Which choice is not an example of a molecule? O3 NCl3 F H2O2

Answer:

I think C? I'm not sure totally though...

Explanation:

The expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by E = Y * e * ln(L) * A

The work done to stretch the wire can be calculated by integrating the force applied over the displacement. In this case, the force applied is the tension (T) in the wire, and the displacement is the change in length (ΔL) from the original length (L) to the stretched length (L + ΔL).

The tension in the wire is given by Hooke's law, which states that the tension is proportional to the extension of the wire:

T = Y * (ΔL / L)

where Y is the Young's modulus of the material of the wire.

Now, let's calculate the work done to stretch the wire:

dW = T * dL

Integrating this expression from L to L + ΔL:

W = ∫ T * dL = ∫ Y * (ΔL / L) * dL

W = Y * ΔL * ∫ (dL / L)

W = Y * ΔL * ln(L) + C

Here, C is the constant of integration. Since the energy stored in the wire is zero when it is unstretched (ΔL = 0), we can set C = 0.

Finally, the expression for the energy stored in the wire (E) is:

E = W = Y * ΔL * ln(L)

or, if we substitute the cross-sectional area (A) and strain (e) of the wire, where e = ΔL / L:

E = Y * e * ln(L) * A

Thus, the expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by:

E = Y * e * ln(L) * A

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The frequency of the signal with a period of 0.0034 seconds is approximately 294.1176 Hz.

The frequency of a signal is the reciprocal of its period. The formula to calculate frequency (f) is:

f = 1 / T

Where T is the period.

In this case, the period is given as 0.0034 seconds. Substituting this value into the formula, we can calculate the frequency:

f = 1 / 0.0034 seconds

f = 294.1176 Hz

Therefore, the frequency of the signal with a period of 0.0034 seconds is approximately 294.1176 Hz.

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The correct and is A or jet streams, trade winds, and Coriolis effect

Answer:

2. Jet streams, Polar Easterlies, and Trade winds

Explanation:

It isn't one because the Coriolis effect is an effect or something that causes something else. (it causes things to curve like other winds and stuff) Not three because Sea breezes are winds that travel short distances, occur at night, at the beach, Not for because it also has Coriolis effect and it also has breezes for some reason. So, your answer will be 2.

Hope this helped!

Stay safe!

Every 1,580 days (4.33 years), 2004 TL10 completes one circle around the sun. Its distance from the sun orbit from 0.91 AU to 4.39 AU. Considering its brightness and how it reflects light,

Along with rotating, often rather erratically, the asteroids tumble through their elliptical orbits around the Sun. More than 150 asteroids are known to have a small companion moon (some have two moons).

A: Due to the way our solar system evolved, the planets of our solar system orbit the Sun in a counterclockwise manner (as viewed from above the Sun's north pole). A cloud of gas and dust gave birth to our Sun, and its byproducts, the solar nebula, later gave birth to the planets.

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Thomas Young was a British scientist who described the phenomenon of thin film colors due to light scattered from a thin layer of a material, such as a soap bubble or a layer of oil on water.

This phenomenon is known as interference, where the light waves reflecting from the front and back surfaces of the thin film interfere with each other, resulting in certain wavelengths of light being reinforced and others being canceled out. This leads to the appearance of different colors depending on the thickness of the film and the angle of the incident light. Thomas Young's work on thin film interference laid the foundation for the study of optics and has important applications in industries such as electronics and coatings.

Young's explanation of thin film colors was based on the wave nature of light. He proposed that when light waves are reflected from a thin film, they interfere with each other and produce a pattern of constructive and destructive interference. The resulting pattern determines the color that is observed.

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The reflection coefficient is approximately 0.025, which means that 2.5% of the incident wave intensity is reflected.

The amount of energy that is reflected depends on the difference in acoustic impedance between the two materials. Acoustic impedance is the product of the density and the speed of sound in the material.

\(R = [(Z2 - Z1)/(Z2 + Z1)]^2\)

Substituting the values into the formula for the reflection coefficient, we get:

\(R = [(Z2 - Z1)/(Z2 + Z1)]^2\)

\(R = [(1.1Z1 - Z1)/(1.1Z1 + Z1)]^2\)

\(R = [(0.1Z1)/(2.1Z1)]^2\)

\(R = 0.025\)

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Answer:

a. The friction force acting on the truck's tires during the turn, is approximately 20,875 N

b. The maximum velocity with which the truck could make the bend is approximately 31.654 m/s

Explanation:

The given parameters of the truck are;

