A student wants to make an analogy to help her remember the characteristics of the planets. Which analogy makes the most sense?

The inner planets are like cotton candy and the outer planets are like hard butterscotch candy.
The outer planets are like bowling balls and the inner planets are like basketballs.
The inner planets are like hard butterscotch candy and the outer planets are like cotton candy.
The outer planets are like roses and the inner planets are like daisies.

As the diameter of the wire approaches to zero, the resisitance approaches  infinity.

Electrical resistance is the physical capacity of any body to oppose the flow of electric current even when there is an applied potential difference, capacity calculated by Ohm's First Law, and, according to the International System of Units (IS), is measured in ohms.

With that being said, and knonwing that:

R = Resistance; p = Resistivity; L = Length; d = Diameter

It is possible to calculate the resistance of the wire by:

\(R = p\frac{L}{A}\)

Where A is calculated by:

\(A = \frac{\pi d^{2} }{4}\)

Changing in the first formula:

\(R = p\frac{L}{\pi d^{2} } \\\\R = p\frac{4L}{\pi d^{2} }\)

Knowing that when the diameter tends to zero resistance tends to infinity, it is possible to say that resistance of the wire will tend to infinity when the diameter approaches zero.

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Answer:

The resistance approaches infinity.

Explanation:

100% Correct

Answer:

sa64

Explanation:

If the cord is subjected to a constant force and the 15-kg smooth collar starts from rest at A, determine the velocity of the collar when it reaches point B.

Neglect the size of the pulley. The acceleration of the 15-kg collar can be found as follows: F = ma => a = F/m ... (1)where F is the constant force applied and m is the mass of the collar.

Let v be the velocity of the collar when it reaches point B. Using the formula for the velocity-time relationship, we have v = u + at ... (2)where u is the initial velocity of the collar at A which is zero. Substituting (1) into (2), we have v = at ... (3)Substituting the value of a from (1) into (3), we get v = F/m t ... (4)where t is the time taken for the collar to travel from A to B and is given by:t = s/v ... (5)where s is the distance between A and B.

Since the cord is assumed to be inextensible, s is equal to twice the distance AB (AB = BC). Let us now compute the tension in the cord at point A. The tension in the cord is equal to the force F as shown in the figure below: Therefore, we have  T = F = 35 N ... (6)Since the pulley is smooth, the tension in the cord is the same throughout its length. Thus, we have T = T' ... (7)where T' is the tension in the cord at point B.

Substituting (6) and (7) into the force equation for the collar gives us: T - mg = ma => T' - mg = ma ... (8)where g is the acceleration due to gravity. Substituting the value of a from (1) into (8), we get:T' - mg = F/m => T' = mg + F/m ... (9)Substituting (9) into (7), we get:mg + F/m = T = 35 N => mg = 35 - F/m ... (10)Substituting the values of m and F into (10), we get:mg = 35 - (5 kg)(7 m/s²)/(15 kg) = 28 - 2/3 N ... (11)Substituting the value of g from (11) into (9), we get:T' = 15(28 - 2/3) + 7 = 425 - 2/3 N ...

(12)Substituting (11) and (12) into (4), we get:v = (425 - 2/3)/(15) t ...

(13)Substituting the value of s from the figure above, we get:s = 2(0.8 m) = 1.6 m ... (14)Substituting (13) and (14) into (5), we get:t = s/v = (1.6 m)/(425 - 2/3)(15) = 0.025 s (approx)Substituting (13) and (15) into (4), we get:v = (425 - 2/3)/(15) (0.025) = 0.567 m/s (approx)Therefore, the velocity of the collar when it reaches point B is approximately 0.567 m/s.

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Two weights are connected by a massless wire and pulled upward with a constant speed of 1.50 m/s by a vertical pull P. The tension in the wire is T The relationship between T and P is that T = P + 125N, which is equivalent to answer choice D. The correct answer is D) P=T+25N.

This can be determined by analyzing the forces acting on the system. Since the weights are being pulled upward at a constant speed, the net force acting on them must be zero.
The forces acting on the weights are their respective weights (mg), where m is the mass of the weight and g is the acceleration due to gravity, and the tension in the wire (T). The vertical pull P also acts on the system.
Using Newton's second law (F=ma) and setting the net force equal to zero, we can write:
T - m1g - m2g - P = 0
Solving for T, we get:
T = m1g + m2g + P
Substituting in the given values of m1, m2, and g, we get:
T = 50N + 75N + P
Simplifying, we get:
T = P + 125N

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Cardiovascular drug classes are Beta-blockers, Diuretics, Calcium channel blockers, and ACE inhibitors. The correct answer is options are A, B, D, and F.

