two solid brass rods ab and cd are brazed to a brass sleeve ef. determine page 522 the ratio d2/d1 for which the same maximum shearing stress occurs in the rods and in the sleeve.

Answer:

Ke²

Explanation:

So,

q1 = e

q2 = e

r = 1m

By coulumb's law,

F = K (q1q2/r²)

F = K (e)(e)/(1)²  

F = Ke²  

Option(a)

During a 30-10 million year period starting at about 4.5 billion years ago, bits and pieces of metal-rich particles, rocks, and ices accumulated to form the earth.

This is referred to as a type of planet which is habitable for different types of life forms. It is also the third planet from the sun and a majority of it contains water such as oceans etc.

Earth was formed billions of years ago through the bits and pieces of metal-rich particles, rocks, and ices which was in a 30-10 million year period which therefore makes it the correct choice.

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The cotton will fall slower than the heavy stone of same mass because of the density of the substances, which affects air resistance.

Air resistance is the action of friction that slows something moving through air.

It is worthy to note the air resistance is not dependent on the mass of an object but on the velocity and density of that object.

According to this question, a heavy stone and a cotton having same masses are dropped from certain height on the surface of the Earth.

Based on difference in densities, the cotton will fall slower than the heavy stone because the density of the stone is greater.

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Answer:

Any two forces that are always opposite from one another are :

Explanation:

1. action forces

2. reaction forces

Hi there!

Since we are dealing with such large distances, we can approximate.

Recall that the equation for speed is:

displacement / time = velocity

OR:

d/t = v

Begin by converting one hour to seconds:

1 hr  = 3600 sec

Now, we can solve for velocity:

(-2.0 × 10⁷) / 3600 = -5555.6 m/s ⇒ D: -5.55 × 10³ m/s

Answer:

44

Explanation:

Work = Force X Distance

The radiation is passed through the sheets, and if they are too thick or thin, the amount of radiation that passes through changes, and a signal is sent to the sheet rollers to adjust the thickness. Option C is the correct answer.

This process is called beta attenuation or beta gauge measurement. A radioactive source, usually a beta emitter, is placed on one side of the sheet, and a detector is placed on the other side. As the sheet passes through the beta gauge, beta particles emitted by the source pass through the sheet and are detected by the detector. The amount of beta particles detected is inversely proportional to the thickness of the sheet. Hence, Option: c is correct.

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You need to be aware of a star's apparent magnitude and spectral type in order to utilise spectroscopic parallax to determine its distance.

By examining a star's spectra and contrasting it with another star's spectrum, a technique called spectroscopic parallax can be used to calculate a star's distance. In order to determine the star's absolute magnitude, its apparent magnitude must also be known. The absolute magnitude of the star can be calculated using the Hertzsprung-Russell diagram by knowing the luminosity and temperature of the star, which are dependent on the spectral type of the star. The inverse square law of distance can be used to determine the distance to the star by comparing the absolute magnitude to the apparent magnitude.

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Answer:

his acceleration rate is -0.00186 m/s²

Explanation:

Given;

initial position of the car, x₀ = 100 miles = 160, 900 m ( 1 mile = 1609 m)

time of motion, t₀ = 60 minutes = 60 mins x 60 s = 3,600 s

final position of the car, x₁ = 150 miles = 241,350 m

time of motion, t₁ = 100 minutes = 100 mins x 60 s = 6,000 s

The initial velocity is calculated as;

u = 160, 900 m / 3,600 s

u = 44.694 m/s

The final velocity is calculated as;

v = 241,350 m / 6,000 s

v = 40.225 m/s

The acceleration is calculated as;

\(a = \frac{\Delta V}{\Delta t} = \frac{v- u}{t_1 - t_ 0} = \frac{40.225 - 44.694}{6000-3600} = -0.00186 \ m/s^2\\\\\)

Therefore, his acceleration rate is -0.00186 m/s²

Answer:

15 kg ball

Explanation:

Answer:

Answer:

ethylene

Explanation:

ethylene is a compound consist of two double bonded carbon atom and four hydrogen atoms at room temperature is a gas

Answer:

Ethylene

Explanation:

Because Ethylene is a simple molecule composed of two double-bonded carbon atoms and four hydrogen atoms. It's a gas at room temperature. Ethylene molecules can be chemically bonded, end to end, to form a polymer named polyethylene.

Answer:

too much :(

Explanation:

\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}

\overline{a} = average acceleration

v = final velocity

v_0 = starting velocity

t = elapsed time

Answer:

a = Δv⁄t.

