ANSWER QUICK 30 POINTS
What force controls the movement of the planets around the sun, holds together stars grouped in galaxies, and galaxies grouped in clusters? Thoroughly explain your answer, making sure to include an example and describe how this force keeps planets in orbit. Make sure to write at least 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words (pls dont just take my points :( )

The ball's weight will be precisely balanced by the electric field is E = 12.25 x 10³ N/C = 12.25 KN/C

The electrostatic force caused by the electric field must be equal to the weight of the body or charge in order to balance the object's weight. Therefore,

Weight = Electrostatic Force

E q = mg

where,

Electric field = (E) =?

5 x 103 kg is the mass of the charge, or m.

g = 9.8 m/s2 is the acceleration caused by gravity.

Q equals the charge's magnitude, which is 4 C (4 x 106 C).

Therefore,

E(4 x 10⁻⁶ C) = (5 x 10⁻³ kg)(9.8 m/s²)

E = 0.049 N/4 x 10⁻⁶ C

E = 12.25 x 10³ N/C = 12.25 KN/C

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Answer: 225 V

Explanation:

Given:

Secondary voltage,V2 = 150v

Resistance is connected across secondary winding,∴R2 = 20Ω

Supply current, ie, I1 = 5A

\(\text{Now, secondary current,} \ $I_{2}=\frac{V_{2}}{R_{2}}=\frac{150}{20}=7.5$$$\therefore I_{2}=7.5 \mathrm{~A}$$For Transformers, we have $\frac{N_{2}}{N_{1}}=\frac{V_{2}}{V_{1}}=\frac{I_{1}}{I_{2}}$ so, Taking $\frac{N_{2}}{N_{1}}=\frac{l_{1}}{l_{2}}$ inserting all given \& obtained values, we get $\frac{N_{2}}{N_{1}}=\frac{5}{7.5}$$$\therefore \text { Turns ratio }=\frac{N_{1}}{N_{2}}=\frac{7.5}{5}=\frac{3}{2}=3: 2$$\)

\(\text{Again taking,}\frac{N_{1}}{N_{2}}=\frac{V_{2}}{V_{1}}$ \\So, \\$V_{1}=\frac{N_{1}}{N_{2}} V_{2}\\$ inserting all values, we get, $V_{1}=\frac{7.5}{5} * 150=225$\\Therefore, \fbox{Primary voltage, {$V_{1}=225 \mathrm{~V}$}}\)

Answer:

Answering the following questions will help you to focus on the outcomes of these experiments:

1.How does the length to height ratio (the IMA) of trial 1 compare to trial 2?

= Trial 1 is 5.09, and Trial 2 is 3.25. Trial 1 is higher because the height of the trial is less than trial 2.

2.Why is the actual mechanical advantage less than the ideal mechanical advantage in each of the trials?

= It is because the machine's ideal mechanical advantage reflects the increase or decrease in force that would have occurred without friction. It is always greater than the actual mechanical advantage because all machines have to overcome friction.

3.If a machine was 100% efficient, how would the AMA compare to the IMA?

= In any real machine, some of the efforts are used to overcome friction. Thus, the resistance force ratio to the effort (AMA) is less than the (IMA).

A frictionless machine would have an efficiency of 100%.

A tug-of-war that results in one team pulling the other across the line is an example of reaction force.

A reaction force  can be described as the consequence of an action force which is opposite in direction.

It should be noted that the  Newton's third law of motion is the one that deals with these two forces, which  can be considered as the action and reaction forces however the Newton's third law made us to understand that for every action, there is an equal and opposite reaction, hence the case above can be seen as an example of reaction force.

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Answer:

Solute

Solvent

Saturation

Explanation:

A great deal of cocoa mix on the surface. Cocoa is the solute. Water is the solvent. The solution has reached the saturation.

The saturation is the state at which the solute dissolves no more.

The liquid is more in quantity is the solvent which is water here. The cocoa is added next, which is the solute generally less in quantity than solvent.

The addition of cocoa is continued till it stops dissolving. This state is reached at saturation.

Therefore, Cocoa is the solute. Water is the solvent. The solution has reached the saturation.

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Answer:

I don't know the answer.

Explanation:

Im not smart <3

Answer:

Following features are similar in longitudinal and transverse waves: Both waves are mechanical waves. Both transport energy without transporting matter. Particles oscillate about their mean position in both waves.

