Always use significant figure rules. Remember that these rules apply to all numbers that are measurements.

Calculate the potential drop across R2

Answer:

1. True

2. False

3. True

4. True

5. False

Answer:

a)5.925

ii)149.5 or383.5

Explanation:

ii)3.9×105-2.5×104

409.5-260

the zero in 260 may or may not be significant since it is after two significant figures thus we have two options

Answer: Force required to 25 joule work when the force causes a displacement of 0.5m is 50N

Explanation: To calculate the work done we use the formula

W=F.s                               (1)

W= work done

F=  force applied               s= displacement

Given, work done W= 25 joules= 25 J

displacement s= 0.5m

∴From equation (1) we get the force required when work is done and displacement is given, that is

F\(=\frac{W}{s}\)                                (2)

∴Force required \(F=\frac{W}{s}= \frac{25J}{0.5m}=50N\)            

(1 J is the work done by a force of 1 N acting over a displacement of 1 m and so 1 J= 1 Nm⇒ 1 N = 1 J/m)

ANS: Force required to do 25 J work when a force causes displacement of 0.5m = 50 N

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The statement "True or false solid or liquid particles suspended in the atmosphere; results from wind-blown dust from construction sites, etc..." is true.

True. Solid or liquid particles suspended in the atmosphere, commonly known as particulate matter or aerosols, can include dust particles from construction sites, industrial emissions, vehicle exhaust, and natural sources such as pollen and sea spray. These particles can be carried by wind and remain suspended in the air, contributing to air pollution and affecting air quality.

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Answer:

yes it is a reactant

Answer:

Answer is gonna be B. 2N

This is the Answer for your question :3

I hope you are having a great day ❤️❤️❤️❤️

The resultant force is indeed the single force and corresponding tension derived by vector addition when combining any system of torques acting on a solid body.

Therefore, the final answer is "Option b".

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Answer:

Substance A will release more heat.

Explanation:

Let suppose that both substances experiment an entirely sensible heat process and are incompressible and begin at the same temperature. Physically speaking, specific heat (\(c\)), measured in kilojoules per kilogram-degree Celsius, can be described by following expression:  

\(c = \frac{Q}{m\cdot (T_{f}-T_{o})}\) (1)

Where:

\(Q\) - Released heat, measured in kilojoules.

\(m\) - Sample mass, measured in kilograms.

\(T_{o}\), \(T_{f}\) - Initial and final temperatures of the sample, measured in degrees Celsius.

If we know that \(c_{A}> c_{B}\), \(m_{A} = m_{B}\), \(T_{A,o} = T_{B,o}\) and \(T_{A,f} = T_{B,f}\), then we have the following inequation:

\(\frac{Q_{A}}{m\cdot (T_{A,f}-T_{A,o})} > \frac{Q_{B}}{m\cdot (T_{B,f}-T_{B,o})}\)

\(Q_{A} > Q_{B}\)

Substance A will release more heat.

Answer: A. Cotton Pants

Explanation:

Answer:

A

Explanation:

Answer:

u go to vanguard? in 6th grade

Answer:

is it correct ? sorry of it is incorrec

Answer:

8.5 Ω

Explanation:

La resistencia de un material es directamente proporcional a su longitud e inversamente proporcional al área de la sección transversal.

La fórmula de la resistencia (R) viene dada por:

R = ρL/A

Donde ρ es la resistividad del material, L es la longitud del material y A es el área de la sección transversal del material.

Dado que:

L = 1 km = 1000 m, A = 2 mm² = 2 * 10⁻⁶ m², ρ (cobre) = 1.7 * 10⁻⁸ Ωm

Sustituyendo da:

R = 1,7 * 10⁻⁸ * 1000/2 * 10⁻⁶

R = 8.5 Ω

Answer:

F = 85.24 N

T = 30.84 N

Explanation:

The parameters given are

Mass of crates = m₁ = 3 kg and m₂ = 5 kg

Component of masses acting along the plane = mgsin(θ)

Which gives;

F - (3×9.81×sin(30) + 10 + 5×9.81×sin(30) + 17) = m×a

So that we have;

2 = (F - 66.24)(3 + 5)

F = 16 + 66.24 = 85.24 N

The tension T between the crates = F × m₁/(m₁+m₂) = 85.24 × 3/(3+5) = 30.84 N

Answer:

The answer is C. Series.

The coefficient of friction can be calculated by dividing the frictional force by the normal force acting on the block. The normal force can be determined by resolving the weight of the block into components parallel and perpendicular to the incline. At the angle where the box slides at a constant velocity, the force of friction will be equal in magnitude but opposite in direction to the component of the weight acting parallel to the incline.

