You are given a piece of thread and a metre scale. How will you estimate the diameter of the piece of thread

the name of an interaction that would form between a polar and a nonpolar molecule is dipole-induced dipole interaction.

Polar molecules have a permanent dipole moment due to the unequal sharing of electrons between atoms in the molecule. Nonpolar molecules have no permanent dipole moment because the electrons are shared equally between atoms in the molecule.

The types of intermolecular forces (IMFs) that can form between polar and nonpolar molecules are dipole-induced dipole interactions and ion-induced dipole interactions.

In a dipole-induced dipole interaction, the electric field of a polar molecule induces a temporary dipole moment in a nonpolar molecule. This temporary dipole moment then interacts with the permanent dipole moment of the polar molecule, resulting in an attractive force between the two molecules.

In an ion-induced dipole interaction, an ion (either positive or negative) interacts with the electron cloud of a nonpolar molecule, inducing a temporary dipole moment in the molecule. This temporary dipole moment then interacts with the permanent dipole moment of a nearby polar molecule, resulting in an attractive force between the two molecules.

Therefore, the name of an interaction that would form between a polar and a nonpolar molecule is dipole-induced dipole interaction.

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B. 8.4A.The current flowing through the shunt is 8.4A

To find the current flowing through the shunt, we will use the given information about the shunt's rating and the voltage drop across it. The shunt is rated as 15A/50mV, meaning it can handle a maximum current of 15A when the voltage drop is 50mV.
First, let's calculate the proportion between the rated current and the rated voltage drop:
Rated current (I1) / Rated voltage drop (V1) = \frac{15A }{ 50mV}
Now, we have the actual voltage drop (V2) across the shunt, which is 28mV. To find the current flowing through the shunt (I2), we will maintain the same proportion:
\frac{I2 }{ V2} = \frac{15A }{ 50mV}
\frac{I2}{28mV }= \frac{15A }{ 50mV}
Next, we will cross-multiply and solve for I2:
I2 =\frac{ (15A * 28mV) }{ 50mV}
I2 =\frac{ 420AmV }{ 50mV}
I2 = 8.4A
Therefore, the current flowing through the shunt is 8.4A, which corresponds to option B in the given choices.

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The work required to stop the car is 23,756 J

The work required to stop a car is equal to the amount of energy that the car has due to its motion. This energy is called the kinetic energy of the car. The kinetic energy of a car is calculated as the product of the mass of the car and the square of its velocity.

kinetic energy = 1/2 * mass * velocity²

The mass of the car is 1,168 kg and the velocity of the car is 24 km/hr. We will first need to convert the velocity from km/hr to m/s. To do this, we will multiply the velocity by 5/18. So, the velocity of the car is 24 * 5/18 = 6.667 m/s.

We can now calculate the kinetic energy of the car as follows:

kinetic energy = 1/2 * 1,168 * 6.667² = 23,756 J

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Answer:

c

Explanation:

The amount of mass used up in holding a nucleus together the mass defect represent.

Thus, The term "mass defect" refers to the discrepancy between the actual atomic mass and the expected mass obtained by multiplying the mass of the protons and neutrons in the nucleus by a constant factor.

The anticipated mass obtained by combining the masses of the nucleons is less than the actual atomic mass. The binding energy that is produced when a nucleus forms accounts for this extra mass.

The mass defect is a result of some of the mass being converted to energy during the formation of a nucleus. The real mass of an atomic nucleus is therefore less than the mass of the constituent particles.

Thus,  The amount of mass used up in holding a nucleus together the mass defect represent.

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3rd class with RA of 20 and FA of 10 levers would be best to use to move a specific object if your only objective was speed of the object's movement.

Speed, which is a scalar quantity, is the "speed at which an object is moving." The rate at which an object travels a distance can be thought of as its speed. A fast-moving object travels at a high speed and completes a significant distance in a brief period of time.

Miles per hour (mph), kilometres per hour (km/h), and metres per second (m/s) are the three most popular speed units (mph). The distance an object covers in a given amount of time is its speed. Speed equals distance x time is the speed equation. The metre per second, abbreviated as m/s or ms-1, is the SI unit of speed.

