Doc Brown holds on to the end of the minute hand of the clock atop city hall. The tangential velocity of the minute hand is 0.419 m/s. If the minute hand is
4.0 meters long, what is the professor's centripetal acceleration?

Answer:

B

Explanation:

One positive charger and one negative charger

A beam of blue light causes photoelectrons to be emitted from a photoemissive surface. An increase in the intensity of the blue light will cause an increase in the number of photoelectrons emitted. Therefore, an increase in the intensity of blue light will cause an increase in the light intensity.

What is light? Light is a type of electromagnetic radiation that travels in waves at a velocity of 299,792 kilometers per second (km/s) in a vacuum. It is a form of energy and, like all forms of energy, can be transferred. Light, like other electromagnetic waves, has both electric and magnetic fields that oscillate perpendicularly to one another at right angles.Light has a very important property, which is its intensity. The amount of light that passes through a given area or space per unit time is known as light intensity. It is the amount of light energy that falls on a unit area in a given time. The energy of light, like all energy, can be described in terms of photons.

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Answer:

B. 40m

Explanation:

The final speeds of the spheres are 3.47 m/s and 3.08 m/s.

We can use conservation of momentum to solve this problem since there are no external forces acting on the system.

The initial momentum of the system is:

p_initial = m₁ * v₁ + m₂ * v₂

where m₁ and m₂ are the masses of the spheres, and v₁ and v₂ are their initial velocities (4.00 m/s and 0 m/s, respectively).

After the collision, the momentum of the system is:

p_final = m₁ * v1' + m₂ * v₂'

where v₁' and v₂' are the final velocities of the spheres. We also know that the angle between the first sphere's final path and its initial path is 60 degrees, which means that the angle between the two spheres after the collision is 150 degrees (90 + 60).

Using conservation of momentum, we can set the initial and final momenta equal to each other:

m₁ * v₁ + m₂ * v₂ = m₁ * v₁' + m₂ * v₂'

We can also break down the final velocities into their x and y components using trigonometry. Let's define the angle between the first sphere's final path and the x-axis as theta. Now we can use conservation of momentum to solve for the final velocities:

m₁ * v₁ + m₂ * v₂ = m₁ * v₁' * cos(theta) + m₂ * v₂' * cos(150 degrees)

0 = m₁ * v₁' * sin(theta) + m₂ * v₂' * sin(150 degrees)

Solving the first equation for v₂', we get:

v₂' = (m₁ * v₁ + m₂ * v₂ - m₁ * v₁' * cos(theta)) / (m₂ * cos(150 degrees))

Substituting this expression into the second equation and solving for v₁', we get:

v₁' = (m₂ * sin(150 degrees) * v₁ + m₂ * sin(150 degrees) * v₂ + m₁ * sin(theta) * v₁' - m₁ * sin(theta) * m₂ * v₁ * cos(theta) / cos(150 degrees)) / (m₁ * sin(theta))

Plugging in the given values and solving, we get:

v₁' = 3.47 m/s

v₂' = 3.08 m/s

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Answer:

When a proton is placed directly in the path of the proton cannon, it will experience a strong electromagnetic force. The proton cannon emits a beam of protons at high energy and velocity. When the proton in the path of the cannon interacts with the beam, there will be a collision between the two protons.

During the collision, the protons may undergo a process called scattering, where they change direction and momentum. The exact outcome of the collision depends on the energy and angle of the incoming proton, as well as the properties of the target proton. It is possible that the protons may scatter off each other, transferring energy and momentum in the process.

In some cases, the collision may result in the absorption of the incoming proton by the target proton. This can lead to the formation of a more massive particle or the emission of other particles. The specifics of the interaction will depend on the energy and conditions of the proton cannon and the characteristics of the protons involved.

Overall, placing a proton directly in the path of a proton cannon will result in a collision and potential scattering or absorption of the protons, causing changes in their momentum and possibly leading to the creation of other particles.

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Inert gases require high temperatures and pressures to react with other elements.

A gas is considered to be inert if, under a specific set of circumstances, no chemical reactions occur. The noble gases, formerly known as the inert gases, frequently do not react with a wide variety of substances as argon and neon (at normal conditions).