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The correct question would be as

Which of the following are cardiovascular drug classes? Select all that apply.

A) Beta-blockers

B) Diuretics

C) Antibiotics

D) Calcium channel blockers

E) Antidepressants

F) ACE inhibitors

dP/dt = (0.831 - 0.2P) / 100, where P represents pressure (in kilopascals).

This equation represents the rate at which the pressure is changing with the given conditions of temperature and volume.

To find the rate at which the pressure is changing, we need to use partial derivatives. Given the equation PV = 8.31T, we can differentiate both sides of the equation with respect to time t.

Differentiating both sides with respect to time t, we get:

P(dV/dt) + V(dP/dt) = 8.31(dT/dt)

Now, let's substitute the given values:

dT/dt = 0.1 K/s (rate of temperature change)

dV/dt = 0.2 L/s (rate of volume change)

T = 300 K (temperature)

V = 100 L (volume)

Plugging in the values into the equation:

P(0.2) + 100(dP/dt) = 8.31(0.1)

0.2P + 100(dP/dt) = 0.831

Now, we can solve for dP/dt:

100(dP/dt) = 0.831 - 0.2P

dP/dt = (0.831 - 0.2P) / 100

Therefore, the rate at which the pressure is changing when the temperature is 300 K and increasing at a rate of 0.1 K/s, and the volume is 100 L and increasing at a rate of 0.2 L/s is given by:

dP/dt = (0.831 - 0.2P) / 100

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ok byy make me brilliant

Answer:

the answer is yours a calculated

Answer:

(a) h = 5.1 m

(b) v = 14.13 m/s

Explanation:

(a)

We will use the law of conservation of energy. For this situation it states that:

Loss in Potential Energy of Sphere = Gain in Kinetic Energy of the Sphere

mgh = (1/2)mv²

h = v²/2g   --------------- equation (1)

where,

h = height = ?

v = speed at lowest point = 10 m/s

g = 9.8 m/s²

Therefore,

h = (10 m/s)²/(2)(9.8 m/s²)

h = 5.1 m

(b)

using the equation (1)

h = v²/2g

v = √2gh

where,

v = velocity = ?

g = 9.8 m/s²

h = height = 2(5.1 m) = 10.2 m

Therefore,

v = √[2(9.8 m/s²)(10.2 m)]

v = 14.13 m/s

The height from which the sphere was released is 5.1 m

When the height is doubled, the speed of the sphere becomes 14.14 m/s.

The given parameters:

The height from which the sphere was released is calculated as follows;

\(P.E = K.E\\\\mgh = \frac{1}{2}mv^2\\\\gh = \frac{1}{2}v^2\\\\h = \frac{v^2}{2g}\\\\h = \frac{(10)^2}{2(9.8)} \\\\h = 5.1 \ m\)

When the height is doubled, the speed of the sphere becomes;

\(h = \frac{v^2}{2g} \\\\v^2 = 2gh\\\\v = \sqrt{2gh} \\\\v = \sqrt{2 \times 9.8 \times (2 \times 5.1)} \\\\v = 14.14 \ m/s\)

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The refrigerant undergoes this process with a rise in volume and enthalpy but no change in pressure or temperature.

A thermodynamic cycle called the refrigeration cycle is used to remove heat from a particular location that you want to chill.

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Answer:

I feel that people hurt the land and are destroying. I think they aren't using the land for the right reasons.

Answer:

answers are located on the picture attached to this answer

Explanation:

Answer:

ggggggg

Explanation:

Answer:  14 inches.

Explanation: The radius of this circle is 7 inches, so the diameter is 2(7) = 14 inches. The diameter is 14 inches.

1a) The total energy stored when all three weights are raised by 70 cm is 80.5 J.

1b) The height of the tank is 2 m.

2b) The potential energy is converted into kinetic energy when the water flows out of the taps 6.32 m/s.

3a) The mass of water that goes over the falls every second is 1 x 10⁶ kg.

3b) The gravitational potential energy of 1 kg of water at the top of the falls 1000 J.

