what is the maximum kinetic energy electron of electrons ejected from this metal by light with a wavelength of 285 nm?

A child pulls a rope attached to a 72.1kg sled up a 5.73o incline. The coefficient of friction between the sled and the hill is approximately 0.138.

To find the coefficient of friction between the sled and the hill, we can start by calculating the gravitational force acting on the sled

Fg = mg = (72.1 kg)(9.81 m/\(s^{2}\)) = 707.3 N

Next, we can break down the forces acting on the sled along the incline and perpendicular to it

Parallel to the incline: Tension force and friction force

Perpendicular to the incline: Normal force and gravitational force

Since the sled is accelerating up the incline, we can write the following equations of motion

Along the incline: T - f = ma

Perpendicular to the incline: N - Fg = 0

Where T is the tension force, f is the friction force, N is the normal force, and a is the acceleration of the sled.

We can use the second equation to solve for the normal force

N = Fg = (72.1 kg)(9.81 mm/\(s^{2}\)) = 707.3 N

Now we can substitute this into the first equation and solve for the coefficient of friction

T - f = ma

f = μN

T - μN = ma

μ = (T - ma) / N

μ = (233.0 N - (72.1 kg)(2.2 m/\(s^{2}\))) / (707.3 N)

μ ≈ 0.138

Therefore, the coefficient of friction between the sled and the hill is approximately 0.138.

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Answer:

You subtract the atomic number from the atomic mass to find the number of neutrons alone

Explanation:

The atomic number is the number of protons OR electrons. They are both equal thus making the atom have a neutral charge. The relative atomic mass is the number of protons AND neutrons.

Answer:

1080 meters

Explanation:

60sec in 1 minute

So, 3x60=180

So, 6x180=1080 meters

Clean air refers to air that is free from harmful levels of pollutants, various sources of air pollution such as volcanic eruptions and industrial emissions, their impacts on human health is leading to respiratory issues, and control air pollution by improving fuel quality.

Ensuring a healthy environment for humans and other living organisms. Air pollution, on the other hand, involves the presence of substances in the atmosphere that have detrimental effects on human health and the environment. There are various sources of air pollution, which can be broadly categorized into natural sources and human-made sources. Natural sources include volcanic eruptions, wildfires, and dust storms. Human-made sources consist of industrial emissions, vehicular exhaust, and the burning of fossil fuels.

Air pollution can be classified into two types 1. primary pollutants are emitted directly from sources, such as sulfur dioxide from industrial processes or carbon monoxide from vehicle exhaust. 2. Secondary pollutants form when primary pollutants undergo chemical reactions in the atmosphere, like ground-level ozone formed from nitrogen oxides and volatile organic compounds. Air pollution has significant impacts on human health, leading to respiratory issues, heart disease, and even premature death. Particulate matter can penetrate deep into the lungs, while ground-level ozone can aggravate existing respiratory conditions.

To control air pollution, various strategies can be implemented, such as improving fuel quality, promoting cleaner transportation methods like electric vehicles, and implementing stricter emission regulations for industries. Encouraging the use of renewable energy sources and raising public awareness on the importance of clean air can also contribute to reducing air pollution levels.

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When he is wearing glasses to correct his distant vision, his near point is  -6.67 diopters. When the nearsighted person is wearing glasses to correct his distant vision, his near point is 64 cm. Answer choice (a) is the correct option.

A nearsighted person has difficulty seeing distant objects clearly, but can see nearby objects without any problem. The near point is the closest distance at which an object can be brought into focus. The far point is the farthest distance at which an object can be seen clearly without any visual aid.

To correct nearsightedness, a diverging lens is used to diverge the incoming light rays before they enter the eye, so that the image is formed at the correct position on the retina.

We can use the lens formula to calculate the power of the lens required to correct the nearsightedness:

1/f = 1/v - 1/u,

where f is the focal length of the lens, v is the distance of the image from the lens, and u is the distance of the object from the lens.

