give reason
3. Glass vessel cracks when hot water is poured.I will mark he or she brainiest if the answer is correct.​

Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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Answer:

A

Explanation:

The Clausius-Clapeyron relation predicts that for every 1 K increase in surface temperature, assuming relative humidity and near-surface wind speeds are fixed, the evaporation from the surface will increase by approximately 7%.

The original climate's temperature was 15.5°C (rounded off from 15.47°C), and in the perturbed climate, it increased to 19.57°C.

Therefore, the increase in temperature was 4.07°C.

For every 1 K increase in surface temperature, the Clausius-Clapeyron relation predicts that the evaporation from the surface will increase by approximately 7%.

Thus, the increase in evaporation rate will be:4.07 x 7% = 0.2849 or approximately 0.28 cm/year.

Therefore, the new value of evaporation will be:100 + 0.28 = 100.28 cm/year. It should be rounded off to 100 cm/year.

The increased precipitation will cause more water to seep into the pores of the Toronto sidewalk, which will freeze and expand in winter, exacerbating the physical weathering of the sidewalk.

The physical weathering rate will increase. As a result, other forms of weathering, such as chemical weathering, may be accelerated. As a result, the sidewalk's physical and chemical weathering will be significantly affected.

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The enemy is 1,122.6 meters away when you open fire.

We can use the Rayleigh criterion, which states that two point sources are just resolvable if the center of the Airy disk of one is directly over the first minimum of the Airy disk of the other.

The angular resolution is given by:

θ = 1.22 λ/D

where λ is the wavelength of the light, and D is the diameter of the pupil.

θ = 1.22 x (555 x 10^-9 m) / 4.9 x 10^-3 m = 1.38 x 10^-5 radians

Now, we can use trigonometry to determine the distance at which an object of 3.1 cm would subtend an angle of 1.38 x 10^-5 radians:

tan θ = opposite/adjacent

tan (1.38 x 10^-5) = 0.0155 m / distance

distance = 0.0155 m / tan (1.38 x 10^-5) = 1,122.6 meters

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Answer:

the greater the half life is the slower the rate of decay will be.

Explanation:

half life of a radioactive substance is inversely proportional to the radioactive decay.

Answer:

B. The greater the half life is, the slower the rate of decay will be

Explanation: Most living things contain carbon-14, an unstable isotope of carbon that has a half-life of around 5,000 years. That means that when scientists dig up fossil bones, they can figure out how old they are by measuring the amount of carbon-14 remaining in the bones.

9.8 J of work done is required to launch the item (Option C).

To determine the work done in launching the object, we can use the formula:

Work = Force x Distance x Cos(theta)

where theta is the angle between the force vector and the direction of motion. In this case,

since the force is applied in the same direction as the motion of the object, theta is 0 degrees, and cos(theta) is 1.

Substituting the given values, we get:

Work = 19.6 N x 0.50 m x 1 = 9.8 J

Therefore, the work done in launching the object is 9.8 J (Option C).

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Complete question:

Question asked: how much work is done in launching the object?

Information in the passage included: 1.00 kg object initially at rest. The student applies a force of 19.6 N through a distance of .50 m to propel the object straight upward.

Momentum of the elephant is 69.3 kg-m/s

Momentum is a property of a moving body by the virtue of its motion and is a product of mass and velocity.

As per Newton's second law of motion,

momentum= mass x velocity

Mass of the elephant is given as 6300kg

Velocity of elephant is given as 0.11 m/s

Therefore,

momentum = 6300 x 0.11

                      69.3 kg -m /s

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Sound travels faster in water that it does in air, but sound travels slower relative to light.

According to physics, sound is a vibration that moves as an acoustic wave across a transmission medium like a gas, liquid, or solid. In terms of human physiology and psychology, sound is the brain's receipt of these waves and its perception of them. Only the audio frequency range, or acoustic waves with frequencies generally between 20 Hz and 20 kHz, can provide a person an aural sense. These sound waves have wavelengths in air at atmospheric pressure that range from 17 meters (56 feet) to 1.7 millimeters (0.67 in). Inaudible to humans, ultrasounds are sound waves having a frequency higher than 20 kHz. Sound frequencies below 20 Hz are referred to as infrasound. Different species of animals have varying hearing ranges.

