What does it mean if an object is electrically uncharged?

The object has been placed in water.
It has gained positive charges.
It has gained negative charges.
There has been no transfer of charge.

Answer:

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

Explanation:

El movimiento rectilíneo uniforme (MRU) es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante.

La distancia recorrida,  x , por un móvil que tiene un MRU con un velocidad  v  durante el intervalo de tiempo  t  es:

x= x0 + v*t

donde x0 es la posición inicial.

En este caso:

Reemplazando:

x= 22 m + 5 m/s* 30 s

Resolviendo:

x= 22 m + 150 m

x= 172 m

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

If the silver copper cell is run long enough for a change of 1.08g at the silver electrode the change in mass at the copper electrode will be a 0.32g gain.

The amount of matter that makes up every object or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a chair, your bed, a football, a glass, and even air. The mass of a thing determines whether it is light or heavy. We will study what mass is, how to calculate it, and instances of it in this session while also learning intriguing facts about it.

The most fundamental characteristic of matter is its mass, which is also one of the fundamental quantities.

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According to Wien's displacement, the peak wavelength is 2.92 x 10¯⁷ m.

We need to know about Wien's displacement to solve this problem. Wien's displacement law states that the temperature and the wavelength of the blackbody radiation are inversely proportional. It can be determined as

λmax= b/T

where λmax is the peak of wavelength, b is the Wien's displacement constant having a value of (2.9 x 10¯³ mK) and T is the Absolute Temperature in Kelvin.

From the question above, the given parameter is

T = 9,940 K

By substituting the given parameters, we can calculate the peak wavelength

λmax= b/T

λmax= 2.9 x 10¯³ / 9940

λmax = 2.92 x 10¯⁷ m

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Many students of physics do not believe in centripetal ("inwards") forces. Even after completion of a thorough physics course, such students will still incorrectly believe that an object moving in a circle experiences an outward force. Perhaps the reason for adhering to this misconception stems from their experiences with riding as a passenger in automobiles and amusement park rides.

Imagine that you are a passenger in a car which is making a right-hand turn. As the car begins to take the turn to the right, you often feel as though you are sliding to the left. The car is turning to the right due to the inward force, yet you feel as though you are being forced leftward or outward. In actuality, the car is beginning its turning motion (to the right) while you continue in a straight line path. This motion can be better understood by examining the animation below.

Observe in the animation that the passenger (in blue) continues in a straight-line motion for a short period of time after the car begins to make its turn. In fact, the passenger follows a straight-line path until striking the shoulder of the driver (in red). Once striking the driver, a force is applied to the passenger to force the passenger to the right and thus complete the turn.

An inward net force is required to make a turn in a circle. This inward net force requirement is known as a centripetal force requirement. In the absence of any net force, an object in motion (such as the passenger) continues in motion in a straight line at constant speed. This is Newton's first law of motion. While the car begins to make the turn, the passenger and the seat begin to edge rightward. In a sense, the car is beginning to slide out from under the passenger. Once striking the driver, the passenger can now turn with the car and experience some circle-like motion. There is never any outward force exerted upon the passenger. The passenger is either moving straight ahead in the absence of a force or moving along a circular path in the presence of an inward-directed force.

Answer:newtons second law

Explanation:

To get something to accelerate you have to apply a pull force . if the mass increase a grater pull is required

The law that explains the fact that a heavier truck takes a longer time to stop is Newton's law of inertia.

According to Newtons first law of motion also called the law of inertia, a body will continue in a state of rest or uniform motion unless it is acted upon by an external, unbalanced force.

This law explains the reluctance of heavier objects to move or stop. The law that explains the fact that a heavier truck takes a longer time to stop is Newton's law of inertia.

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Answer:

So, Mercury is the closest planet to the Sun.

Explanation:

Answer:

The largest mass is 170.7 Kg.

Explanation:

Given that,

Tension = 1500 N

We need to calculate the tension in the rope

Using balance equation

\(T_{1}\cos\theta=T_{2}\cos\theta\)

Put the value into the formula

\(T_{1}\cos30=T_{2}\cos45\)

\(T_{1}\dfrac{\sqrt{3}}{2}=\dfrac{T_{2}}{\sqrt{2}}\)

\(T_{1}=\dfrac{\sqrt{2}}{\sqrt{3}}\times T_{2}\)

If \(T_{2}=1500\ N\)

\(T_{1}=\dfrac{\sqrt{2}}{\sqrt{3}}\times1500\)

\(T_{1}=1224.74\ N\)

We need to calculate the largest mass

Using balance equation

\(mg=T_{1}\sin30+T_{2}\sin45\)

\(mg=1224.74\times\dfrac{1}{2}+1500\times\dfrac{1}{\sqrt{2}}\)

\(mg=1673.03\ N\)

\(m=\dfrac{1673.03}{9.8}\)

\(m=170.7\ Kg\)

Hence, The largest mass is 170.7 Kg.