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NOTE: The given question is incomplete on the portal. Here is the complete question.

QUESTION: Which of the following levers would be best to use to move a specific object if your only objective was speed of the object's movement?

A. 1st class with RA of 10 and FA of 20

B. 2nd class with RA of 10 and FA of 20

C. 3rd class with RA of 20 and FA of 10

D. each would be just as effective as the others

Answer:

Biconcave lens or Diverging lens.

Virtual Image

0.75cm on the same side as the object.

Explanation:

Biconcave lens. Biconcave lenses form all images at the same side as the object. Although a biconvex lens can exhibit the same phenomena, it only occurs when the object is in between the focal point and the optical center (object distance<focal length). From the given parameters, the object distance is 3cm and the which is obviously greater than the focal length.

So, we conclude that the lens used is a biconcave lens.

A concave lens (biconcave, plano-convex,) alway produces a virtual image.

Let u, v and f represent the object distance, image distance and focal length of the lens respectively.

In this case,

u = 3cm

v = ?

f = -1cm ( f is negative for diverging lenses)

1/f = (1/u) + (1/v)

-1 = (1/3) + (1/v)

v = -3/4cm = -0.75 cm

The negative sign means that it's a virtual image.

Answer:

Light is nor a matter because

It has no mass

It occupies no volume

We can't touch it.

Explanation:

Matter is any material that has mass and occupies volume.

Here are 25 things that don't:

Truth, Peace, Justice, Honesty, Beauty, Envy, Jealousy, Gluttony, Pride, Arrogance, Modesty, Humility, Bravery, Victory, Democracy, Sincerity, Secrecy, Pain, Pleasure, Mercy, Liberty, Equality, Fraternity, Freedom, and Virtue have no mass, and they don't occupy any space.  So none of them contains any matter.

The magnitude and direction of the third force, such that the object continues to move with a constant velocity is 91.2N due northwest.

Given first force has a magnitude of  (Fy) = 72N due north

second force has a magnitude of (Fx) = 56N due west

Let the third force be F3

By pythagoras theorem we say:  Fy^2 + Fx^2 = F3^2

F3 = √(72)^2 + (56)^2 = √8320 = 91.2N

For direction theta = tan-(Fy/Fx) = tan-(72/56) = 52deg

Hence the magnitude of third force is 91.2N and must be acting towards north west direction to move with a constant velocity.

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The electrostatic force each charge exerts on the other is  2.81N  .\(q_{1} =\) \(3\) × \(10^{-6} C\)\(\\q_2}\)  \(= - 1.5\) × \(10^{-6} C\)   They are separated by a distance \(r = 0.12m\)

Electrostatic force is \(F =\) \(\frac{kq_{1} q_{2} }{r^{2} }\)

\(F = 2.81N\)

The term "scalar" refers to a category of quantities that may be fully defined by a single magnitude. Quantities called vectors can be fully represented by their direction as well as their magnitude.

How do you define a vector's magnitude?

A vector's length is considered to be its magnitude. The letter "a" stands for the dynamic array magnitude. For further information about a vector's magnitude, go to its introduction. This article deduces formulas for vectors magnitude in considerations of their coordinates in three and two dimensions, respectively.

Magnitude is simply "distance or amount," according to the definition given in physics. It illustrates the either the absolute or relative size or velocity direction for an item.

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Answer:

Ver explicación

Explanation:

Según los principios de Arquímedes, el empuje hacia arriba de un objeto sumergido en un fluido es igual al peso del fluido desplazado.

Por eso

Empuje hacia arriba = volumen del objeto * densidad del fluido * aceleración debida a la gravedad

Empuje hacia arriba = 2 * 10 ^ -6 / 2 * 1 * 10 ^ 3 * 10

Empuje hacia arriba = 0.01 N

Desde;

Empuje hacia arriba = peso del fluido desplazado

peso del fluido desplazado = 0.01 N

Masa de fluido desplazado = 0.01 N / 10 = 1 * 10 ^ -3 Kg o 1 g

The density of the neutron star is  ρ = \(7.733\)×\(10^{14}\) \(g/cm^{3}\).