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Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 5200 × 25

We have the final answer as

Hope this helps you

Answer:

Electrical Conductivity

Explanation:

it was on test

Answer:

C. Electrical conductivity

The temperature of the water and copper beaker be together is 29.6⁰C.

The final temperature or equilibrium temperature of the water and copper beaker is calculated by applying the principle of conservation of energy.

Heat lost by the water = Heat gained by the copper beaker

mcΔθ (water) = mcΔθ (copper)

where;

m₁c₁(T₁ - T) = m₂c₂(T - T₂)

where;

Specific heat capacity of copper, c₂ = 389 J/kgK

Specific heat capacity of water , c₁ = 4200 J/kgK

(2)(4200)(30 - T) = (1)(389)(T - 20)

252,000 - 8400T = 389T - 7780

259,780 = 8789T

T = 259,780 /8789

T = 29.6⁰C

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Answer:

13

Explanation:

The mass of an atom= number of protons + number of neutrons

Answer:

0.2s

Explanation:

wave formula

v=(lambda)f

20=(4)f

20÷4

=5Hz

1÷5

T=0.2s

The period of a wave travelling with a speed of 20 m/s and the wavelength is 4.0 m is 0.2 sec.

What is time period?

The length of time it takes a wave to complete one cycle is known as the wave's period. The frequency of the wave must be known in order to compute the wave period. The number of cycles a wave may complete in a period of time—typically one second—is its frequency.

wave formula

v = (lambda)f

20 = (4)f

20÷4

f = 5 Hz

T = 1/f

T = 1÷5

T = 0.2 sec

The period of a wave travelling with a speed of 20 m/s and the wavelength is 4.0 m is 0.2 sec.

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Answer:Entropy can be thought of as a measure of the dispersal of energy. It measures how much energy has been dispersed in a process. The flow of any energy is always from high to low. Hence, entropy always tends to increase.

Explanation:

Answer:

Average velocity is 7.27m/s.

Explanation:

Given the following parameters;

Distance (d) = 40m

Time (t) = 5.5secs

Velocity =?

Velocity can be defined as the rate of change in displacement (distance) with time.

Mathematically, velocity is given by the equation;

\(Velocity = \frac{distance}{time}\)

\(V = \frac{d}{t}\)

Substituting into the above equation;

\(V = \frac{40}{5.5}\)

V = 7.27m/s

Hence, Rita's average velocity is 7.27m/s.

The greatest height the ball will attain is 3.27 m

The maximum height to which the ball can attain can be obtained as follow:

v² = u² – 2gh (since the ball is going against gravity)

0² = 8² – (2 × 9.8 × h)

0 = 64 – 19.6h

Collect like terms

0 – 64 = –19.6h

–64 = –19.6h

Divide both side by –19.6

h = –64 / –19.6h

h = 3.27 m

Thus, the greatest height the ball can attain is 3.27 m

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The magnitude of the kinetic frictional force acting on the box is approximately 9.8 N.

To calculate the magnitude of the kinetic frictional force, we can use the formula:

Frictional force = coefficient of kinetic friction * normal force,

where the normal force is equal to the weight of the box.

The weight of the box can be calculated using the formula:

Weight = mass * gravitational acceleration,

where the gravitational acceleration is approximately \(9.8 m/s^2\).

Substituting the given values, we have:

Weight = 5 kg * \(9.8 m/s^2\) = 49 N.

Now we can calculate the magnitude of the kinetic frictional force:

Frictional force = 0.2 * 49 N = 9.8 N.

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--The complete Question is, A box is being pulled to the right with a force of 100 N. The box experiences a kinetic frictional force. The mass of the box is 5 kg and the coefficient of kinetic friction between the box and the surface is 0.2. What is the magnitude of the kinetic frictional force acting on the box? --

The altitude and atmospheric density are inversely related and the atmospheric density at 1291 km is 0.51 km/m³.

The atmospheric density is decreasing with an increase in altitude, thus altitude and atmospheric density are inversely related.

In the given plot, 1291 km must be closer to the 1000 km point with the corresponding atmospheric density of 54 kg/m³.

Therefore, the altitude and atmospheric density are inversely related and the atmospheric density at 1291 km is 0.51 km/m³.