Hi! An atom can be described as chemically inert if its outermost electron shell contains a full set of electrons.

In most cases, this means having eight electrons, which is known as the octet rule. Chemically inert atoms are less likely to participate in chemical reactions, as they have a stable electron configuration.

Elements with full outermost shells are called noble gases, such as helium, neon, and argon. These elements exhibit low reactivity and minimal chemical interactions due to their stable electron configurations.

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Answer:

A

Explanation:

I just did it :)

Answer:

It is A

Explanation:

I did it and got a 100

The experiment involves comparing the temperatures of two thermometers placed in different atmospheric compositions and exposed to radiant energy. The goal is to track the amount of radiant energy absorbed by each atmosphere over a period of 30 minutes.

Part B of the experiment involves performing the actual experiment by following the given directions.:

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Answer:

10.2 kg

Explanation:

Assuming the object is on Earth:

w = mg

m = w / g = 100 / 9.81 = 10.2kg

The labelled parts on the element of the periodic table depicts the atomic number and atomic mass.

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The definition of the physical quantity known as torque takes into account the strength, direction, and point of application of the force answer is 70.7066

The rotating equivalent of a force is a torque. It is a way to gauge how well a force may modify or speed up rotation (changing the angular velocity over a period of time). The definition of the torque's magnitude in equation form is

τ = r F sin θ

  =2.5*44sin 40

  =70.7066

where is the torque, r is the distance between the pivot point and the force application, F is the force's magnitude, and is the angle between F and the vector leading from the force application point to the pivot point. The definition of the perpendicular lever arm r The absence of any net external torque on a system is the second prerequisite for equilibrium.

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The position of the image by a concave spherical mirror is 24.67 cm.

To calculate the position of the image formed by a concave spherical mirror, we can use the mirror formula:

1/f = 1/d_o + 1/d_i,

where f is the focal length of the mirror, d_o is the object distance (distance of the object from the mirror), and d_i is the image distance (distance of the image from the mirror). The sign convention is such that distances to the left of the mirror are considered negative.

Given:

Object height (h_o) = 0.760 cm

Object distance (d_o) = -17.5 cm (since it is to the left of the mirror)

Radius of curvature (R) = -20.5 cm (negative since it's a concave mirror)

First, we need to calculate the focal length of the mirror using the formula:

f = R/2

f = -20.5 cm / 2 = -10.25 cm

Now, let's substitute the values into the mirror formula:

1/-10.25 = 1/-17.5 + 1/d_i

Solving for d_i:

1/d_i = 1/-10.25 - 1/-17.5

1/d_i = (-17.5 + 10.25) / (-10.25 * -17.5)

1/d_i = 7.25 / 179.125

d_i = 179.125 / 7.25

d_i ≈ 24.67 cm

The position of the image is approximately 24.67 cm to the right of the vertex of the concave spherical mirror.

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V = 3 x 2 + 5 gives the potential of the electric field created by a point charge at any point (x, y, z), where x and y are measured in meters and V is measured in volts. At (2, 1, 0), the electric field has a strength of +12 Vm-1. Here the correct answer is option C.

The electric field E at any point in space is given by the negative gradient of the potential V at that point. That is,

E = -∇V

where ∇ is the gradient operator.

In this case, the potential is given by V = 3x^2 + 5, so the gradient of V is

∇V = ( ∂V/∂x, ∂V/∂y, ∂V/∂z )

= ( 6x, 0, 0 )

Evaluating this at the point (-2, 1, 0) gives

E = (6x, 0, 0)

= (-12, 0, 0)

The magnitude of the electric field intensity is given by

|E| = √(Ex^2 + Ey^2 + Ez^2)

= √((-12)^2 + 0^2 + 0^2)

= 12 Vm^-1

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A medium is a substance that enables the transfer of energy from one location to another through waves or vibrations. It allows the oscillation of particles in the medium, which affects the speed and direction of the wave.

A substance that makes possible the transfer of energy from one location to another through waves is called a medium. A medium is a physical material or substance that can transmit waves or vibrations. Examples of media include air, water, metal, and even vacuum (for electromagnetic waves). When a wave travels through a medium, energy is transferred from one location to another through the oscillation of the particles in the medium. For example, when a sound wave travels through air, the air particles vibrate back and forth, transferring the sound energy from the source of the sound to our ears. The properties of the medium can affect the speed and the direction of the wave. For instance, sound waves travel faster through denser mediums, like water or metal, than through less dense mediums, like air. Similarly, the direction of the wave can change when it encounters a medium with a different density, as in the case of refraction.