Answer:

Your awnser is B. Increase

Explanation:

Answer:

divide

Explanation:

u should divide the velocity by time interval because a=vf-vi/t

Answer:

a. 0.122 ft b. -70 Btu/h ft² c. 633.33 °F

Explanation:

a. Since the rate of heat loss dQ/dt = kAΔT/d where k = thermal conductivity, A = area, ΔT = temperature gradient and d = thickness of insulation.

Now [dQ/dt]/A = kΔT/d

Given that [dQ/dt]/A = rate of heat loss per unit area = -900Btu/h ft², k = 0.10 Btu/h ft ℉(for asbestos), ΔT = T₂ - T₁ = 500 °F - 1600 °F = -1100 °F. We need to find the thickness of asbestos, d. So,

d = kΔT/[dQ/dt]/A

d = 0.10 Btu/h ft ℉ × -1100 °F/-900Btu/h ft²

d = 0.122 ft

b. If the 3 in thick Kaolin is added to the outside of the asbestos, and the outside temperature of the asbestos is 250℉, the heat loss due to the Kaolin is thus

[dQ/dt]/A = k'ΔT'/d'

k' = 0.07 Btu/h ft ℉(for Kaolin), ΔT' = T₂ - T₁ = 250 °F - 500 °F = -250 °F and d' = 3 in = 3/12 ft = 0.25 ft

[dQ/dt]/A = 0.07 Btu/h ft ℉ × -250 °F/0.25 ft

[dQ/dt]/A  = -70 Btu/h ft²

c. To find the temperature at the interface, the total heat flux equals the individual heat loss from the asbestos and kaolin. So

[dQ/dt]/A = k(T₂ - T₁)/d + k'(T₃ - T₂)/d' where  [dQ/dt]/A = -900Btu/h ft², k = 0.10 Btu/h ft ℉(for asbestos), k' = 0.07 Btu/h ft ℉(for Kaolin), T₁ = 1600 °F, T₂ = unknown and T₃ = 250℉.

Substituting these values into the equation, we have

-900Btu/h ft² = 0.10 Btu/h ft ℉(T₂ - 1600 °F)/0.122 ft + 0.07 Btu/h ft ℉(250℉ - T₂)/0.25 ft

-900Btu/h ft² = 0.82 Btu/h ft ℉(T₂ - 1600 °F) + 0.28Btu/h ft ℉(250℉ - T₂)

-900 °F = 0.82(T₂ - 1600 °F) + 0.28(250℉ - T₂)

-900 °F = 0.82T₂  - 1312°F + 70 °F - 0.28T₂

collecting like terms, we have

-900 °F + 1312°F - 70 °F = 0.82T₂   - 0.28T₂

342 °F = 0.54T₂

Dividing both sides by 0.54, we have

T₂ = 342 °F/0.54

T₂ = 633.33 °F

The thickness of asbestos required is 0.122 ft.

The heat flux will be -70 Btu/h ft²

And the temperature of the interface is 633.33 °F.  

(i) the rate of heat loss :

dQ/dt = kAΔT/d

where k = thermal conductivity, A = area, ΔT = temperature gradient, and

d = thickness of insulation.

[dQ/dt]/A = kΔT/d

Given that [dQ/dt]/A = rate of heat loss per unit area = -900Btu/h ft²,

k = 0.10 Btu/h ft ℉,

ΔT = 500 °F - 1600 °F = -1100 °F

We have to find the thickness of asbestos that is d.

d = kΔT/[dQ/dt]/A

d = 0.10 Btu/h ft ℉ × -1100 °F/-900Btu/h ft²

d = 0.122 ft is the thickness required.

(ii) a 3-in thick Kaolin is added to the outside of the asbestos

outside temperature of the asbestos is 250℉,

the heat loss due to the Kaolin is:

[dQ/dt]/A = k'ΔT'/d'

k' = 0.07 Btu/h ft ℉(for Kaolin), ΔT' = T₂ - T₁ = 250 °F - 500 °F = -250 °F and d' = 3 in = 3/12 ft = 0.25 ft

[dQ/dt]/A = 0.07 Btu/h ft ℉ × -250 °F/0.25 ft

[dQ/dt]/A  = -70 Btu/h ft²

(iii) temperature at the interface

the total heat flux :

[dQ/dt]/A = k(T₂ - T₁)/d + k'(T₃ - T₂)/d'

where  [dQ/dt]/A = -900 Btu/h ft²,

k = 0.10 Btu/h ft ℉  (for asbestos),

k' = 0.07 Btu/h ft ℉  (for Kaolin),

T₁ = 1600 °F and T₃ = 250℉.