3c) The speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy is 44.72 m/s.

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

1a) To calculate the amount of energy stored in the three weights, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

For the 4.5 kg weight:

E = 4.5 x 10 x 0.7 = 31.5 J

For each of the 3.5 kg weight:

E = 3.5 x 10 x 0.7 = 24.5 J

Thus, the total energy stored when all three weights are raised by 70 cm is:

31.5 J + 24.5 J + 24.5 J = 80.5 J

1b) To calculate how far the 4.5 kg weight must be lifted to store 45 J of energy, we use the formula:

E = mghh = E/mg = 45 / (4.5 x 10) = 1 m2a)

To calculate the gravitational potential energy stored in the water in the tank when it is full, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

The mass of 1 litre of water is 1 kg and the tank can hold 200 litres of water. Therefore, the total mass of water in the tank is:

Mass = 200 kg

The height of the tank is 2 m.

Therefore, the gravitational potential energy stored in the water in the tank is:

E = mgh = 200 x 10 x 2 = 4000 J

Assumptions made in the answer:

We have assumed that the tank is full.

2b) To calculate the speed at which the water would come out of the bathroom and kitchen taps, we use the formula given below:

PE = KEPE = mghKE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that the potential energy of the water in the tank is converted into kinetic energy when the water flows out of the taps, the potential energy stored in the water in the tank is given by:

PE = mgh = 200 x 10 x 2 = 4000 J

The potential energy is converted into kinetic energy when the water flows out of the taps.

Therefore, KE = 1/2mv²v² = 2KE/mv² = 2(4000)/200 = 40 m²/s²v = √(40) = 6.32 m/s (speed of the water coming out of the taps)

3a) To calculate the mass of water that goes over the falls every second, we use the formula given below:

Mass = Volume x Density

Where,Volume = 1000 m³/s, Density = 1000 kg/m³, Mass = 1000 x 1000 = 1000000 kg = 1 x 10⁶ kg

3b) To calculate the gravitational potential energy of 1 kg of water at the top of the falls, we use the formula:

E = mgh

Where,m = 1 kg, g = 10 N/kg, h = 100 m, E = 1 x 10 x 100 = 1000 J

3c) To calculate the speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy, we use the formula given below:

PE = KEP

E = mgh

KE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that all the potential energy is converted into kinetic energy when the water reaches the bottom,

PE = KEKE = mghv² = 2mghv² = 2(1)(10)(100)v² = 2000v = √(2000) = 44.72 m/s

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) To calculate the total energy transferred per second as the GPE stored in the water falling in one second is transferred to other energy stores, we use the formula given below:

Power = Energy / Time

Where,Power = 1 x 10⁶ x 10 x 100 = 1 x 10⁹ W = 1 GW (assuming that 1 m³ of water falls every second)3f)

The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

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A monatomic gas and a diatomic gas have equal numbers of moles and equal temperatures. Ratio Q diatomic/Q monatomic is 7/5.

The heat (Q) required to increase the temperature of a gas at constant pressure (i.e., heating it) can be calculated using the formula:

\(Q = nCp $\Delta$ T\)

here n is the number of moles of the gas, Cp is the molar specific heat capacity at constant pressure, and ΔT is the change in temperature. Since the two gases have equal numbers of moles and equal temperatures, ΔT is the same for both gases.

For a monatomic gas, Cp = (5/2)R, where R is the gas constant. For a diatomic gas, Cp = (7/2)R. Therefore, the ratio of the specific heats is:

Cp,diatomic/Cp,monatomic = (7/2)R / (5/2)R = 7/5

During the heating process, the gases are both heated at constant pressure until their volume doubles. Since the pressure is constant, we can use the formula for the work done on a gas at constant pressure:

W = -PΔV

where P is the pressure and ΔV is the change in volume. The negative sign indicates that work is done on the gas (i.e., the gas absorbs energy) when its volume increases.

Since the volume doubles, ΔV = V - V0 = V, where V0 is the initial volume and V is the final volume. Therefore, the work done on the gas is:

W = -PΔV = -P(V - V0) = -P(V/2) = -(1/2)PV

The change in internal energy of the gas is equal to the heat added to the gas minus the work done by the gas, according to the first law of thermodynamics:

ΔU = Q - W

Since the pressure is constant, the change in internal energy is equal to the heat added to the gas:

ΔU = Q

Therefore, the heat added to the gas is:

Q = ΔU = (3/2)nRΔT

where we have used the fact that the change in internal energy of an ideal gas is proportional to the number of moles and the temperature change, with a proportionality constant of (3/2)R for both monatomic and diatomic gases.