First, calculate the normal force by finding the perpendicular component of the weight:

\(Normal force = Weight * cos(angle of incline)\).

\(Weight = mass * gravity\).

\(Weight = 2 kg * 9.8 m/s^2 = 19.6 N\).

\(Normal force = 19.6 N * cos(25) = 17.65 N\).

Next, calculate the coefficient of friction:

\(Coefficient of friction = Frictional force / Normal force\).

\(Coefficient of friction = 4.86 N / 17.65 N =0.275\).

Therefore, the coefficient of friction is approximately 0.275.

To determine the angle at which the block slides at a constant velocity, set the frictional force equal to the component of the weight acting parallel to the incline:

\(Frictional force = Weight * sin(angle of incline)\).

\(4.86 N = 19.6 N * sin(angle of incline)\).

\(sin(angle of incline) = 0.248\).

\(angle of incline=arcsin(0.248)\).

\(the angle of incline= 14.4\)°.

Therefore, the block will slide at a constant velocity when the incline is approximately 14.4 degrees.

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Answer:

...............................

He ran for 4,828.03 m when he does 9,656,060 J of work

Work done(W) is calculated as the dot product of Force(F) and displacement (s),

So, W = F.s

W = Fscosθ

Dr. Wu jogs and does about 9,656,060 J of work and his feet generate about 2000 N of force,

So, the angle between F and s is zero, and cos0 = 1.

Force = F =  2000N

And Work = W = 9,656,060 J

Now, W = Fs

So, s = W/F = 9,656,060/2000 = 4,828.03 m

Hence, He ran for 4,828.03 m

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Answer:

Energy transfer, I believe.

Explanation:

When the energy moves from one point to the other, this is known as energy transfer. Hence, option A is correct.

The capacity to perform work is known as energy in physics. Potential, kinematic, heat, electromagnetic, chemical, nuclear, and other different types are all possible. As energy is transferred of one body to another, there is also heat and work. Energy is always categorized after it has been transported based on its nature. As a result, heat transfer may result in thermal energy, while labor done may result in mechanical energy.

Motion is a common characteristic of all energy types. Whenever a body is in motion, for instance, it contains energy. Even when at rest, a tensioned object like a springs or bow has the ability to move; this is due to the structure of the object, which carries potential energy.

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Compressions are regions where particle of a material congregate more closely.

The Benchmark Model of Subatomic Particles is now thought to be the best theory to explain the universe's most fundamental constituents. It discusses how the building blocks of all known matter are quarks, who make up the protons and neutrons, and leptons, which contain electrons. Protons and electrons, two of the quantum particles, each have an electrical charge of one or the other.

Just several examples of particles are planets, carboxyl group, and electrons. Quarks and protons are fundamental particles. The fundamental particles, which are the tiniest, lowest massive particles, already represent the most stable.

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A chemical reaction took place absorbing thermal energy from the pack

Ligaments, which are tenacious bands of fibrous tissue that hold two bones together in your joints, can be stretched or torn during a sprain. An ankle sprain is the most typical type of injury. The first course of treatment entails rest, ice, compression, and elevation.

A direct or indirect injury (trauma) that misaligns the joint, overextends it, and occasionally tears the supporting ligaments results in a sprain. A sprain can result from various injuries, for instance: rolling your ankle while running, switching directions, or coming down from a jump

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The maximum wavelength of radiation emitted by the Sun is approximately 504 nm (in the visible light range, in the purple-blue region).

To calculate the surface temperature of the Sun, we can use the Stefan-Boltzmann law, which states that the total power output of a black body is proportional to the fourth power of its temperature.

The equation is:

P = σT^4

where P is the total power output, σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/(m^2·K^4)), and T is the temperature in Kelvin.

We can rearrange this equation to solve for T:

T = (P/σ)^(1/4)

So, using the given value for the total power output of the Sun (3.85 x 1026 W) and the value for the Stefan-Boltzmann constant:

T = (3.85 x 1026 W / (5.67 x 10^-8 W/(m^2·K^4)))^(1/4) = (6.8 x 1033)^(1/4) = 5.78 x 10^3 K

So, the surface temperature of the Sun is approximately 5780 K.

(b) To find the maximum wavelength of radiation emitted by the sun, we can use Wien's displacement law, which states that the maximum wavelength of radiation emitted by a black body is inversely proportional to the temperature of the black body.

The equation is:

λ_max = b/T

where λ_max is the maximum wavelength, b is Wien's constant (2.89 x 10-3 m·K) and T is the temperature in Kelvin.

So using the value for the temperature of the sun that we calculated previously and Wien's constant:

λ_max = 2.89 x 10-3 m·K / 5780 K = 0.000504 m = 504 nm.

