Are all resistance ohmic in nature?

Answer:

O ice

Explanation:

Albedo refers to the proportion of the incident light that is reflected by a surface to the amount of incoming light.

Here, only ice will reflect even some amount of light. Pavement and dirt do not reflect at all, meanwhile, where glass reflects slightly.

Answer:

The answer is "They involve changes in energy".

Explanation:

Energy change is quite important in chemicals because nearly all reactions involve activation energy. They will learn and learn how to utilize different types of energy shifts in the steam cycle. A conversation about what drives chemical processes contributes to entropy and natural energy principles. It may shift from the shape of form. For example, chemicals might change to heat. Laser light can turn substances into power. Its energy can be changed into different kinds, but not wasted or produced.

Answer:

D

Explanation:

change in energy please give brainliest (edge 2021)

The Young's Modulus of the wire of length 50 cm is 4.0×10⁵ N/m.

Young's modulus is a measure of the ability of a material to withstand changes in length when under lengthwise tension or compression.

To calculate the young's modulus of the wire, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the Young's Modulus is 4.0×10⁵ N/m.

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Correct answer is blue-purple.

Let's discuss it further below.

To find the wavelength most strongly reflected at the center of the outer surface when a soap bubble with a thickness of 120 nm is illuminated by white light, you should use the formula for constructive interference. Assuming the refractive index n = 1.34, follow these steps:

1. Calculate the optical path difference: The path difference is twice the thickness of the soap film multiplied by the refractive index (n). In this case, it is 2 × 120 nm × 1.34 = 321.6 nm.

2. Determine the wavelength of constructive interference: For constructive interference, the optical path difference must be equal to an integer multiple of the wavelength. Since the optical path difference is 321.6 nm, you can approximate the reflected wavelength to be around 321.6 nm.

3. Identify the color: A wavelength of approximately 321.6 nm corresponds to the blue-purple range of the visible light spectrum.

So, when a soap bubble with a thickness of 120 nm and refractive index of 1.34 is illuminated normally by white light, the wavelength most strongly reflected at the center of the outer surface is blue-purple.

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Answer:

work done is directly proportional to the net force acting on the object.

Explanation:

work done = Force × displacement

Answer: F=kq1q2/r2

"F" is the resulting force between the two charges. The distance between the two charges is "r." The "r" actually stands for "radius of separation" but you just need to know it is a distance. The "q1" and "q2" are values for the amount of charge in each of the particles.

Explanation:

The mathematical equation for the electric force between two charges will be ,\(\rm F = \frac{K q_1q_2}{r^2}\). It is a type of attractive force.

The electric force between the two charges is directly proportional to the product of the charge and inversely proportional to the square of the distance between them.

The electric force is found as;

\(\rm F = \frac{K q_1q_2}{r^2}\)

q₁ is the magnitude of charge 1

q₂ is the magnitude of charge 2

k is the proportionality constant

r is the separated distance

F is the electric force

Hence, the mathematical equation for the electric force between two charges will be ,\(\rm F = \frac{K q_1q_2}{r^2}\)

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The unit of atomic unit is simply called "atomic unit" and is denoted as "a.u."

It is a system of natural units used in atomic physics and other fields to simplify calculations by setting fundamental constants such as the electron charge, mass, and Planck's constant to a value of 1. In the atomic unit system, the length unit is the Bohr radius, the energy unit is the Hartree energy, and the time unit is the atomic unit of time. Other derived units such as force, momentum, and electric field are expressed in terms of these fundamental units. The use of atomic units allows for more convenient calculations, as it simplifies the equations involved and eliminates the need to carry around many constants in calculations. It is widely used in theoretical chemistry, quantum mechanics, and other fields related to atomic and molecular physics.

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Surface tension increases as the temperature of the liquid rises is False.

Surface tension generally decreases as the temperature of the liquid rises. As temperature increases, the average kinetic energy of the molecules also increases, leading to greater movement and disruption of the intermolecular forces that create surface tension.

This results in a decrease in surface tension with increasing temperature.

Hence, Surface tension increases as the temperature of the liquid rises is False.

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Answer:

Aristotle was blind, therefore could not see change in positions. Aristotle could see no detectable change in the positions of the stars, thought Earth was immovable.

Explanation:

Jupiter rotates the fastest in the Solar System, finishing one full round on its axis in little under ten hours, 9 hours, 55 minutes, and 30 seconds.

Thus, there are 10,475.8 Jovian solar days in a single Jovian year. The two biggest planets in our Solar System have a 5:2 orbital resonance because their orbital periods are two-fifths that of Saturn.

A planet spins on its axis when it rotates. This results in day and night on Earth. Jupiter and the majority of planets revolve in the opposite direction.

Jupiter is once again the top planet in terms of rotation, having the quickest spin. Jupiter's revolution takes little under ten Earth hours to complete.

Jupiter rotates at a different pace throughout since it is mostly formed of gases. Jupiter rotates in a period of nine hours and fifty minutes, just above and below its equator.

For locations further from the equator, the speed decreases by around 5 minutes. 9.9 hours per day are the global average.