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The potential energy of a 25 kg bicycle resting at the top of a hill 3 m high will be 735.75 J.

The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.

The potential energy is mainly depending upon the height of the object. when the cyclist is at the highest position, the height is maximum. Therefore, the potential energy is also maximum.

The potential energy is found as;

PE=mgh

PE=25 kg× 9.81 m/s² ×3 m

PE= 735.75 J.

Hence, the potential energy of a 25 kg bicycle resting at the top of a hill 3 m high will be 735.75 J.

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Answer:

they reflect light waves

Explanation:

The tiny drops or ice particles in clouds scatter between 20 and 90 percent of the sunlight that strikes them

Answer:

They reflect light waves

Explanation:

______________________________

______________________________

Answer:

In chemistry, a nonmetal is a chemical element that is mechanically weak in its most stable form, brittle if solid, and usually gains or shares electrons in chemical reactions. There is no universal agreement on which elements are nonmetals; the numbers generally range from fourteen to twenty-three, depending on the criterion or criteria of interest.

Answer:

Non-metals are those which lack all the metallic attributes. They are good insulators of heat and electricity. They are mostly gases and sometimes liquid. Some they are even solid at room temperatures like Carbon, sulphur and phosphorus.

Explanation:

Hydrogen, hydrogen, chlorine, fluorine, carbon, nitrogen, arsenic, phosphorus, selenium are examples of non-metal.

hope i helped

The output at the BAT terminal is DC voltage.

A generator typically produces AC voltage but since most batteries and appliances uses DC voltage therefore through the use of diodes it is converted into DC voltage

A diode is an electrical component that allows the flow of current in only one direction. In circuit diagrams, a diode is represented by a triangle with a line across one vertex. The most common type of diode uses a p-n junction.

Six diodes are located in the end frame assembly nearest the slip rings.

Three of these diodes are negative and are mounted directly in the end

frame.

Three positive diodes are mounted into a heat sink, which is insulated from the end frame. These six diodes (three positive and three negative), change AC from the stator windings to a flow of DC, which appears at the output terminal of the alternator.

Thus, the rotor, stator, and diodes act together to produce DC voltage which appears at the BAT (output) terminal.

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Answer:

i think it was kneading because of that constant gravitational war between two interstellar celestial bodies one is also molding the other with its gravitational force so that way between the moon and the earth is a gravitational war between the two objects

Explanation: DO BE WARNED . i am not 100% sure if this was the correct term or not so please do consider this warning.

A net forward force as well as gravitational force pulls the marble downwards whereas frictional force slows it down.

A force is an agent which causes a change in the motion or state of an object.

Forces are of two types:

Andrew applies force on the marble causing it to move.

When Andrew pokes the marble, he gives it net forward force. As the marble rolls down the ramp, gravitational force pulls it down.

The movement of the marble is slowed down by frictional force from the ramp.

Therefore, a combination of applied force and gravitational force moves the marble forward, while frictional force slows it down.

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Answer:

Applied, Gravitational, and Frictional.

Explanation

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The total pressure in the flask is 2.37 atmospheres. This can be obtained by adding the partial pressures of argon (0.72 atm) and oxygen (1.65 atm) together.

In a mixture of gases, each gas exerts a partial pressure proportional to its concentration. To find the total pressure, we need to sum up the partial pressures of all the gases present.

In this case, the flask contains argon and oxygen. The partial pressure of argon is given as 0.72 atm, and the partial pressure of oxygen is given as 1.65 atm. To find the total pressure, we simply add these two partial pressures together:

Total pressure = Partial pressure of argon + Partial pressure of oxygen

= 0.72 atm + 1.65 atm

= 2.37 atm

Therefore, the total pressure in the flask is 2.37 atmospheres.

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Answer:\(\theta =64.29^{\circ}\)

Explanation:

Given

Vector Points -1.55 units along x-axis

i.e. 1.55 units along negative x-axis

and 3.22 units along Y-axis

Direction of vector

\(\tan \theta =\frac{3.22}{1.55}\)

\(\theta =tan ^{-1}(2.077)\)

\(\theta =64.29^{\circ}\)

Where \(\theta \) is the angle made by vector with x-axis as shown in the diagram

Answer:

The answer is 115.70

Explanation:

Answer:

10^-6m^3

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