So, the maximum wavelength of radiation emitted by the Sun is approximately 504 nm (in the visible light range, in the purple-blue region

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Answer:

decrease

Explanation:

As the wavelength of a wave increases, the frequency decrease.

As a wavelength increases in size, its frequency, and energy (E) decrease. From these equations, you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer. There are two basic types of waves: mechanical and electromagnetic.

Newton's first law, also known as the law of inertia, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

It implies that any object, either stationary or in motion, would remain as it is, unless an external force acts on it. When an external force is applied, it results in a change in motion in terms of direction, speed, or both. This is a statement that describes Newton's first law of motion.Basically, Newton's First Law of Motion states that a body at rest remains at rest and a body in motion maintains uniform motion in a straight line, unless acted upon by an external force.

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A. Decreased shell formation. pH is a measure of the acidity or basicity (alkalinity) of a solution. It is defined as the negative logarithm of the concentration of hydrogen ions (H+) in the solution.

A decrease in shell formation in marine organisms, such as corals and mollusks, can lead to an increase in carbon dioxide levels in the oceans. This is because these organisms help remove carbon dioxide from the water during shell formation, which helps to regulate the pH of the oceans. Without them, there will be an excess of carbon dioxide, leading to a decrease in pH levels, or ocean acidification. This process can have significant impacts on marine ecosystems and the organisms that depend on them.

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Answer:

Generators and transformers share similarities and differences in their use in electrical power systems. Both transfer energy, change voltage levels, and operate on electromagnetic induction. However, generators convert mechanical energy into electrical energy, produce a range of voltages and currents, and have a rotating component. Transformers transfer electrical energy from one circuit to another, can only change voltage and current levels, and have a stationary core with coils wound around it.

Average yearly high temperature decreases as elevation increases.

The difference in elevation between the two cities results in a difference in atmospheric pressure and thus a difference in temperature.

A decrease in latitude would likely increase the average yearly high temperatures of both cities due to the increased amount of solar radiation they receive.

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The magnitude of the linear acceleration of the falling bucket is 9.8 m/s^2. The magnitude of the linear acceleration of the falling bucket is equal to the acceleration due to gravity, which is 9.8 m/s^2.

A bucket with a mass of a kg is attached to a cylindrical, massive pulley with a radius of b m. The bucket starts from rest and falls for c s into a well. The tension in the rope is d N. To find the magnitude of the linear acceleration of the falling bucket, we can use the following equation:

F_net = ma

Where F_net is the net force acting on the bucket, m is the mass of the bucket, and a is the acceleration of the bucket.

We can find the net force acting on the bucket using the tension in the rope: F_net = T - mg, where T is the tension in the rope, and mg is the weight of the bucket. Since the bucket is falling, we know that a = -g (where g is the acceleration due to gravity, which is a constant -9.8 m/s^2). So we can set up the following equation: T - mg = maT - mg = m(-g)T = mg - mgT = m(-g)T = -mg

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Answer:

330 Hz

Explanation:

edg2020

The best estimate of the frequency Suzy hears after the car passes her is govern by doppler effect and it is 330 Hz.

Frequency is the number of occurrences of a repeating event per unit of time.

The Doppler effect is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.

According to the Doppler Effect, the frequency observed by an observer decreases for source going away.

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Part I:For Hunter and his wife, I would advise them to purchase health insurance, life insurance, and disability insurance.

Health insurance will cover their medical expenses in case of illness or injury, while life insurance will provide financial protection for their family in case of the unexpected death of one of the spouses.

Disability insurance will provide income replacement if either of them becomes unable to work due to an injury or illness.

On the other hand, I would advise against purchasing pet insurance, as it is not a critical expense and may not provide a significant financial benefit in the long run.

The reasoning behind this advice is to prioritize the essential insurance needs of Hunter and his wife while avoiding unnecessary expenses.

Health, life, and disability insurance provide critical protection against unforeseen events that could result in financial ruin. In contrast, pet insurance is optional and may not provide as much financial value as the other types of insurance.

Part II:
Hunter's insurance rate may be higher than his counterparts due to personal factors such as age, occupation, health status, and driving record.

For example, if Hunter is older, works in a high-risk job, has a history of medical conditions, or has a poor driving record, he may be considered a higher risk by insurance companies, and his insurance rates may be higher than those of someone without those risk factors.

Part III:
Factors that may allow Hunter to receive a discount on his insurance premiums include having a good credit score, being a non-smoker, having a clean driving record, and bundling multiple insurance policies with the same provider.

Additionally, if Hunter has installed safety features in his home or car, such as a security system or anti-lock brakes, he may be eligible for a discount. Finally, if Hunter maintains a healthy lifestyle, such as regular exercise and a balanced diet, he may be eligible for lower health insurance premiums.

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