-900 = 0.10(T₂ - 1600 °F)/0.122 + 0.07(250℉ - T₂)/0.25

-900 = 0.82(T₂ - 1600 °F) + 0.28(250℉ - T₂)

-900 °F = 0.82(T₂ - 1600 °F) + 0.28(250℉ - T₂)

-900 °F = 0.82T₂  - 1312°F + 70 °F - 0.28T₂

-900 °F + 1312°F - 70 °F = 0.82T₂   - 0.28T₂

342 °F = 0.54T₂

Dividing both sides by 0.54, we have

T₂ = 342 °F/0.54

T₂ = 633.33 °F

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The Answer to the question: The sun emits electromagnetic waves at many frequencies, but mostly in the infrared, visible, and ultraviolet spectrums. What kind of energy is this?  Is......     radiant

The energy emitted by sun in the form of electromagnetic waves is the radiant energy. So, the second option is correct.

Electromagnetic wave is defined as the waves that are formed as a result of the vibrations between electric and magnetic fields.

Here,

The sun emits electromagnetic waves at many frequencies, but mostly in the infrared, visible and ultraviolet spectrums.

The energy from the sun that reaches are in the form of solar radiations. These solar radiations carry a large amount of energy and are a part of electromagnetic energy spectrum.

The solar radiation consists of  radiations of 40% at the wavelengths of infrared, 50% at the wavelength of visible light and 10% at the wavelength of ultraviolet waves.

The ultraviolet radiations has an important role in the formation of earth's upper atmosphere.

These radiations are responsible for the heating and temperature effects on the earth.

Hence,

The energy emitted by sun in the form of electromagnetic waves is the radiant energy.

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Answer:

Ans : C

Explanation:

C. The force of gravity acting on the chair

Answer:

D. the force from the chair on the student

Explanation:

Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.

This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself. 

Hope this helps :)

Answer:

In series

Explanation:

Ammeter is used in electric circuits to measure the amount electric current that passes through the circuit.

Now, as a rule, this ammeter is always connected in series with the wires in the circuit where the current is being measured so that sufficient current can pass through it.

Answer:

Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant.

In this state, Kinetic energy is equal to half of the product mass and velocity. SI unit is joules. So it's if the mass is doubled then the kinetic energy also gets doubled.

For an image formed 16 cm behind a convex lens whose focal length is 8 cm, the position of the object is mathematically given as

o=16cm

Question Parameter(s):

An image is formed 16 cm behind a convex lens

focal length is 8 cm

Generally, the equation for the   is mathematically given as

1/f=1/o+1/i

Therefore

1/8=1/o+1/16

o=16cm

In conclusion, the position is

o=16cm

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Moving up the kinetic chain (from one segment analysis to the next) in inverse dynamics is possible because of the chain rule of calculus.  

A kinetic chain is a series of interconnected parts or components in a system that are connected by links, joints, or other means, and that work together to produce movement or motion. A kinetic chain can be found in many different types of systems, including mechanical systems, biological systems, and engineering systems. In mechanical systems, a kinetic chain might be used to transfer motion or power from one part of the system to another.

In biological systems, a kinetic chain might be used to transmit signals or movements between different parts of the body. For example, the muscle-tendon-bone system is a kinetic chain that allows the muscles to generate force and move the body.

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Correct Question:

Moving up the kinetic chain (from one segment analysis to the next) in inverse dynamics is possible because of _______.

Answer:

Camera flash units charge a capacitor and then discharge it through a light bulb. When the unit flashes, the energy stored in the capacitor is released in the form of radiant energy (a flash of light). Flash units waste some of the energy in the form of heat, so is an upper limit for estimating the radiant energy.

Explanation:

cut the square and make it a triangle

Answer:

You need to provide the question and (if it has them) answer options for the question. Once you have done that, delete my response so I may be able to answer your question faster than normal.

