction is upward.

What is Potential Energy?

Potential energy is the energy that an object possesses due to its position or configuration relative to other objects, or due to the configuration of its internal components. It is a form of energy that is associated with the forces that act on an object, such as gravity, electric forces, and magnetic forces.

(a) To determine the impulse delivered to the ball by the floor, we can use the principle of conservation of energy to relate the ball's potential energy at the initial height to its potential energy at the rebound height, taking into account the loss of energy due to the collision with the floor. We can then use the impulse-momentum theorem to relate the impulse to the change in momentum of the ball during the collision.

The initial potential energy of the ball is given by:

PEi = mgh = (0.215 kg)(9.81 m/s^2)(19.5 m) = 41.6 J

At the rebound height, the potential energy is:

PEf = mgh = (0.215 kg)(9.81 m/s^2)(15.0 m) = 31.7 J

The loss of energy due to the collision is:

ΔPE = PEi - PEf = 9.9 J

This energy loss is due to both the work done by the force of gravity during the downward motion and the work done by the force of the floor during the upward motion. However, since the ball rebounds to a height that is less than its initial height, we know that the impulse delivered by the floor must be in the downward direction, opposite to the direction of the ball's motion during the collision.

Using the impulse-momentum theorem, we can write:

J = Δp = mΔv

where J is the impulse delivered by the floor, Δp is the change in momentum of the ball during the collision, and Δv is the change in velocity of the ball during the collision. Since the ball is moving downward before the collision and upward after the collision, we can write:

Δv = vf - vi = (15.0 m/s) - (-15.0 m/s) = 30.0 m/s

where vi is the initial velocity of the ball (before the collision) and vf is the final velocity of the ball (after the collision).

Thus, the impulse delivered to the ball by the floor is:

J = mΔv = (0.215 kg)(30.0 m/s) = 6.45 kg · m/s (downward)

So, the magnitude of the impulse delivered to the ball by the floor is 6.45 kg · m/s, and the direction is downward.

(b) To determine the average force exerted by the floor on the ball during the collision, we can use the definition of impulse as the product of force and time, and the fact that the ball is in contact with the floor for a known amount of time.

We know that the ball is in contact with the floor for 0.0300 seconds. Therefore, the average force exerted by the floor on the ball during the collision is:

Favg = J / Δt

where Δt is the time interval during which the impulse is delivered. In this case, Δt is equal to the contact time, which is 0.0300 seconds.

Thus, the average force exerted by the floor on the ball is:

Favg = J / Δt = (6.45 kg · m/s) / (0.0300 s) = 215 N (upward)

So, the magnitude of the average force exerted by the floor on the ball during the collision is 215 N, and the direction is upward.

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