The mass of the truck, m = 2.5 × 10³ kg

The tire material = Rubber

The radius of the turn the through which the truck moves = 120 meters

The material and condition of the surface = Dry asphalt

a. The coefficient of friction of rubber tires on dry asphalt, μ ≈ 0.85 (researchgate (internet source))

The weight of the truck, W = m × g

Where;

m = The mass of the truck = 2.5 × 10³ kg

g = The acceleration due to gravity = 9.8 m/s²

∴ W = 2.5 × 10³ kg × 9.8 m/s² = 24,500 N

The force of friction acting on the tires, \(F_f\) = W × μ

∴ \(F_f\) = 24,500 N × 0.85 ≈ 20,875 N

The friction force acting on the truck's tires during the turn, \(F_f\) ≈ 20,875 N

b. The centrifugal force the truck observes while turning through the bend, 'F', is given as follows;

F = m·v²/r

Therefore, the maximum velocity with which the truck could make the bend, 'v', is given when fiction force, '\(F_f\)', is equal to the centripetal force, F

When \(F_f\) = F, we have;

W × μ = m·v²/r

∴ 20,875 N = 2.5 × 10³ kg × v²/(120 m)

∴ v² = 20,875 N × (120 m)/(2.5 × 10^3 kg) = 1002 m²/s²

v = √(1002 m²/s²) ≈ 31.654 m/s

The maximum velocity with which the truck could make the bend, v ≈ 31.654 m/s

According to this question;

QUESTION 1:

Where;

QUESTION 2:

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If the radius of the cylinder is halved and length is kept unchanged then the density of air inside the cylinder will increase.

As it can be said that density is inversely proportion to the square of the radius.

Density of Cylinder

Density is the ratio of mass to volume.

The formula for density is: ρ= m/v.

The formula for the Mean Density of a cylinder is:

                                         ρ= m/ (π•r²•h)

where:

ρ is the density of the cylinder

m is the mass of the cylinder

h is the height of the cylinder

So, with increase in radius the of the cylinder there is decrease in the density of cylinder.

And on decreasing the radius of the cylinder there is increase in the density of the cylinder.

As it can be said that density is inversely proportion to the square of the radius.

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What is the tangential acceleration of a gyroscope flywheel?

The tangential acceleration can be calculated as follows:

The equation of tangential acceleration is:

\(a_{t}=a_{}\)·\(r\)

Where, \(a_{t} =\) tangential acceleration

\(a\) = radial acceleration

\(r\) = radius of flywheel

\(a_{t} =\) (11.1 \(\frac{rad}{s^{2} }\))·(3.38cm)

\(a_{t}\) = 37.518\(\frac{rad}{s^{2} }\)

The tangential acceleration is 37.518\(\frac{rad}{s^{2} }\)

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The magnitude of the net linear acceleration of the car 13.0 s later is 7.15 m/s².

The net linear acceleration of an object moving in a circular path can be calculated using the equation:

a = v² / r

where a is the net linear acceleration, v is the velocity of the object, and r is the radius of the circular path.

In this case, the car starts from rest, so its initial velocity (v₀) is 0. The velocity of the car (v) after 13.0 s can be calculated using the equation:

v = v₀ + at

where t is the time and a is the constant rate of acceleration.

Substituting the given values, we have:

v = 0 + (0.550 m/s²) * (13.0 s) = 7.15 m/s

Now, we can calculate the magnitude of the net linear acceleration:

a = (7.15 m/s)² / 26.0 m = 7.15 m/s²

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Therefore for cart to stay here on track when it arrives at point P, the net force applied to it must be greater or equal than for the heaviness of the cart.

The force is an impact that has the power to alter an object's motion. A mass-containing object's velocity can be altered by a force. An obvious way to describe force is as a pushed or a pull. A vector quantity is called a force since it has both strength and the direction.

The strongest force in existence is thought to be the strong force. The gravitation, weak, and electromagnetism forces come after it in lowest to highest.

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To raise the automobile with a hydraulic lift, a force of approximately 19,000 N must be applied to the piston.

In a hydraulic lift, the principle of Pascal's law is applied, which states that pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and the walls of its container. By utilizing this principle, a smaller force applied to a smaller piston can generate a larger force on a larger piston.

In this scenario, the force needed to lift the automobile can be calculated using the formula:

\(\frac{F_{1}}{A_{1}} =\frac{F_{2}}{A_{2}}\)

where \(F_{1}\) is the force applied to the piston, \(A_{1}\) is the area of the piston, \(F_{2}\) is the force generated on the larger piston (required to lift the automobile), and \(A_{2}\) is the area of the larger piston.