The volume of the neutron star is

V=(\(4\pi /3\))×\(R^{3}\)

V= \(25.72^{17} cm^{3}\)

Now the density of the neutron star is

ρ = M/V

ρ =  \(7.733\)×\(10^{14}\)g/\(cm^{3}\)

The collapsing core of a large supergiant star with a total mass of between 10 and 25 solar masses—possibly even more if the star was very metal-rich—is what we refer to as a neutron star. Neutron stars are the tiniest and densest class of stellar objects currently known, with the exception of black holes and other hypothetical phenomena.

Although the galaxy may contain hundreds of millions of ancient neutron stars, only about 1,000 pulsars are known to exist. Although the enormous pressures found at neutron star cores may be similar to those at the moment of the big bang, conditions like this cannot be replicated on Earth.

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Answer:

In today's world pollution is very high so alternative energy such as solar energy help us to make pollution free world. So it is necessary to use alternative energy.

Answer:

60 km per hour

Explanation:

if you drive for 30 min and go 30km then if you drive for 60 min(1hr) then you would have driven 60km.

Answer:

60

Explanation:

hope this helps

Answer:

The methodology employed by Galileo contributed to the development of Physics by find moons of Jupiter. (I think)

sorry if it's wrong

Answer:

yes

Explanation:

The option that summarizes the production of energy at Hoover Dam is A. Mechanical Energy of the flowing water is transformed into electrical energy by rotating coils in a magnetic field, producing an alternating current.

The Hoover Dam is a hydroelectric dam, which means it generates electricity by harnessing the mechanical energy of flowing water. The dam has a system of turbines that are turned by the flow of water, which then rotates coils of wire in a magnetic field.

This interaction produces an alternating current (AC) electrical signal, which is then transformed into usable electrical energy that can be distributed to power homes and businesses.

In this way, Hoover Dam and other hydroelectric dams generate electricity without producing any greenhouse gas emissions, making them an important source of clean and renewable energy.

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Options for this question are:

Answer:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator

The theory of plate tectonics explains the movement of the Earth's lithosphere (the rigid outer shell) that consists of several large tectonic plates. The movement of these plates is believed to be driven by convection currents in the Earth's mantle, which is the layer beneath the lithosphere.

Scientists have developed two main hypotheses to explain the driving forces behind plate tectonics: ridge push and slab pull.

Ridge push is the hypothesis that the force driving plate movement comes from the elevated position of the mid-ocean ridges, where new crust is formed by volcanic activity. As new crust is created at the ridge, it pushes the older crust away from the ridge and towards the subduction zones, where it is recycled back into the mantle. This process creates a kind of conveyor belt that drives the plates apart from each other.

Slab pull is the hypothesis that the force driving plate movement comes from the sinking of the oceanic lithosphere at subduction zones. As an oceanic plate is subducted beneath another plate, it pulls the rest of the plate along with it, causing the entire plate to move. This process creates tension in the lithosphere, which is released through the movement of the plates.

While both hypotheses have their merits, most scientists believe that slab pull is the primary driving force behind plate movement. The force required to subduct a cold, dense oceanic plate beneath another plate is thought to be sufficient to overcome the resistance of the lithosphere and move the plates. Additionally, evidence suggests that subduction zones are where the majority of plate motion occurs.

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Yes, the angle at which the triple beam of light hits the triangle can have an impact on the behaviour of the light.

In the case of a triangle, if the light hits the triangle at different angles, it will be reflected or refracted differently depending on the angle of incidence at each point of contact. This can result in variations in the path of the light as it interacts with different parts of the triangle.

Additionally, the angle at which the light hits the triangle can affect the perception of the triangle's shape and size when observed from different viewing angles. The angle of incidence and the resulting angle of reflection or refraction can impact the apparent position and orientation of the triangle as seen by an observer.