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Answer:

serial in which container is filled

Solid -base of container

Liquid- above solid

Gas- above liquid

Explanation:

If any mixture of  matter in different state (that solid , liquid or gas )are kept in any container, then substance with higher density will be settled at lowest surface first and similarly the substance with lowest density will be at upper part of container.

In the given container we have to keep solid, liquid and gas

based on this

solid will be at surface of container

above sold will be liquid

above liquid will be presence of Gas

serial in which container is filled

Solid -base of container

Liquid- above solid

Gas- above liquid

The values of charge for q₁ and q₂ are 5.715 × 10⁻⁸ C and -5.715 × 10⁻⁸ C, respectively.

Electric charge is the physical property of any matter which causes it to experience a force when it is placed in an electromagnetic field.

The acceleration is upwards. Therefore, the charge will be accelerated upwards and it is attracted by charge q₁ and repelled by q₂. Therefore, the q₁, is positive charge and q₂, is negative charge.

The net force for the following case will be,

Fq₁Q + Fq₂Q = 0

kq₁ Q/ r² = - kq₂ Q/ r²

q₁ = -q₂

The net force is,

Fnet = ma

F net = (5.50 × 10⁻³ kg) (304 m/s²)

Fnet = 1.672 N

The triangle is an isosceles triangle and the value of the angle is,

cos θ = -2.25 cm/ 3cm

θ = cos⁻¹(-2.25 cm/ 3cm)

θ = 41.4°

The force equation is,

F net = kq₁ Q/ r² cos θ + kq₂Q/ r²cos θ

ma = kq₁ Q/ r² cos θ + kq₂Q/ r²cos θ

1.672 N = 2 (9×10⁹) (1.95×10⁻⁶ c) / (3×10² m)² × cos (41.4°)

q₁ = (1.672 N) (3×10² m)²/ (9 × 10⁹) (1.95×10⁻⁶ c) cos (41.4°)

q₁ = 5.715×10⁻⁸ C

Since,

q₂ = -5.715 × 10⁻⁸ C

Therefore, the charge q₁ and q₂ are 5.715 × 10⁻⁸ C and -5.715 × 10⁻⁸ C, respectively.

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Answer:

it will give one electron to the bromine atom, so the bromine atom will have 36 electrons.  this is an ionic bonding

Explanation:

Answer:

The answer is C. I took the test and got it Right

Explanation:

Answer: The answer is 120 Newton.

A car moves around a wide turn going 45 miles / hour the whole time. The car has a constant acceleration, therefore the correct answer is option D.

It is defined as motion when the object is moving in a circle with a constant speed and its velocity is changing with every moment because of the change of direction.

As given in the problem if a car moves around a wide turn going 45 miles/hour the whole time,

Even if the speed of the car is constant but the direction of the motion is changing continuously resulting in constant acceleration.

Thus, an automobile makes a wide turn while traveling at a constant 45 miles per hour. The right response is D since the automobile accelerates continuously.

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The dew point for the products of combustion is 52.9 °C.

(a) In practical fuel burners, air in excess of that theoretically required for complete combustion is needed to ensure that combustion is complete and that products of combustion are safe to discharge into the environment. The excess air provides additional oxygen that is used to complete the combustion of any combustibles that were not burned during the initial combustion process. The effect of excess air on the combustion process is that it lowers the temperature of the flame and reduces the concentration of pollutants in the flue gas.

(b) The complete combustion equation is: C10H22 + (32 + 11.5 × 2)O2 → 10CO2 + 11H2O

For complete combustion, the volume percentage of CO2 and O2 in the dry products of combustion is 8% and 10% respectively. The air-fuel ratio by mass can be calculated as follows:

Air-fuel ratio by mass = Mass of air / Mass of fuel

Mass of air = Mass of fuel × (1 + Excess air) Mass of fuel = 1 kg

Excess air = 20% = 0.2Air-fuel ratio by mass = (1 + 0.2) / 1 = 1.2

The dew point for the products of combustion can be calculated as follows:

Dew point = (288.3 / (ln(P / 100) - 42.677)) - 273, where P is the exhaust gas pressure in Pa.

Dew point = (288.3 / (ln(101325 / 100) - 42.677)) - 273Dew point = 52.9 °C

Therefore, the dew point for the products of combustion is 52.9 °C.

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The eight large, round bodies in the solar system that orbit, or revolve, around the sun and are usually ordered according to their distances from the sun are called planets.

These planets are classified as either terrestrial or gas giants. The terrestrial planets, which are closer to the sun, consist of Mercury, Venus, Earth, and Mars, they are characterized by their rocky composition and solid surfaces. The gas giants, located further from the sun, include Jupiter, Saturn, Uranus, and Neptune.

These planets are predominantly composed of gases, such as hydrogen and helium, and possess a more massive size compared to terrestrial planets, they also have numerous moons and ring systems. The order of the planets from the sun is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The distances between these planets and the sun, as well as their distinct compositions and characteristics, play a vital role in shaping the diverse environments found within our solar system. So therefore planets are the eight large, round bodies in the solar system that orbit, or revolve, around the sun and are usually ordered according to their distances from the sun,

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\(O = Q/4PiR^{2}\) is the surface charge density, sigma, on the outer surface of the conducting sphere.