Given the radius of the shaft (small piston) as 0.08 m and the radius of the piston as 0.01 m, we can calculate the forces applied and generated as follows:

\(A_{1} = \pi (0.08)^2\\A_{2}= \pi (0.01)^2\)

\(\frac{F_{1}}{A_{1}} =\frac{F_{2}}{A_{2}}\)

Simplifying the equation and substituting the values, we can solve for \(F_{2}\):

\(F_{2}=\frac{F_{1}A_{2}}{A_{1}}\)

Plugging in the values, we find:

\(F_{2}=\frac{F_{1} \pi (0.01)^2 }{ \pi (0.08)^2} \\F_{2}= \frac{F_{1}\times 0.0001}{0.0064} \\F_{2}= 0.015625 \times F_{1}\)

Given that the mass of the automobile is 1520 kg and the acceleration due to gravity is \(9.8 \hspace m/s^{2}\), we can equate \(F_{2}\) to the weight of the automobile:

\(F_{2}= mg\\0.015625\times F_{1}= 1520\times 9.8\)

Solving for \(F_{1}\), we find:

\(F_{1}\approx \frac{1520\times 9.8}{0.015624} \\F_{1} \approx 19072 \hspace N\)

Therefore, a force of approximately 19,000 N must be applied to the piston in order to raise the automobile using the hydraulic lift.

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Answer: A.

current (thumb) to magnetic field (fingers)

Answer:

A. current (thumb) to magnetic field (fingers)

Explanation:

According to the Right-Hand Thumb rule, if we are holding a current- carrying straight conductor in our right hand such that the thumb points toward the direction of current, then the fingers will wrap around the conductor in the direction of the field lines of the magnetic field.

Hope it helps.

If you have any query, feel free to ask.

The lapse rate of the meteorological station from the ground to 700mb is approximately -10°C/km or -16°C/mile.

Explanation: The lapse rate is a measure of how temperature changes with height in the atmosphere. It indicates the rate at which the temperature decreases as you move upward in the atmosphere. To calculate the lapse rate, we need to determine the temperature difference between the surface and 700mb, and then convert it to the appropriate units.

Given that the temperature at the surface is 90°F and the temperature at 700mb is 20°F, we need to convert these temperatures to Celsius before calculating the lapse rate.

90°F is approximately 32.2°C and 20°F is approximately -6.7°C. The temperature difference between the surface and 700mb is 32.2°C - (-6.7°C) = 38.9°C.

Since the 700mb level is 3km above the ground, we can convert the lapse rate to the appropriate unit.

1 kilometer is approximately 0.6214 miles. Therefore, the lapse rate would be approximately (38.9°C / 3km) * (0.6214 miles/km) = -16°C/mile.

Hence, the lapse rate of the meteorological station from the ground to 700mb is approximately -10°C/km or -16°C/mile, indicating a decrease in temperature with increasing altitude.

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(a) The tension in the tow line is 500 N.

(b) The distance travelled by the car before coming to rest is 10 m.

The tension in the tow line is calculated by applying the following formula as shown below.

T = ma

where;

T = 1000 kg x 0.5 m/s²

T = 500 N

The distance travelled by the car before coming to rest is calculated as follows;

a = F / m

a = ( 5000 N ) / ( 1000 kg )

a = 5 m/s²

v² = u² - 2as

where;

2as = u²

s = ( u² ) / ( 2a )

s = ( 10² ) / ( 2 x 5 )

s = 10 m

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Answer:

It comes from the same place that any claim about gods comes: the human imagination.

Explanation:

Various scholars have come up with different times of year for the guy to have been born - if indeed he existed as a single man, and not a pastiche of several itinerant preachers of the time. The one that has the least support in any literature that survives, is December 25.

The reason that date was picked was because the early church wanted to convert pagans, and a common pagan festival was held at the Winter solstice, when the days finally stopped getting shorter and began getting longer again (yay! drinking, merriment, and fellowship, and a new year coming!). So they declared a holiday/birthday at that time, so the pagans would not lose their celebration if they converted. At the time, the officers of the early church had no idea that the southern hemisphere was seeing exactly the opposite trend-reversal, or they didn’t care, because the pagans they were interested in recruiting were local (mostly within and bordering the Roman empire). They didn’t know or care about south Africans or Australian aborigines or South American indigenes who would have been looking to observe their SUMMER solstice and the less-happy trend toward darkness and shortened days.

Answer:

easy

speed = distance/time = 50 / 0.3 = 500/3 m/sec

Answer:jkknbfds

Explanation:jjbhfdrtb

Answer:

c. hope this helped

Explanation:

Answer:

True

Explanation:

It is true that. A technician can be electrocuted when working on HEVs or EVs, therefore the correct answer is option A

An EV stands for an electric vehicle. Electric vehicles (EVs) are autos that are powered totally or partially by electricity. Electric cars are extremely cost-effective to run because they have fewer moving parts to maintain and use little to no fossil fuels (petrol or diesel).