Substituting the values and simplifying, we get:

Qdiatomic/Qmonatomic = (ΔU)diatomic / (ΔU)monatomic

= [(3/2)nRΔT]diatomic / [(3/2)nRΔT]monatomic

= (Cp,diatomic/Cp,monatomic)ΔT

= (7/5)ΔT

Since ΔT is the same for both gases, the ratio of the heat added to the diatomic gas to the heat added to the monatomic gas is simply 7/5.

Therefore, the ratio Qdiatomic/Qmonatomic is 7/5. This means that the diatomic gas requires more heat to be added to it than the monatomic gas in order to achieve the same temperature increase, when heated at constant pressure and with the same number of moles and temperature. This is because the diatomic gas has more degrees of freedom (i.e., more ways to store energy) than the monatomic gas, due to its additional internal vibrations.

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The blue objects absorb most wavelengths but reflect light at about 450 nm. This phenomenon relates to the colors of objects.

When the sunlight falls on an object, some of the light is absorbed, and the rest of the light is reflected. Objects appear to be a certain color because they absorb some colors of light and reflect others. Some objects appear blue because they absorb all colors of light except blue.

Blue light has a shorter wavelength than other colors of light, so it is scattered more in the Earth's atmosphere. The sky appears blue because the shorter blue wavelengths are scattered in all directions and are more likely to reach the observer's eye.

The light that is reflected off blue objects is at a wavelength of around 450 nm. When white light passes through a prism, it splits into the colors of the spectrum.

Violet light has the shortest wavelength, and red light has the longest wavelength. Between violet and green, the colors blend to form blue. So, if blue objects reflect light at around 450 nm, that means they reflect blue light.

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Answer:

The horizontal component of the force, \(F_x= 34.24 \ N\)

The  vertical component of the force, \(F_y=7.28 \ N\)

Explanation:

Given;

Force on the rope, F = 35 N

angle between the rope and the horizontal = 12 °

The horizontal component of the force is given by;

\(F_x = Fcos \theta\\\\F_x = 35cos(12^0)\\\\F_x = 34.24 \ N\)

The vertical component of the force is given by;

\(F_y = Fsin\theta\\\\F_y = 35sin(12^0)\\\\F_y = 7.28 \ N\)

Answer:

mass is the amount of matter in an object, whereas weight is the force exerted on an object by gravity

Answer:

h= 0.45 m

Explanation:

PE= 1/2 mv^2             KE= mgh

v= 3m/s

vf= 0 m/s

h=?

PE= 1/2(1kg)(3m/s)^2

PE= 4.5 J

4.5 J/ 1kg(9.8 m/s^2)

h=0.45 m

The height of the ball above the ground when it stops is 0.46 m.

The initial kinetic energy of the ball is equal to the final potential energy of the ball.

⇒ Formula:

⇒ Where:

⇒ make h the subject of the equation

From the question,

⇒ Given:

⇒ Substitute these values into equation 2

Hence, the height of the ball above the ground when it stops is 0.46 m.

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The materials that will respond to magnetic damping at a recycling centre to detect and separate certain materials are ferromagnetic conductors. So the answer is i.

Ferromagnetic conductors are materials that are strongly attracted to a magnet and can become magnetized themselves. These include iron, nickel, and cobalt. In terms of magnetic damping, these materials would respond very strongly to this method as they have a high magnetic susceptibility. This means that the magnetic damping system would be able to easily detect and separate these materials from other materials in the recycling centre. Nonferromagnetic conductors, on the other hand, are materials that conduct electricity but are not attracted to magnets. These include copper, aluminium, and gold. While they do not have a high magnetic susceptibility like ferromagnetic conductors, they can still be separated using magnetic damping. This is because the damping system can induce a small amount of magnetism in these materials, allowing them to be detected and separated from other materials.

Finally, insulators are materials that do not conduct electricity or heat. These include materials such as rubber, plastic, and glass. Insulators are not responsive to magnetic damping as they do not have any magnetic properties that can be induced by the damping system. As a result, they would not be separated using this method in a recycling centre.