In summary, a medium is a substance that can transmit waves or vibrations, allowing the transfer of energy from one location to another through the oscillation of the particles in the medium.

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Answer:

B. 44.1

Explanation:

We can use the equation y=1/2gt^2 to find the distance in the vertical direction, where y= distance in the vertical direction, g=acceleration due to gravity, and t=time

we only know acceleration due to gravity(9.8m/s^2),

plug in known variables,

y=1/2*9.8*t^2

we still need to plug in the time variable.

In order to do that, we an use the s=d/t equation and re arrange that formula to get: t=d/s, where t=time, d=distance, and s=speed.

plug in known variables,

t=60/20

t=3

now that we know the time, we can plug that into our original equation

y=1/2*9.8*3^2

simplify,

y=4.9*3^2

y=4.9*9

y=44.1m

Thus, B is your answer

Answer:

10 joules

Explanation:

formula for kinetic energy= 1/2mv²

mass (m) given = 5kg

velocity (v) given = 2m/s

therefore, by inputting them into the formula

= 1/2(5)(2)²

= 1/2 x 5 x 2²

= 1/2 x 5 x 4

= 1/2 x 20

= 10J

By applying the law of syllogism, we were able to form a new statement based on the given conditional statements.

The law of syllogism is a logical rule that allows us to make a conclusion based on two conditional statements. In this case, we have the statement "if the dog jumps in the lake, then it gets wet" (r s). To apply the law of syllogism, we need another conditional statement that connects the conclusion of the first statement to a new conclusion.
Let's say we have another statement: "if it is raining, then the ground is wet" (q r). Using the law of syllogism, we can combine the two statements to form a new conclusion: "if the dog jumps in the lake, then the ground is wet" (r q).
To summarize:
- Statement 1: if the dog jumps in the lake, then it gets wet (r s)
- Statement 2: if it is raining, then the ground is wet (q r)
- Conclusion: if the dog jumps in the lake, then the ground is wet (r q)
By applying the law of syllogism, we were able to form a new statement based on the given conditional statements.

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The sun appears approximately 45.19º above the horizon for the underwater scuba diver.

To determine how far the sun is above the horizon for an underwater scuba diver, we can use Snell's law, which relates the angle of incidence and the angle of refraction when light passes through different mediums.

Snell's law states:

n1 * sin(θ1) = n2 * sin(θ2)

where n1 and n2 are the refractive indices of the two mediums, and θ1 and θ2 are the angles of incidence and refraction, respectively.

In this case, the light is passing from air (n1 ≈ 1.00) to water (n2 = 1.3). The angle of incidence (θ1) is the angle between the vertical and the line connecting the observer's eye to the sun, which is given as 45º.

To find the angle of refraction (θ2), we can rearrange Snell's law:

sin(θ2) = (n1 / n2) * sin(θ1)

Substituting the values, we have:

sin(θ2) = (1.00 / 1.3) * sin(45º)

Calculating this expression, we find:

sin(θ2) ≈ 0.724

To determine the angle θ2, we take the inverse sine (arcsin) of 0.724:

θ2 ≈ arcsin(0.724)

Using a calculator, we find:

θ2 ≈ 45.19º

The angle θ2 represents the deviation of the light ray from the vertical due to refraction. Therefore, the sun appears approximately 45.19º above the horizon for the underwater scuba diver.

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Explanation:

Friction can't affect mass of a substance(considering for a substance whose mass doesn't change with time),rather it is the mass of an object which can affect friction variously. Let's take some example to understand the situation. So,higher the mass of the object,higher will be the frictional force.

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

Answer:

D. Frequency

Explanation:

The energy of an  electromagnetic wave is proportional to frequency, mathematically it is expressed as;

E ∝ f

E = hf

where;

h is Planck's constant = 6.626 x 10⁻³⁴ Js

The equation above can also be expanded to;

\(E = hf = h \frac{c}{\lambda}\)

where;

c is speed of light = 3 x 10⁸ m/s

λ is the wavelength of the electromagnetic wave

Since the speed of light is constant, we can conclude that the energy of the electromagnetic wave is directly proportional to its frequency and inversely proportional to its wavelength.

Therefore, the correct option for direct proportionality is FREQUENCY

The primary reason the moon lacks an atmosphere is due to the fact that it does not have sufficient gravity to hold onto the gas molecules that make up an atmosphere.