When evaluating its environmental impact, every factor must be taken into consideration. Considering that EVs have a minimal overall environmental impact, this suggests that the severity of these production emissions decreases.

Recycling is one strategy for lowering the lifespan emissions of electric vehicles. Again, incorrect assumptions can be refuted by facts.

Thus, That is accurate. The correct response is option A because a technician could electrocute themselves while working on HEVs or EVs.

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The force of tension on the chain connecting the car and the truck must be equal in magnitude and opposite in direction to the force exerted by the car.

When the car is being pulled forward with a constant velocity, it means that the net force acting on the car is zero. According to Newton's first law of motion, an object at rest or moving with a constant velocity will continue to do so unless acted upon by an external force.

In this case, the force of tension on the chain provides the external force necessary to keep the car moving at a constant velocity.The force of tension in the chain must be equal in magnitude and opposite in direction to the force exerted by the car.

This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. As the car pulls forward, it exerts a force on the chain, and in turn, the chain exerts an equal and opposite force on the car.

This force of tension in the chain is responsible for maintaining the car's constant velocity and preventing it from accelerating or decelerating.

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A 500. Kg car is driving with a speed of 4.00 m/s, the momentum of car is 2000 kg.m/sec

Momentum is characterized as the intensity of a body's motion. As momentum relies on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Because velocity is a vector, momentum is a also a vector quantity, whereas mass is a scalar number.

Given that,

mass of car (m) = 500 kg

velocity of car (v) = 4.00 m/sec

Thus, momentum (p) = m × v

p = 500 kg × 4.00 m/sec

p = 2000 kg.m/sec

Thus, momentum of car is 2000 kg.m/sec

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To find the current in the resistor, we can use Ohm's Law and the concept of equivalent resistance. Thus, option A is correct.

First, let's calculate the equivalent resistance of the three cells connected in parallel. When resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of the individual resistances:

1/Req = 1/R1 + 1/R2 + 1/R3

Given that R1 = R2 = R3 = 22 Ω (internal resistance of each cell), we can substitute the values:

1/Req = 1/22 + 1/22 + 1/22

1/Req = 3/22

Taking the reciprocal of both sides, we find:

Req = 22/3 Ω

Now we can use Ohm's Law to calculate the current (I) in the resistor. Ohm's Law states that the current flowing through a resistor is equal to the voltage across it divided by its resistance:

I = V/R

Given that V = 1.1 V (emf of each cell) and R = 32 Ω (resistance), we can substitute the values:

I = 1.1/32

Calculating this value, we find:

I ≈ 0.034375 A

Therefore, the current in the resistor is approximately 0.034375 A.

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Answer:

0.7kg

Explanation:

Given parameters:

Force on the rock  = 8.68N

Acceleration  = 12.4m/s²

Unknown:

Mass of the rock  = ?

Solution:

From newton's second law of motion, the net force on a body is the product of mass and acceleration

  Net force  = mass x acceleration

Now insert the parameters and solve the problem;

         8.68  = mass x 12.4

          mass = \(\frac{8.68}{12.4}\)  = 0.7kg

The dog MUST be SEEN by a vet.

Not on the phone, not from your description. Not a web search, and not asking for advice online.

A qualified veterinarian has to have his hands on the animal, examine the dog, and make some suggestions. It might cost some money.

There's something missing here. A qualified real vet will never just say "I don't know, good bye!".

Answer: 31N

Explanation:F = m x a

F = 8.5 x 3.7

F = 31.45

F = 31 (rounded)

F = 31 N

The gravity inside the black hole is much greater and hence, no force can overcome it and the spaceship was completely collapsed.

A black hole is a region in space where gravitational force is much stronger, that attracts all the objects even light couldn't escape from it. The general theory of relativity predicts the presence of a black hole. The black hole is formed by the collapse of massive stars. It is also formed by the gradual accretion of mass of millions or billions of stars.

The black hole has two important parts and they are an event horizon and singularity. The event horizon is the outer layer of the black hole and the singularity is at the center of the black hole and it has high gravitational force.

When we rode in a spaceship from space all the way down the surface of a black hole that is an event horizon, the spaceship will attract due to high gravitational force and it will be collapsed and vanished away from the universe. Hence, no force or mechanical force can overcome it.

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Answer:

Explanation:

The kinetic energy of the car can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the Mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 1200 \times {5.5}^{2} \\ = 600 \times 30.25\)

We have the final answer as

Hope this helps you