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the answer is m= H/n - ac/n

The eccentricity of an orbit when both focal points are located at the sun is zero.

What is an orbit?

An orbit is the trajectory, or path, of an object that revolves around another object, the center of mass or a gravitational point. All planets orbit the sun, and the moon orbits the earth, for example, An elliptical orbit is the shape of many planetary orbits.

As a result, the eccentricity of the orbit is significant.

What is Eccentricity?

The degree of circularity of an orbit is referred to as its eccentricity. When the distance between the two foci is divided by the length of the major axis, eccentricity is calculated.

A perfectly circular orbit has an eccentricity of zero.

An ellipse with an eccentricity of 1 is a parabolic orbit. When eccentricity is greater than one, the orbit is hyperbolic.

The eccentricity of an orbit when both focal points are located at the sun:

Since there is only one focus, and the center of the sun is located there, the eccentricity of such an orbit is zero. Because there is only one focus, the distance between the two foci is also zero.

As a result, a planet's orbit with a sun-centered focus is always circular.

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That's true.

They're radio waves, at the frequency of 2.45 GHz (in all microwave appliances manufactured in the US).

Answer:

A

Explanation:

THE LIGHT SLOWS DOWN

When light from the Sun passes through any type of matter the light slows down.

The behavior of light from the Sun as it interacts with any matter depends on the matter and its properties.

Since it comes through a vacuum and enters our atmosphere which is a denser medium and has a definite refractive index, the light slows down.

This also happens when light falls on material such as glass, water, and other transparent and translucent media. When it emerges out of such medium to a rarer medium like air, it speeds up to its initial speed.

A portion of the sunlight is absorbed by almost all the matter present on earth that's why something heats up when exposed to sunlight. While a considerable portion of the sunlight is reflected by the matter.

But the question says what happens when it passes through any matter. The answer is:

It slows down while passing through the matter since any matter is optically denser than the vacuum.

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a. It would take 160 Joules of work to lift the fridge of wigs without a simple machine. b. It would take an effort force of 50 Newtons to lift the fridge of wigs.

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object is moved through a distance in the direction of the force.

a. The work required to lift the fridge of wigs without a machine can be calculated using the formula:

Work = Force x Distance

Here, the force required to lift the fridge without a machine is 80 Newtons and the distance to be lifted is 2 meters. Therefore, the work required is:

Work = 80 N x 2 m = 160 Joules

So, it would take 160 Joules of work to lift the fridge of wigs without a simple machine.

b. With a lever having a mechanical advantage of 4, the effort force required to lift the fridge can be found using the formula:

Effort Force = Load Force / Mechanical Advantage

Here, the load force is the weight of the fridge, which is not given in the problem. Assuming the weight of the fridge is 200 Newtons (which is just an assumption and not given), the load force would be:

Load Force = Weight of Fridge = 200 N

The mechanical advantage of the lever is given as 4. Therefore, the effort force required to lift the fridge would be:

Effort Force = Load Force / Mechanical Advantage = 200 N / 4 = 50 Newtons

So, assuming the weight of the fridge to be 200 N and using a lever with a mechanical advantage of 4, it would take an effort force of 50 Newtons to lift the fridge of wigs.

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Answer:

190 is the average velocity.

Explanation:

Just add them together

Answer: C

Explanation:

The kinetic energy of the wind turns the turbine which creates kinetic energy of it's own, this rotational kinetic energy can be called mechanical energy and is used to create electricity

According to Kryder's Law, magnetic disk storage density is rising exponentially.

A magnetic substance, such as iron oxide, is deposited on magnetic disks. Hard disks made of rigid metal or glass and removable diskettes made of flexible plastic are the two sorts. Magnetic disks are round, flat pieces of metal or plastic that have an iron oxide coating on both sides.

Magnetic discs come in four different varieties: basic, planning, ring, and countersunk. All of these exist in a wide range of sizes, but their fundamental feature—that the diameter is always bigger than the depth—remains the same.

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These graphs do not consistent with one another because one is graph of potential energy U(x)  vs distance(x)  and two is graph of force (F(x)) vs distance(x).

Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.

Now, if a force F(x) is applied on an object, that caused a displacement of the object a distance x. Then potential energy of the object is:

U(x) = ∫ F(x)dx.

Hence, U(x) ≠ F(x)

That's why, these graphs  do not consistent with one another.

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