Explanation:

In a purely resistive circuit, the phase difference between the voltage and current is zero, which means the circuit consumes all the power delivered to it by the source. In other words, the power delivered is entirely converted into heat energy dissipated by the resistance. Therefore, 100% of the apparent power is used or consumed in a purely resistive circuit. So this statement is true.

Apparent power is the product of the root mean square (RMS) voltage and RMS current, and it represents the total power delivered to the circuit. In a purely resistive circuit, the apparent power and real power are equal since there is no reactive power. Reactive power arises in circuits with inductance and capacitance, where energy is stored and returned to the circuit, leading to a phase shift between voltage and current.

In a purely resistive circuit, the current and voltage are in phase with each other, meaning they reach their maximum and minimum values at the same time. This results in a power factor of 1, which indicates that all of the apparent power drawn by the circuit is converted into real power, which is the actual power consumed by the resistive elements in the circuit. Therefore, it is true that 100% of the apparent power is used or consumed in a purely resistive circuit.

This is not the case in circuits that have reactive elements, such as inductors and capacitors, where the current and voltage are out of phase with each other. This results in a power factor that is less than 1, and the apparent power drawn by the circuit includes both real power and reactive power. In such cases, some of the apparent power is not consumed by the resistive elements but instead is stored in the reactive elements and returned to the circuit at a later time.

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No atomic  model is a picture of an atom but only helps explain the behavior of one

We know that the atom is the smallest particle of a substance that is able to take part in a chemical reaction. We know that in the atom there are certain smaller particles that we can be able to refer to as the subatomic particles.

In this case, we are talking about the different models that we can be able to use to show the atom. None of these models can be said to show the atom exactly but can approximate how the atom behaves.

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Answer:

  1.9 km​

Explanation:

The equation for vertical motion is ...

  h(t) = -4.9t^2 +26t +20

This will have a zero near t = 5.988 seconds.*

The horizontal distance traveled in that time is ...

  (310 m/s)(5.988 s) ≈ 1856 m ≈ 1.9 km

_____

* The root of a quadratic can be found numerous ways. We choose the quick and easy: let a graphing calculator show it to you.

Angle 32rad turn during that time if the angular acceleration is constant.

What is acceleration?

acceleratiom, rate at which the  velocity changes with time, in terms of both speed and the  direction. A point or else it's an  object moving in a straighten line is accelerated if it is  speeds up or slows down. Motion on a circle is the  accelerated even if the  speed is constant, because of  the direction is continually changing.

Sol-  In an uniformly accelerated circular motion, the angle traveled by the object is given by-

∆=wf+wo/2×t

Here  wf is the final angular speed .

It is the initial angular speed and t is the time of the motion. Replacing the given values-

∆= 12 rad/s + 4 rad/s /2 (4s)

∆= 32rad .

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Answer:

Wave Speed (m/s)

31.25

Summary

Wavelength (m)6.25

Frequency (hz)5

Explanation:

https://calculator.academy/wave-speed-calculator/#f1p1

Seismic velocities are influenced by the medium's physical characteristics, including composition, mineral phase and packing structure, temperature, and pressure.

Denser materials allow seismic waves to propagate more quickly, hence depth generally increases the speed of seismic waves. Seismic waves are slowed in abnormally hot regions. A liquid conducts seismic waves more slowly than a solid does. Due to the fact that P waves and S waves cannot propagate through liquid, molten regions of the Earth slow P waves and block S waves.

There are two different types of waves produced by earthquakes: primary (P) and secondary (S). Based on when they come and how they feel on the surface, they are classified.

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The physical properties of the medium, such as composition, mineral phase and packing structure, temperature, and pressure, have an impact on seismic velocities.

What are seismic wave?

The speed of seismic waves is typically increased by depth because denser materials allow for faster seismic wave propagation. In areas that are abnormally hot, seismic waves slow down. Seismic waves are conducted more slowly by liquids than by solids. Molten parts of the Earth impede P waves and block S waves because P waves and S waves cannot travel through liquid.

Primary (P) and secondary (S) waves are the two main types of seismic waves that are generated. They are categorized based on when they arrive and how they feel on the surface.