When the person is wearing glasses to correct his distant vision, the image of a distant object is formed at infinity. Therefore, v = infinity, and the lens formula becomes:

1/f = 0 - 1/u

f = -u

The power of the lens required to correct the person's nearsightedness is therefore given by the equation:

P = 1/f = -1/u

We can use this equation to calculate the power of the lens required to bring the near point of the person into focus:

P = -1/0.15 = -6.67 diopters

When the person is wearing glasses to correct his distant vision, the power of the lens required is -6.67 diopters.

To find the near point when wearing the glasses, we can use the formula:

1/f = 1/v - 1/u

where v is the distance at which the person can see clearly with the glasses. We want to find the value of u, the distance of the near point when wearing the glasses.

Since the person can see clearly at a distance of 50 cm, we have:

1/f = 1/∞ - 1/50

Simplifying this expression, we get:

1/f = 0 - 0.02

f = -50 diopters

Now, we can use the formula for the power of the lens:

P = 1/f = -1/50 = -0.02 diopters

The power of the lens required to correct the person's nearsightedness when wearing glasses is -0.02 diopters.

Finally, we can use the formula for the near point:

1/f = 1/v - 1/u

with v = 50 cm and f = -0.02 diopters, to find the value of u:

1/(-0.02) = 1/50 - 1/u

Solving for u, we get:

u = 64 cm

Therefore, when the nearsighted person is wearing glasses to correct his distant vision, his near point is 64 cm. Answer choice (a) is the correct option.

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Answer:

C. Wedge

Explanation:

Answer:

GIVE THE PERSON ABOVE BRAINLIEST UwU

Explanation:

The answers for question numbers 3 and 4 is correct. For question number 9, the average speed is 2.5 mi /hr and for question number 10 the speed is 5 yards / s.

We know that,

v = d / t

where,

v = Speed

d = Distance

t = Time

1 ) v = 360 / 6 = 60 km / h

2 ) v = 120 / 3 = 40 mi / h

3 ) v = 18 / 6 = 3 m / s

4 ) v = 1000 / 20 = 50 m / min

5 ) t = 6pm - 5 pm = 1 hr

    v = 2.5 / 1 = 2.5 mi / hr

6 ) v = 1.5 / 0.33 = 4.5 mi / hr ( Since 20 min = 20 / 60 = 0.33 hr )

   d = 4.5 * 1 = 4.5 mi

7 ) d = 20 * 1 = 20 mi ( Since 60 min = 1 hr )

8 ) d = 60 * 2 = 120 mi

9 ) Distance per lap = 0.5 mi

     Total laps = 10

     Total distance = 10 * 0.5 = 5 mi

     v = 5 / 2 = 2.5 mi / hr

10 ) v = 100 / 20 = 5 yards / s

Therefore, the answer for:

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Relation can you state about the acceleration of the charge and it mass is they are inversely proportional .

According to the question

Newton's second law :

Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.

F = m * a

a = \(\frac{F}{m}\)  

Relation can you state about the acceleration of the charge and it mass is

According to Newton's second law of motion, acceleration is inversely proportional to the mass when the force is a constant.

The acceleration is directly proportional to the force when the mass remains constant.

Hence, Relation can you state about the acceleration of the charge and it mass is they are inversely proportional .

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Answer:

Car D

Explanation:

Answer:

The corect answer is car D hope this helped (:

Explanation:

Answer:

spoon and scissors belong to first class lever.

hope it is helpful to you

W= mg × d × cosx

W= 12 × 10 × 2.2 × (-1)= -264 J

I hope it helps you

please mark brainliest ♡

Answer:

25000 N

Explanation:

\(force \: = pressure \times area \\ = 50000 \times 0.5 \\ = 5000 \times 5 \\ = 25000 \: N\)

Total resistance in series is 6715 ohm and in parallel is approximately 107 ohm.

How resistance in series and parallel have different values?

(a) The resistance of a 115 ohm, a 2.50 Kohm, and a 4.10 Kohm resistor connected in series can be calculated using the formula for resistors in series: R_total = R1 + R2 + R3.

So, the total resistance in series is 6715 ohm.

(b) The resistance of a 115 ohm, a 2.50 Kohm, and a 4.10 Kohm resistor connected in parallel can be calculated using the formula for resistors in parallel: 1/R_total = 1/R1 + 1/R2 + 1/R3.