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The product of the ion concentrations is less than Ksp, hence no precipitate will form.

When aqueous solutions of BaCl₂ and K₂SO₄ are mixed, it forms a white precipitate. The ionic equation for the precipitation reaction is: Ba²⁺ (aq) + SO₄²⁻(aq) → BaSO₄ (s). When a common ion such as K+ is added, the solubility of BaSO4 decreases due to the common-ion effect.

The ion concentration of K₂SO₄ can be calculated by using the formula: 0.0080 mol/L * 0.65 L = 0.0052 mol. The ion concentration of BaCl₂ can be calculated by using the formula: 0.0040 mol/L * 0.25 L = 0.0010 mol. The product of the ion concentrations is 0.0052 * 0.0010 = 5.2 x 10^-6 which is less than Ksp of BaSO₄ (1.5 x 10^-9) at 298 K. Hence, no precipitate will form.

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To solve this problem, we need to consider the forces acting on the wallet as it falls on the windshield of the van. The only forces acting on the wallet are the gravitational force pulling it downward and the normal force of the windshield pushing it upward.

We know that the normal force is perpendicular to the surface of the windshield, so it makes an angle of 120o relative to the horizontal. To keep the wallet in place relative to the windshield, the acceleration of the van needs to be equal and opposite to the acceleration due to gravity acting on the wallet.

Thus, we can set up the following equation:

a = g * sin(120o)

where a is the acceleration of the van needed to keep the wallet in place relative to the windshield, g is the acceleration due to gravity (9.8 m/s2), and sin(120o) is the sine of the angle between the normal force and the vertical direction.

Assuming that the van is driving on a flat road and at a constant velocity, we can neglect any additional forces acting on the wallet and the van. We can also assume that the windshield is completely flat and that the wallet is small enough to be treated as a point mass.

These assumptions are reasonable because we are only interested in finding the acceleration needed to keep the wallet in place relative to the windshield, and the other forces and factors are negligible for this purpose. The assumption that the windshield is completely flat is reasonable because any curvature would only affect the normal force acting on the wallet, which is already accounted for in the 120o angle. The assumption that the wallet is small enough to be treated as a point mass is reasonable because the size and shape of the wallet should not significantly affect its motion on the windshield.

Using the equation above, we can calculate that the acceleration needed by the van is approximately 8.49 m/s2.

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Answer:

The answer is Low earth orbit

The internal energy change of the system is -76.88 kJ.

From the first law of  thermodynamics, energy can neither be created nor destroyed but is converted from one form to another.

Given that;

ΔE = q + w

E = internal energy

q = heat gained/lost

w = work done by or on the system

Since the system was heated, it absorbed heat hence q is positive. The gas expanded so it did work and w is negative, thus, creating a differece in internal energy.

To calculate the internal energy,

ΔE =  115 J - 77 × 10^3 J

ΔE = - 76,885 J

ΔE = -76.885kJ

Therefore the change in the internal energy of an inflated balloon is -76.885 KJ.

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The geological change happens here is the formation of a land by the deposits by river stream. This process is called accretion.

If you kept a close eye on the bank of a river or the shoreline of a lake or ocean for an extended period of time, you'd notice that the water was depositing soil on the shoreline or bank. Accumulation is the natural, slow, and almost imperceptible deposit of soil by water.

The owner of the bank or shoreline upon which the accretion occurs is generally recognized to own the land formed by accretion. However, keep in mind that accretion does not destroy an existing right of way, which is the legal right to travel along another person's property.

Here, the  ranch deposits sediment along the banks of the river and adds half an acre of land to the ranch by the rive stream . Hence, it is an example of accretion. Thus, option A is correct.

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The main answer to your question is that the brightness of bulb B is the same as the brightness of bulb A since they both have the same resistance.

To give an explanation, when lightbulbs are connected in series, the same current flows through each bulb.

Since they have the same resistance, they will both use the same amount of energy and emit the same amount of light.

In summary, the brightness of bulb B is not greater or smaller than the brightness of bulb A as they are equal due to the same resistance and same current flowing through them in series.