The load per group of a double surface area is defined as surface charge density. It is a measurement of how much electric charge accumulates on a surface. It is represented by the symbol, and the SI unit is Coulombs for each square meter, abbreviated  \(Cm^{2}\).

A surface charge is a non-zero electric charge on a two-dimensional surface. These electric fields are constrained here on the 2-D surface, and the bias voltage on the surface is described by surface charge density, which is measured even in coulombs per square meter.

Surface charge density is defined in electromagnetism also as the quantity of electric charge per unit length, volume, or surface area. surface charge is inverse to the conductor radius of curvature.

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In the attached figure, north pole of magnet first moved down toward the loop of wire and withdrawn upward then the induced current in the loop is equals to the first clockwise, then counter-clockwise. So, option(d) is right one.

A magnet is a bar magnetic which produces the magnetic field and attract or reple other objects.

North pole of the magnet faces the loop. First it is move up away from the loop. According to Lenz's law, the induced current in the loop is such that it opposes the cause producing it. So, the current will try to pull back the magnet towards it. We knoe opposite pole attract each other, so the pole induced in the loop should be south. We also know that clockwise current produces a south pole and counterclockwise current produces a north pole. Hence the direction of current is clockwise. Then, the magnet is moved down towards the loop. For similar reasons, the loop will try to push it back up. Hence the current is counterclockwise so as to generate north pole.

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Complete question:

The attached figure complete the question.

Numerical Aperture (NA) is a measure of the ability of an optical system, such as a microscope, to gather and focus light.

The two light capturing lenses in a microscope are the objective lens and the eyepiece lens. The objective lens is located close to the object being viewed and is responsible for capturing the light that forms the image. The eyepiece lens is located close to the viewer's eye and magnifies the image produced by the objective lens.

The purpose of the condenser is to focus and direct light onto the object being viewed. It is located below the stage of the microscope and typically consists of a lens and an aperture. The aperture controls the amount of light that enters the microscope and helps to increase the resolution of the image by reducing the size of the light cone that enters the objective lens.

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Answer:

4 Ohms

Explanation:

Apply the formula:

Voltage = I (current) . Resistance

You can change it the way you want to use for your purpose.

In this case...

R = V/I

R = 12/3

R = 4 Ohms (Ohm is the unit of measurement of eletrical resistance)

The centripetal force on the turbine blade is 1332.3 N.

A force that causes a body to follow a curved path is known as a centripetal force. It always moves in a direction that is the opposite of the body's velocity and in the direction of the immediate center of curvature of the path.

When a constant speed circular motion is applied to an item, the centripetal force always acts inward since the object's velocity is tangential to the circle. This would imply that the direction of the force is always perpendicular to the direction in which the object is being moved.

The formula for centripetal force is

F = mω²r ........................ Equation 1

Where F = Centripetal force, ω = angular velocity, r = radius.

Where π = 3.1415

Given: m = 3 kg, ω = 0.5 rev/s = (0.5×2π) rad/s = 3.1415 rad/s, r = 45m.

Substitute into equation 1

F = 3(3.1415)²(45)

F = 1332.3 N

Hence the centripetal force on the turbine blade = 1332.3 N

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The frequency of oscillation of pendulum = 3.52Hz

What is frequency of oscillation of pendulum ?

The pendulum is a bob (weight) that swings from side to side. Thus, the frequency of the pendulum defines how oftentimes the pendulum movements from side to side in a selected length of time. For example, how oftentimes the pendulum movements from side to side in 60 seconds. The frequency of the pendulum is decided with the aid of using its length

The length of the simple pendulum (l) = 20 cm = 0.20 m

The mass of the ball (m) = 5.0 g

The speed of the car (v) = 70 m/s

The radius of the circle (r) = 50 m

The car is traveling in a circle which means it has centripetal acceleration, its formula is a = \(v^2/r\)

The frequency of the system can be solved by using \(f = 1/2\pi \sqrt{a/l}\)

\(f = 1/2\pi \sqrt{v^2/rl}\)

\(f = 1/2\pi \sqrt{70^2/50*0.20}\)

f = 3.52Hz

The frequency of oscillation of pendulum = 3.52Hz

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Explanation:

AVERAGE speed is   (144 - 0 ) /2 = 72 km/hr = 20 m/s

then in 20 swconds    20 m/s * 20 s = 400 meters

Answer: 40 miles

Explanation:

The course of action that has the highest EMV for the accompanying tree diagram is action B.

The total EMV resulting in each action is calculated by using the values given in the tree diagram as follows;

The total EMV resulting in action A is as follows;

EMV = 0 + 60 + 90 + 40 + 44 + 60

EMV = 294

The total EMV resulting in action B  is as follows;

EMV = 45 + 45 + 99 + 40 + 50 + 30 + 40 + 50

EMV = 399

Thus, from the values obtained in the calculations above, we can conclude that the course of action that has the highest EMV for the accompanying tree diagram is action B.

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