Explanation:

An object's mass remains unchanged everywhere while the weight of an object depends on gravity, it is a measurement of how much gravity has an impact on an object. Therefore, an object’s mass, rather than its weight is used to indicate the amount of matter it contains.

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Answer:

wY

Explanation:

it increases my mercury righy basically also on the atmosphere pressure

The final temperature of water is equal to 50.9999°C

Given the following data:

To determine the final temperature of water:

Mathematically, quantity of heat is given by the formula;

\(Q=mc\theta\)

Where:

Substituting the given parameters into the formula, we have;

\(5000=2.38892 \times 10^{-2}\times 4186 \times \theta\\\\5000=100.0001912 \theta\\\\ \theta=\frac{5000}{100.0001912} \\\\ \theta=49.9999^{\circ}C\)

For the final temperature:

\(\theta = T_2 - T_1\\\\T_2 = \theta+T_1\\\\T_2 = 49.9999 + 50\)

Final temperature = 50.9999°C

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Answer:

Explanation:

3.011 x 10^24 atoms

Answer:

jskskskssksksksskssksksksksks

The sound signal helps to caution and let other people know the exact

position or location during sailing in limited visibility conditions.

Sailors are in which charge of controlling and movement of ships. In limited

visibility conditions such as during fogs, one prolonged blast plus two short

blasts every two minutes are done.

This helps to alert people and other sailors of their location at sea to prevent

accidents and death.

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The sound signal helps to know the exact location during sailing in foggy conditions.

Sailors are the in charge of controlling and movement of ships. In limited visibility conditions such as fogs, one prolonged blast plus two short blasts every two minutes are done.

This helps to caution people and other sailors around their location at the sea to prevent accidents and death.

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Answer:

We do not have the information of the pendulum, so i will answer in a general way.

First, as you know, the total energy can be written as:

E = U + K

Where:

U = potential energy

K = kinetic energy.

Now, by the conservation of energy, we know that E does not change.

This means that if U increases an amount x, then K must decrease by the same amount.

Now, at the maximum height of the pendulum, the velocity is zero, this means that in this point the kinetic energy is 0j.

E = 0 + U

E = U.

Another thing that you may know about pendulums is that, if the initial displacement is by an angle θ, then the angle between the string and the vertical can never be more than θ.

And we know that:

U = m*g*h

in this case, we can write h, the maximum height, as:

h = L*(1 - cos(θ))

Where:

L is the length of the string, g is the gravitational acceleration and m is the mass of the pendulum.

Then the total energy of the pendulum is:

E = m*g*L*(1 - cos(θ))

And we had that:

E = K + U = m*g*L*(1 - cos(θ))

Then, if in a given point we have U = 50j, the kinetic energy must be:

K + 50j = m*g*L*(1 - cos(θ))

K = m*g*L*(1 - cos(θ)) - 50j

Orbital velocity of satellite

\(v = \sqrt{ \frac{gm}{r} } \)

Radius of new orbit r' =6r

Thus new orbital velocity of satellite:

\(v = \sqrt{ \frac{gm}{6r} } = \frac{v}{ \sqrt{6} } \)

For satellites in circular orbits, the relationship between orbital velocity and altitude is strict. The task of a satellite launch rocket is to release the satellite at a suitable place in space, with the appropriate speed and direction of movement to put it in the desired orbit.

How a satellite stays in orbit can be thought of in two equivalent ways, both of which explain the relationship between the satellite's altitude and velocity.

The motion of the satellite can be seen as creating a centrifugal force that opposes the gravitational pull. For example, imagine attaching an object to a string and swinging it in a circle. The object is pulling outward against the string, and that outward force (centrifugal force) becomes greater the faster the object swings. At the right speed, the centrifugal force of the satellite due to motion around the earth just balances the gravitational pull, and the satellite remains in orbit.

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Answer:

\(I=\sqrt{} \frac{P}{R}\)

Explanation:

Answer:

0.72 atm

Explanation:

Given that the atmospheric pressure on a mountain is 550 mmHg.

Where 1 atm is equal to 760 mmHg.

To Convert millimetre mercury (mmHg) into atmospheric pressure units (atm) , divide the magnitude of pressure by 760. That is,

Pressure = 550/760

Pressure = 0.724 atm

Therefore, pressure in atm is 0.72 atm in two significant figures