Convert Kohm to ohm: 2.50 Kohm = 2500 ohm, and 4.10 Kohm = 4100 ohm.

So, the total resistance in parallel is approximately 107 ohm.

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The mixture of solids that can be separated by using both shape and size is oval beads, marbles, and dice (option B).

A mixture in chemistry is any substance that is made up of two or more constituents that can easily be separated using physical means.

Mixtures, unlike compounds, contain substances that retain their chemical composition since there is no chemical bonding.

This makes the components of a mixture separable by physical techniques such as heating, magnetism etc.

Therefore, the mixture of solids that can be separated by using both shape and size is oval beads, marbles, and dice because they are all of different and unique shapes and sizes.

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The velocity of Jay after five minutes is 1 Km/min. The greatest speed occurred at 45 mins.

The velocity time graph is a representation of the movement of a body a body from one point to another. It is the plot of the velocity on the vertical axis against the time on the horizontal axis. Ideally this graph would be divided into three portions;

We can be able to read off from the graph, the instantaneous velocity of the object at any time. This could be done by tracing the time against the velocity axis and extrapolating according from the graph as shown.

Recall that the acceleration of the body is obtained as the slope of the velocity time graph at any point and the acceleration could be uniform or non uniform as judged from the velocity time graph.

Having said all these, it is clear that the velocity of Jay after five minutes is 1 Km/min.

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The mass of a ball is 3.5 kg. It moves down a slope that is inclined at 40 degrees with respect to the horizontal. The base of the slope has a length of 4.8 meters.the ball loses 106.2 Joules of gravitational potential energy when it rolls down the slope.

It is required to determine how much gravitational potential energy the ball loses when it rolls down the slope.For this, we need to use the following formula:ΔPE = mghwhere m = mass of the ball = 3.5 kgg = acceleration due to gravity = 9.81 m/s2h = height from which the ball rolls downLet's analyze the situation. The ball moves down a slope. The potential energy (PE) of the ball at the top of the slope is converted into kinetic energy (KE) as it moves down the slope. The ball gains KE, and it loses PE.The height from which the ball rolls down the slope is given by the following expression:h = length of slope × sin θh = 4.8 × sin 40°h = 3.086 metersSubstitute the given values into the formula for ΔPE.ΔPE = mghΔPE = 3.5 × 9.81 × 3.086ΔPE = 106.2 JoulesTherefore, the ball loses 106.2 Joules of gravitational potential energy when it rolls down the slope.

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Answer:

There are many well-known figures in the history of ethics, including the Greek philosophers Plato and Aristotle. Since the mid-20th century, Aristotle's ethics has inspired the field of virtue theory, an approach to ethics that emphasizes human well-being and the development of character.

Explanation:

Hope this helps:) Goodluck!

Answer:

P = 22 watts

Explanation:

Given that,

The output power of the generator = 2 a

The output potential difference = 11 V

We need to find the output power of the generator. The formula for the output power is given by :

\(P=V\times I\\\\P=11\times 2\\\\P=22\ W\)

So, the output power of the generator is equal to 22 Watts.

Answer:

The correct answer is option an explanation inspires new questions and the process of making new observations

Explanation:

New things are being discovered and invented in a scientific field due to the "skeptical nature of humans" that is asking the questions.

The basis of scientific revolution is that a new question can be derived from the explanation of the earlier answered scientific hypothesis as the explanations consists of the data obtained after the assumptions, observations and related experiments. This generates new ideas of 'if and but conditions" in the mind which leads to the formation of a new hypothesis thus continuing the cycle of a a scientific research.

A focal ray from an object, after passing through a converging lens, proceeds in the following direction:a) The ray passes through the focal point F .

A converging lens, also known as a convex lens, focuses incoming parallel rays towards a single point known as the focal point. When a focal ray, which is a ray parallel to the principal axis, enters the converging lens, it refracts in such a way that it passes through the focal point (F) on the other side of the lens.This behavior is due to the lens's shape, which causes the light to bend as it passes through. The focal length, the distance from the lens to the focal point, is an important parameter for determining the behavior of a converging lens. In summary, a focal ray from an object, after passing through a converging lens, proceeds in the direction of the focal point F.