In order to keep an atmosphere around a planet, it is required that the planet have a sufficient amount of gravity to hold the gases in place. A planet's gravity depends on its mass. The more massive an object is, the stronger its gravitational force will be.

As a result, the gravity of a planet, which is determined by its mass and size, is what allows it to hold onto its atmosphere. The moon, on the other hand, has a much lower mass than Earth, so it has a weaker gravitational force. As a result, the moon cannot hold on to gas molecules, such as oxygen and nitrogen, which can simply drift away into space.

So, the main reason why the moon lacks an atmosphere is that it doesn't have sufficient gravity to hold onto the gas molecules that make up an atmosphere.

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Answer:

The emf of a cell is the sum of the electric potential differences (PDs) produced by a separation of charges (electrons or ions) that can occur at each phase boundary (or interface) in the cell. The magnitude of each PD depends on the chemical nature of the two contacting phases.

Explanation:

pls mark brainliest

Answer:

C: Maximum potential energy is at point R

Explanation:

Just did test

Given : Airplane is 0.68 kilometers long

We know that :

⊕   1 km = 1000 meters

⊕   1 m = 1000 millimeters

⇒   1 km = (1000 × 1000) millimeters

⇒   0.68 km = (0.68 × 1000 × 1000) millimeters

⇒   0.68 km = 680,000 millimeters

Answer: Airplane is 680,000 millimeters long

If an airplane is 0.68 Kilometers long, the length of the airplane in millimeters would be 680000 Millimeters, therefore the correct answer is option D.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind.

As given in the problem, If an airplane is 0.68 Kilometers long, then we have to find out the length of the airplane in millimeters,

1 kilometers = 1000 meters

1 meter = 100 centimeters

1 centimeters = 10 millieters

As given the length of the plane is 0.68 Kilometers.

0.68 kilometers = 680 meters

0.68 kilometers = 680×100 centimeters

0.68 kilometers = 680×100×10  millimeters

                           = 680,000 millimeters

Thus, the correct answer is option C.

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The amount of energy consumed in the form of work by the ideal Carnot refrigerator to freeze 2 kg of water at 0°C is approximately 6.05 x 10\(^4 J.\) So the answer is A) 6.1 x 10\(^4 J.\) (rounded to two significant figures).

The Carnot cycle consists of two isothermal and two adiabatic processes. For a refrigerator, the heat is transferred from a low-temperature reservoir (the freezer) to a high-temperature reservoir (the room), and work must be done on the system to accomplish this. The Carnot cycle tells us that the work done by the refrigerator is:

\(W = Q_L (1 - T_H/T_L)\)

where Q_L is the amount of heat transferred from the low-temperature reservoir, T_H is the temperature of the high-temperature reservoir (the room, in this case), and T_L is the temperature of the low-temperature reservoir (the freezer). We can solve for Q_L and then use the heat of transformation for water to find the work done to freeze 2 kg of water.

The temperature of the freezer is 0°C = 273 K. The temperature of the room is 25°C = 298 K. Therefore, we have:

Q_L = W/(1 - T_H/T_L)

= W/(1 - 298 K/273 K)

= W/0.0908

We know that the heat of transformation for water is 333 kJ/kg, so the heat required to freeze 2 kg of water is:

Q_L = (2 kg) * (333 kJ/kg)

= 666 kJ

Substituting this into the equation above, we get:

666 kJ = W/0.0908

Solving for W, we get:

W = 666 kJ * 0.0908

= 60.5 kJ

= 6.05 x 10\(^4 J\)

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From the given options let's select the example which shows a conceptual model.

A conceptual model can be said to be a model which shows an abstract representation of any concept which can be visualized or imagined than other models.

It is a model which the designers want users to understand.

From the list, the best option which is an example of a conceptual model is a mental image of gas molecules as tiny balls.

Let's say, for example, you imagine or have a mental picture of gas molecules using your imagination, it helps to understand how a vacuum system works and you can easily solve the problem if something goes wrong.

Therefore, the example of a conceptual model is:

A mental image of gas molecules as tiny balls.

• ANSWER:

A. mental image of gas molecules as tiny balls

Answer:

to the left the first answer can be "Consumer" and under it can go "plant"

to the right the first answer on the top can be "Carnivore" under it can go "Herbivore" and under it can go "Producer"

I just had this question and its right

Answer:

to the left the first answer can be "Consumer" and under it can go "plant"

to the right the first answer on the top can be "Carnivore" under it can go "Herbivore" and under it can go "Producer"

I just had this question and its right

Explanation

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