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Answer:

1st

Explanation:

20 meters per second

Explanation:

look at the chart

Planet A exerts a force on planet B, the magnitude and direction of the gravitational force planet B exerts on planet A the gravitational force exerted by planet B on planet A is the same as the magnitude of the gravitational force exerted by planet A on planet B

Newton's third law states that if object A exerts a force on object B, then object B exerts an equal and opposite force on object A. Hence, if planet A exerts a gravitational force on planet B, then planet B exerts an equal and opposite gravitational force on planet A.The magnitude of the gravitational force exerted by planet B on planet A is the same as the magnitude of the gravitational force exerted by planet A on planet B, this is according to the law of universal gravitation,

This law states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. The direction of the gravitational force exerted by planet B on planet A is towards planet B's center, just as the direction of the gravitational force exerted by planet A on planet B is towards planet A's center. Therefore, we can say that the magnitude and direction of the gravitational force planet B exerts on planet A is equal and opposite to the gravitational force planet A exerts on planet B

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Answer:

c > √(2ab)

Explanation:

In this exercise we are asked to find the condition for c in such a way that the results have been real

The given equation is

              ½ a t² - c t + b = 0

we can see that this is a quadratic equation whose solution is

             t = [c ±√(c² - 4 (½ a) b)]  / 2

for the results to be real, the square root must be real, so the radicand must be greater than zero

              c² -2a b > 0

              c > √(2ab)

Answer: the answer is 108 N

Just took the test and got 108 N correct

Answer:

40

Explanation: 1 hour and 15 min is 1.25 hour.

50km   -->    1.25 h

x km     -->    1 h

50 km * 1h = x km*1.25h

x = 40 average speed of car is 40

Answer:

23.4 kg m/s

Explanation:

p = mv = 0.013kg × 1800m/s = 23.4 Kg.m/s

The reflex that prevents a person from passing out when they stand up is known as the "baroreceptor reflex." This reflex is initiated when specialized pressure sensors, known as baroreceptors, located in the walls of the large arteries in the neck and chest detect a decrease in blood pressure.

When blood pressure drops, the baroreceptors send signals to the brain, which responds by increasing sympathetic nervous system activity. This causes the heart rate to increase and blood vessels to constrict, which helps to maintain blood pressure and prevent fainting.

Additionally, the baroreceptor reflex also causes the release of hormones such as adrenaline and noradrenaline, which further increase heart rate and constrict blood vessels.

Overall, the baroreceptor reflex is a crucial mechanism for maintaining blood pressure and preventing fainting during changes in posture. Without this reflex, a person would be at risk of passing out every time they stood up, which could lead to injury or other complications.

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Answer:

Friction

Explanation:

edge 2022

This method of transferring charge by rubbing objects is charging by friction.

Charging is defined as the phenomenon of transferring charge between two objects by supplying electrons between the objects.

Here,

The student done an experiment of rubbing a glass rod with a piece of silk and as a result, static charge is produced.

This is because, when the two objects are rubbed against each other, there occurs a friction between them. During this process, the glass rod that has free electrons that are freely bound to it will transfer its electrons to the piece of silk cloth. As a result, the glass rod will lose electrons and will have an electron deficiency, that means the glass rod becomes positively charged. At the same time, the silk cloth will acquire the electrons and the piece of silk becomes negatively charged.

This phenomenon of transferring charge between two objects when they are rubbed against each other is called charging by friction.

Hence,

This method of transferring charge by rubbing objects is charging by friction.

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Mercury's higher eccentricity means it has a more elongated and non-circular orbit compared to Venus.

The eccentricity of a planet's orbit refers to how elliptical or circular its orbit is. A higher eccentricity indicates a more elongated and elliptical orbit, while a lower eccentricity signifies a more circular orbit.

In the case of Mercury, having the highest eccentricity among the planets in the solar system means that its orbit is significantly more elongated and less circular compared to the other planets.

Mercury's eccentricity is approximately 0.21, which means its orbit deviates more from a perfect circle compared to Venus. Venus, on the other hand, has a relatively low eccentricity of around 0.0067, indicating a nearly circular orbit. This makes Venus' orbit much closer to being circular compared to Mercury.

The high eccentricity of Mercury's orbit leads to significant variations in its distance from the Sun throughout its orbit. At its closest approach to the Sun (perihelion), Mercury is about 46 million kilometers away, while at its farthest point (aphelion), it is approximately 70 million kilometers away. In contrast, Venus has a more stable distance from the Sun throughout its orbit due to its lower eccentricity.

In summary, Mercury's higher eccentricity means it has a more elongated and non-circular orbit compared to Venus, resulting in greater variations in its distance from the Sun during its revolution.

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