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The instantaneous velocity of the ball is when $t=2$ is 32 ft/s so the average velocity: 32 ft/s.

The given function is $y=60t-16t^2$. We need to find the average velocity of the ball for the time period beginning when $t=2$ seconds and lasting. The average velocity is calculated by dividing the distance travelled by the time taken. The average velocity for the time period beginning when $t=2$ seconds and lasting 0.5 seconds is calculated as follows:

Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Here, $y_2$ is the value of the function when $t=2.5$ and $y_1$ is the value of the function when $t=2$. Therefore, $y_2=60(2.5)-16(2.5)^2=45$ and $y_1=60(2)-16(2)^2=32$.The time taken is $0.5$ seconds. Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Average velocity = $[\frac{45-32}{0.5}]$Average velocity = $[\frac{13}{0.5}]$Average velocity = $26$ ft/sNow, for the time period beginning when $t=2$ seconds and lasting(ii) 0.1 seconds. Here, $y_2$ is the value of the function when $t=2.1$ and $y_1$ is the value of the function when $t=2$. Therefore, $y_2=60(2.1)-16(2.1)^2=31.84$ and $y_1=60(2)-16(2)^2=32$.The time taken is $0.1$ seconds. Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Average velocity = $[\frac{31.84-32}{0.1}]$Average velocity = $[-1.6]$ ft/s(iii) 0.01 seconds. Here, $y_2$ is the value of the function when $t=2.01$ and $y_1$ is the value of the function when $t=2$. Therefore, $y_2=60(2.01)-16(2.01)^2=31.9364$ and $y_1=60(2)-16(2)^2=32$.The time taken is $0.01$ seconds. Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Average velocity = $[\frac{31.9364-32}{0.01}]$Average velocity = $[-6.36]$ ft/s

Finally based on the above results, we can guess that the instantaneous velocity of the ball is when $t=2$ is 32 ft/s. hence, Average velocity: 32 ft/s.

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Answer:

A = 3cm or 0.03m

Explanation:

The amplitude of the transverse wave modeled in the figure is determined as 3 cm.

The amplitude of a wave is the maximum displacement of the wave. This is the maximum vertical position of the wave from the zero origin or resting position.

From the given image of the transverse wave, the maximum vertical position of the wave from the resting position is 3 cm.

Thus, the amplitude of the transverse wave modeled in the figure is determined as 3 cm.

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The time taken to reach one crest is 0.5731 s. Then the time period of the wave is 1.146 s. The frequency is the inverse of the period that is 0.87 Hz.

The time period of a wave is the time required to complete one wave cycle. For a transverse wave the period of the wave is the time required to reach from one crest to the next crest of the wave.

Given that, time to reach one crest = 0.5731 s.

then the time for to the next crest from the equilibrium position is :

T = 0.5731 s× 2 = 1.146 s.

Frequency of a wave is the number of wave cycles per second. It is the inverse of time period of the wave.

Hence, frequency = 1/T

ν = 1/ 1.146 s = 0.87 Hz.

Therefore, the period of the wave is 1.14 s and frequency is 0.87 Hz.

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Answer:

C

Explanation:

( I dun know how to explain it ‍ but i do know that the answer is C. Saw it in a past paper.)

Answer:

High run off, low evaporation

Explanation:

High run off and low evaporation causes flood because if evaporation is low, there won't be changing of liquid water to gas or vapor meaning water will be in abundance and if there is much water in abundance it can lead to flooding. High run off can result in flooding if rainfall water overwhelm the capacity of the drainage system i.e the water is more than what the drainage system can carry, it can result in flooding.

Answer:

high runoff, low evaporation, low precipitation

Explanation:

High run off and low evaporation causes flood because if evaporation is low, there won't be changing of liquid water to gas or vapor meaning water will be in abundance and if there is much water in abundance it can lead to flooding. High run off can result in flooding if rainfall water overwhelm the capacity of the drainage system i.e the water is more than what the drainage system can carry, it can result in flooding.