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Answer:

The answer to this is D two of the above

Answer: Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the greater the frequency of the waves. The SI unit for wave frequency is the hertz ( Hz ), where 1 hertz equals 1 wave passing a fixed point in 1 second.

Explanation:

Explanation:

The kinetic energy is basically the energy possesses by virtue of a body's motion

1. The truck moving to the quarry

let the mass be x

and the velocity is given as 20m/s

we know that the kinetic energy is given as

KE=1/2mv^2

KE=1/2(x)*20^2

KE=1/2(x)400

KE=200x

2. The truck leaving to the quarry

let the mass be 2x

and the velocity is given as 20m/s

we know that the kinetic energy is given as

KE=1/2mv^2

KE=1/2(2x)*20^2

KE=1/2(2x)400

KE=400x

From the analysis the kinetic energy is a function of mass, doubling the mass doubles the kinetic energy

Answer:

D

Explanation:

The tectonic plates move on the mantle, sort of floating on it as they are part of the crust. When they collide things like mountain ranges form, and big earthquakes happen.

The "d" in "Scd" signifies a small bulge, while the "c" indicates a relatively loose and poorly defined spiral pattern.

In Hubble's classification system, the type of galaxy that has a small bulge and a loose, widely spread, and poorly defined spiral pattern is classified as a "Scd" galaxy.

Hubble's classification scheme categorizes galaxies into different types based on their visual appearance, particularly the structure of their spiral arms, the size of their central bulge, and the overall shape of the galaxy. The scheme ranges from elliptical galaxies (labeled E) to spiral galaxies (labeled S), with further subdivisions denoted by additional letters and numbers.

Within the spiral galaxy category, the classification progresses from tightly wound and well-defined spiral arms (Sa type) to intermediate spiral arms (Sb type) and finally to loosely wound and poorly defined spiral arms (Sc type). The "d" in "Scd" signifies a small bulge, while the "c" indicates a relatively loose and poorly defined spiral pattern.

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Answer: There are five principles of fitness out of which two are overload principle and rest and recovery principle. Overload principle is one of the most important principle which tell that to gain and improve the fitness one should do the hard work.  

Slowly and gradually the intensity and time of exercise are increased so that our body can adapt to the hard work. Overload principle plays an important role in improving the skills and improving performance during exercise and sports.

Rest and recovery principle is important to relax the body and release the stress that happens due to intense training like in case of weight lifting one day rest should be taken to repair and rebuild the muscles. This allows the body to encounter the fatigue and improve performance.

Explanation:

In public health, the first level of leadership is typically at the managerial or supervisory level. This level of leadership is responsible for overseeing a specific department, program, or team within a public health organization or agency.

Individuals at this level may hold titles such as program manager, team leader, supervisor, or coordinator, depending on the specific structure and terminology used within the organization. They are responsible for managing the day-to-day operations, setting goals and objectives, coordinating activities, and ensuring that the work is carried out effectively and efficiently.

At this level, leaders often have direct oversight of staff members and are responsible for providing guidance, support, and mentorship to their team. They may also be involved in budgeting, resource allocation, and performance evaluation.

It's important to note that the specific organizational structure and titles may vary across different public health agencies and institutions. The level of leadership and corresponding titles can also differ depending on the size and complexity of the organization.

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Las diferencia de potencial indica el valor de la fuerza o potencial eléctrico entre dos puntos, lo cual permite llevar electricidad a diferentes areas.

La diferencia de potencial indica la fuerza ejercida por una corriente eléctrica entre dos puntos equidistantes.

La diferencia de potencial se mide en Volts, es decir, en voltaje (V), el cual indica la fuerza de la energía eléctrica que se puede transmitir entre dos puntos.

La diferencia de potencial nos permite tener energía en una vivienda o en una industria, como asi tambien usar un artefacto que requiera de electricidad para funcionar.

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Answer:

All you need is golfing equipment make a small hole in the ground and have like something to cover the sun off of you and boom you got a golfing spot and a golf club no skills needed. Oh and you need a small flag for your gold hole but then your good and you can have fun

Explanation: