Vocabulary: electron volt, frequency, photoelectric effect, photon, photon flux, voltage, wavelength, work function Prior Knowledge Questions (Do these BEFORE using the Gizmo. ) 1. Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen? 2. Suppose you rolled a lot of ping pong balls at the bowling pins. Do you think that would change the results of your experiment? Explain. Gizmo Warm-up The photoelectric effect occurs when tiny packets of light, called photons, knock electrons away from a metal surface. Only photons with enough energy are able to dislodge electrons. In the Photoelectric Effect Gizmo, check that the Wavelength is 500 nm, the Photon flux is 5 γ/ms, the Voltage is 0. 0 volts, and Potassium is selected. Click Flash the light to send photons of light (green arrows) toward a metal plate encased in a vacuum tube. 1. The blue dots on the metal plate are electrons. What happens when the photons hit the electrons? 2. What happens when the electrons reach the light bulb? _________________________________________________________________________ When electrons reach the light bulb they complete a circuit, causing the bulb to glow briefly

The melting point of a substance is the temperature at which the substance changes its phase from solid to liquid.

The freezing point is the temperature at which the substance changes its phase from liquid to solid.

The melting point of a substance is the same as the freezing point. That is when the temperature of the substance in the liquid form is increased continuously, the temperature at which the substance turns into a solid is equal to the temperature at which the substance will turn into liquid from solid if the temperature is decreased continuously, from a higher temperature.

The term refers to how loud or soft a sound will be wavelength. Then the correct option is A.

In physics, math, and related fields, a wave is a dynamic disturbance of one or more variables that spreads. Waves are referred to as periodic when they oscillate repeatedly around an equilibrium value at a specific frequency.

The wave can be represented as,

f(x) = A sin (ωt + ∅)

Where 'A' is the amplitude, 'ω' is the frequency, 't' is the time period, and '∅' is the phase difference.

Depending on the medium that it is moving through, sound has a wide range of speeds. The stiffness of the medium (or compressibility in the case of gases) and its density work together to define the speed of sound in that medium. The speed of sound increases with the rigidity (or lack of compressibility) of the medium.

If the amplitude is high then the voice is loud. Similarly, if the amplitude is low then the voice is soft.

The wave

The phrase describes a sound's wavelength, or how loud or soft it will be. Then, choice A is the best one.

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Answer:

The Bohr atom The Rutherford–Bohr model of the hydrogen atom. In this view, electron orbits around the nucleus resemble that of planets around the sun in the solar system.

Given

The electric flux is

Radius of the sphere,

To find

a. The flux through a gaussian sphere with radius of 29.0 cm.

b. The magnitude of the charge

Explanation

a. Since the gaussian sphere covers the same charge so the electric flux through both the sphere will be same.

Thus the required flux is

b.

The magnitude of the charge is

Conclusion

a. The flux is

b. The charge is

Answer:

B

explanation:

I think B is right hope it will be help

A "morpheme" is the smallest important piece of language, like the "ed" in the word "walked."

A morpheme is the smallest piece of grammar that has sense in a language. It can be a whole word, like "walk," or just a part, like the "-ed" at the end of "walked."

There are two main types of morphemes: free morphemes and fixed morphemes. Free morphemes can stand on their own as words with their own meanings, like "walk." Bound morphemes, on the other hand, can't work on their own. Instead, they need to be added to other morphemes to make sense, like the "-ed" ending in "walked."

In the case of "ed," it is a bound morpheme because it cannot stand alone as a word. Instead, it must be added to a base form to show the past tense. In this case, it means that the action happened in the past.

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From the information given, the jar contains 8 red marbles and 12 blue marble. The marbles are

Red = 1, 2, 3, 4, 5, 6, 7, 8

Blue = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Probability = number of favorable outcomes/number of total outcomes

number of total outcomes = 8 + 12 = 20

a) number of red marbles = 8

the probability that the marble is red, P(red)= 8/20

Dividing the numerator and denominator by 4,

P(red) = 2/5

b)odd-numbered marbles are

Red = 1, 3, 5, 7

Blue = 1, 3, 5, 7, 9, 11

number of odd-numbered marbles = 10

P(odd) = 10/20

Dividing the numerator and denominator by 10,

P(odd) = 1/2

c) The events can occur together. This means that they are not mutually exclusive. Thus,

P(red or odd) = P(red) + P(odd) - P(red and odd)

P(red and odd) = 4/20

P(red or odd) = 2/5 + 1/2 - 4/20

P(red or odd) = 14/20

Dividing the numerator and denominator by 2,

P(red or odd) = 7/10

d) P(blue or even) = P(blue) + P(even) - P(blue and even)

P(blue) = 12/20

P(even) = 1 - P(odd) = 1 - 1/2 = 1/2

P(blue and even) = 6/20

P(blue or even) = 12/20 + 1/2 - 6/20

P(blue or even) = 16/20

Dividing the numerator and denominator by 4,

P(blue or even) = 4/5

The roller-coaster has a speed of 47.7 m/s at point B. To bring the roller-coaster to a stop at point D, an average force of  10,784 N is required.

We can use conservation of energy to solve this problem. At Point A, the roller-coaster has gravitational potential energy, which is converted into kinetic energy as it moves down the track. At Point C, the roller-coaster has only kinetic energy, which is converted into thermal energy as it comes to a stop at Point D.

The initial potential energy at Point A is given by

PE = mgh = 850 kg * 9.81 m/s² * 140 m = 1,106,460 J

At Point B, the roller-coaster has lost some potential energy and gained an equal amount of kinetic energy. Using conservation of energy, we can find the kinetic energy and then the velocity

PE(A) = KE(B)

1,106,460 J = (1/2) * 850 kg * v²

v = √(2 * 1,106,460 J / 850 kg) = 47.7 m/s

The roller-coaster then travels along the straight track from Point C to Point D. During this time, it experiences a net force that slows it down. We can use the work-energy principle to find the average force required to bring it to a stop

Work done by brakes = change in kinetic energy

F_avg * d = (1/2) * m * v²

F_avg = (1/2) * m * v² / d

where d is the distance from Point C to Point D, which is 120 m.

The final velocity at Point C can be found by equating its potential energy at Point D to its kinetic energy

PE(D) = (1/2) * m * v_f²

1,106,460 J - (850 kg * 9.81 m/s² * 80 m) = (1/2) * 850 kg * v_f²

v_f = √(2 * (1,106,460 J - 850 kg * 9.81 m/s² * 80 m) / 850 kg) = 36.6 m/s

Substituting the values, we get

F_avg = (1/2) * 850 kg * (47.7 m/s)² / 120 m = 10,784 N (approximately)

Therefore, the roller-coaster is moving at 47.7 m/s at Point B, and an average force of 10,784 N is required to bring it to a stop at Point D.

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--The given question is incomplete, the complete question is given

"  An 850 kg roller-coaster is released from rest at Point A of the track is one wave and straight path. Assume there is no friction or air resistance between Points A and C. How fast is the roller-coaster moving at Point B? What average force is required to bring the roller-coaster to a stop at Point D if the brakes are applied at Point C? A is starting point at 140 m height from horizontal base, B s the point on wave at height 95m, C is starting point of straight line in track CD is 120 m, D is the final point on height 80 m"--

Explanation:

the switch and the battery

After 1 day has passed, approximately 6.25% of Element Z would be remaining.

The half-life of an element is the time it takes for half of the initial amount of the element to decay or transform into another element or isotopes. In this case, Element Z has a half-life of 5 hours.

To determine the percentage of Element Z remaining after 1 day (24 hours), we need to calculate the number of half-lives that have occurred.

Since the half-life of Element Z is 5 hours, there are 24 hours divided by 5 hours, which equals 4.8 half-lives.

Each half-life reduces the amount of Element Z by half. So, after 4.8 half-lives, the remaining amount of Element Z would be (1/2)^(4.8) = approximately 0.0625 or 6.25%.

Therefore, after 1 day has passed, approximately 6.25% of Element Z would be remaining.

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Answer:

8x + 7y = 21

Explanation:

-8/7x + 3 in slope intercept form is 8x + 7y

Graph in pic

Answer:

2.5m/s²

Explanation:

a = v/t

Where;

V = velocity (m/s)

a = acceleration (m/s²)

t = time (s).

According to the information provided in this question,

a = ?

v = 10m/s

t = 4

a = 10/4

a = 2.5m/s²

Sort the mass m required to prevent the board from toppling over from largest to smallest. Overlap items to rank them equally. Disregard the board's bulk. Sort the mass m required to prevent the board from toppling over from largest to smallest. Sort the required mass to prevent the board from toppling over from largest.

What is torque?
When an engine exerts itself, torque, which is a twisting force, speaks to the rotational force of the engine and quantifies how much of twisting force is available. Everyday activities like turning a doorknob, opening a soda bottle, and use a wrench, or peddling a bicycle all involve torque.

Overlap items to rank them equally. Due to its angular momentum, the earth revolves around the sun. If the earth were to be stopped in its orbit and then allowed to fall directly toward the sun. I received a ton of information regarding the of the sun and earth from the questioner.

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Frost wedging is a type of physical weathering of rock.

Explanation:

Physical or mechanical weathering affects the rock structurally but does not change the chemical composition. Mechanical forces will rub, break or shatter the rock surfaces. Wedging, abrasion, exfoliation are different types of physical weathering.

Water is one of the main sources which alter the structure of the rocks physically.

Frost wedging occurring due to flow of freezing water over the rocks. This frozen water enters the rock through the cracks and crevices on the rock surface,  and will expand inside and makes the rocks to crack further and breaks it apart.

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Mechanical advantage is a measure of the ratio of the output force produced to the input force applied in a system, mainly in the case of simple machines, such as levers and pulleys. It is a dimensionless quantity.

From the definition, the mechanical advantage of a simple machine is inversely proportional to the input force applied on the system. So, an increase in this force decreases the mechanical advantage of a simple machine.

For example, the mechanical advantage of a lever can be decreased by increasing the force on load arm or by reducing the force on the effort arm.

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It should be noted that after the big bang occurred, the universe "Became Denser" (Option B)

According to the Big Bang Theory, after the explosion which triggered the transformation of radiation into matter, gravity pulled dark matter together which in turn attracted normal matter.

Hence, it is right given the above analogy that the Universe became denser.

It should be mentioned that the big-bang hypothesis is a widely accepted account of the universe's evolution. Its defining characteristic is the universe's birth from a condition of great heat and density—the so-called big bang, which occurred 13.8 billion years ago.

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Using the elements of the systems perspective, synergy can be thought of as a transformative process. Hence, option b) aligns well with the answer.

Synergy occurs when the integration of different parts of a system results in a whole that is more effective than the sum of its parts. This principle is based on the idea that a system's output is determined by how its individual elements interact with one another. As a result, a systems perspective can aid in the understanding of the causes and consequences of synergistic interactions.

Synergy refers to the phenomenon in which the combined efforts of elements result in a more powerful and effective outcome than they would have achieved individually.

For example, consider a team of employees working together on a project. The group's output may be greater than the sum of each individual's output. This is because each person has unique talents, perspectives, and experiences that they bring to the table.

When these elements are combined in a synergistic manner, the team can achieve results that no individual could have achieved on their own.The transformative process of synergy has many potential benefits. Synergy can lead to innovation, increased productivity, and improved decision-making.

Synergistic systems can be highly resilient, as they are often able to adapt to changing circumstances and maintain stability in the face of disruption. Additionally, synergistic systems are often more efficient, as they minimize duplication of effort and resources.

Finally, the systems perspective on synergy highlights the interconnectedness of the elements within a system. This interconnectedness emphasizes the importance of a holistic approach to problem-solving. Rather than focusing solely on individual components of a system, a systems perspective considers the relationships between those components.

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Answer:

a

Explanation:

The radial acceleration of the ball during its circular motion is approximately 59.4 m/s^2.

Centripetal acceleration, a = v^2 / r, where v is the speed of the ball and r is the radius of the circle.

The time it takes for the ball to reach the ground,

y = 1/2 g t^2

where y is the initial height of the ball (1.00 m), g is the acceleration due to gravity (9.81 m/s^2), and t is the time it takes for the ball to reach the ground.

t = sqrt(2y/g)

= sqrt(2 x 1.00 / 9.81)

≈ 0.45 s

Velocity, v = x/t

= 1.90 / 0.45

≈ 4.22 m/s

The radial acceleration of the ball during its circular motion can now be found using the equation,

a = v^2 / r

a = v^2 / r = (4.22)^2 / 0.300 ≈ 59.4 m/s^2

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When a beam of electrons is directed into the electric field between two oppositely charged parallel plates, the electrostatic force exerted on the electrons is directed in the opposite direction to the direction of the electric field. This is because electrons have a negative charge and are attracted to the positively charged plate while being repelled by the negatively charged plate.

The strength of the electrostatic force on the electrons is determined by the magnitude of the electric field and the charge of the electrons. If the electric field is strong, the force on the electrons will be greater, causing them to accelerate towards the oppositely charged plate. However, if the electric field is weak, the force on the electrons will be smaller, resulting in slower acceleration.

It's important to note that the motion of the electrons is not affected by the motion of the charged plates. Even if the plates are moving, the electrostatic force on the electrons remains the same. This is because the force is determined solely by the electric field, which is determined by the positions of the charges.

In conclusion, when a beam of electrons is directed into an electric field between two oppositely charged parallel plates, the electrostatic force exerted on the electrons is directed oppositely to the direction of the electric field, causing them to accelerate towards the positively charged plate.

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Using the given values of N, emf 0, and w, we get: AB = (110 V)/(23120 rad/s0.890 T) = 0.00505 m^2.Therefore, the area of the loop needed is 0.00505 m^2.

The emf induced in a rotating current loop in a uniform magnetic field is given by the equation: emf = NABw sin(wt), where N is the number of turns, A is the area of the loop, B is the magnetic field strength, w is the angular velocity, and t is the time.To produce an emf of the form emf = emf0 sin(wt) with emf0 = 110 V and w = 120 rad/s, we need to choose N, A, and B such that emf = emf0 sin(wt).Substituting the given values into the equation for emf, we get: emf0 sin(wt) = NABw sin(wt), which simplifies to: AB = emf0/(NBw).Using the given values of N, emf0, and w, we get: AB = (110 V)/(23120 rad/s0.890 T) = 0.00505 m^2.Therefore, the area of the loop needed is 0.00505 m^2.

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The change in the momentum of the ball can be found using the following formula:

Change in momentum = final momentum - initial momentum.

We know that the mass of the handball, m = 0.25 kg.

Also, the initial velocity, u = 24 m/s, and the final velocity, v = 17 m/s. Here, the final velocity is in the opposite direction to that of the initial velocity since the ball rebounded after striking the wall. Hence, the final velocity will be taken with a negative sign.

Substituting the values in the formula: Initial momentum = mu and Final momentum = mv

Change in momentum = mv - mu= m(v - u)

Change in momentum = 0.25 kg × (-17 m/s - 24 m/s)Change in momentum = -10.25kg⋅m/s.

Therefore, the change in the momentum of the handball is -10.25kg⋅m/s.

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Eating less red meat so fewer cattle need to be raised would help reduce global warming.

The production of red meat, particularly beef, is a major contributor to greenhouse gas emissions. Cattle produce methane, a potent greenhouse gas, and the production of feed for cattle also requires large amounts of energy, water and land. Additionally, the clearing of forests for grazing land and feed production also contributes to carbon emissions.

Riding a bicycle rather than walking to school would also help reduce global warming because it would decrease the amount of CO2 emissions produced by cars and other vehicles.

Clearing more forests to produce more farmland and using more fertilizers to increase crop production would not help to reduce global warming, as the clearing of forests causes a release of stored carbon into the atmosphere and the use of fertilizers and pesticides also has an environmental impact.

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Answer:

a =45 m/s2

t = 2 seconds

Explanation:

Hi, to answer this question we have to apply the next formula:

v^2 = u^2 +2 a d

Where:

v = final velocity = 90 m/s

u = initial velocity = 0 m/s (shots from rest)

a = acceleration (m/s2)

d = distance = 90m

90^2 = 0^2 + 2a(90)

Solving for a:

8,100= 180 a

8,100/180 = a

a = 45 m/s^2

For time:

v = u + at

90 = 0 + 45t

90/45=t

t =2 seconds

The magnitude of the force required is 104 Newtons (N).

To calculate magnitude of the force required, we can use Newton's second law of motion, which states that force (F) equals mass (m) multiplied by acceleration (a).

In this case, the given inertia is the mass (m = 65 kg) and the acceleration (a) is 1.6 m/s².

By substituting the values into the equation, we find:

\(Force (F) = mass (m) * acceleration (a) \\F = 65 kg * 1.6 m/s\²\\F = 104 N\)

Therefore, the magnitude of the force required to accelerate upward at 1.6 m/s² with an inertia of 65 kg is 104 N.

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The given statement "A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package" is true.

What is large bulk quantity?

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