Because they contain a fully filled valence shell and an electronic configuration of ns²np⁶, inert gases do not react with other chemicals.

As a result, they are referred to as noble gases and are in the periodic table's group 18.

But under  high temperatures and pressures Inert gases react with other elements.

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13.5 mol of vinyl chloride has a mass of 843.75 g, 13.5 mol of capsaicin has a mass of 4114.5 g, and 13.5 mol of stearic acid has a mass of 3833.25 g.

To calculate the mass in grams of a given number of moles of a substance, we can use the molar mass of the substance, which is the mass of one mole of the substance. The molar mass is calculated by adding the atomic masses of all the atoms in the molecule.

(a) The molar mass of vinyl chloride, C2H3Cl, is:

1 x 2 (C) + 3 x 1 (H) + 1 x 35.5 (Cl) = 62.5 g/mol

Therefore, 13.5 mol of vinyl chloride has a mass of:

13.5 mol x 62.5 g/mol = 843.75 g

(b) The molar mass of capsaicin, C18H27NO3, is:

18 x 12.01 (C) + 27 x 1.01 (H) + 1 x 14.01 (N) + 3 x 16.00 (O) = 305.4 g/mol

Therefore, 13.5 mol of capsaicin has a mass of:

13.5 mol x 305.4 g/mol = 4114.5 g

(c) The molar mass of stearic acid, C18H36O2, is:

18 x 12.01 (C) + 36 x 1.01 (H) + 2 x 16.00 (O) = 284.5 g/mol

Therefore, 13.5 mol of stearic acid has a mass of:

13.5 mol x 284.5 g/mol = 3833.25 g

In summary, 13.5 mol of vinyl chloride has a mass of 843.75 g, 13.5 mol of capsaicin has a mass of 4114.5 g, and 13.5 mol of stearic acid has a mass of 3833.25 g.

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Answer:

The answer is . A 46.2g

Potential energy is transformed into kinetic energy its correct trust me have a nice day! :)

The coefficient of friction is 0.5.

The ratio of friction force to normal force is known as the coefficient of friction (COF), which has no dimensions. Those materials are said to as lubricous if their COF is less than 0.1. Surface roughness and COF are dependent on the composition of the materials.

Initial velocity, u=30m/s

time taken = 6s

Final velocity, v=0

Acceleration of friction, a=μg=10μms⁻²

Apply first kinematic equation of motion,

v - u = at

0 - 30 = (-10μms⁻²) × 6

-30 = -60μ

μ = 1/2

μ = 0..5  

Hence, coefficient of friction is 0.5

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The angular speed of the wheels is approximately 403.47 rad/min, and the wheels make approximately 387.68 revolutions per minute (rpm).

To find the angular speed of the wheels in rad/min, we need to convert the linear speed of the truck to angular speed. The linear speed of the truck is given as 55 mi/h. We know that the distance traveled on the circumference of a circle is equal to the product of the radius and the angle in radians subtended by the arc. In this case, the distance traveled on the circumference of the wheels is equal to the linear speed multiplied by the time taken.

We can calculate the radius of the wheels by dividing the diameter by 2, which gives us 15 inches. Converting the linear speed from miles per hour to inches per minute, we get (55 mi/h) * (5280 ft/mi) * (12 in/ft) / (60 min/h) ≈ 58080 in/min.

The angular speed is then obtained by dividing the linear speed by the radius of the wheels. So, the angular speed of the wheels in rad/min is approximately 58080 in/min / 15 in ≈ 3872 rad/min.

To find the number of revolutions per minute (rpm), we divide the angular speed by 2π, as one revolution is equal to 2π radians. Therefore, the wheels make approximately 3872 rad/min / (2π) ≈ 616.29 rpm.

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Answer:

not if its moving upwards but eventually it will be on its way down

Explanation:

Answer:

Explanation:

magnetic field B = (3 i + 8 x 2 j )x 10⁻³ T

= (3 i + 16 j )x 10⁻³ T

L = - i ( unit length of conductor )

Force F = I ( L x B ) , I is current

= 5 [ - i x ( 3i + 16 j ) 10⁻³]

= 5 ( - 16 k ) x 10⁻³

F = - 80 x 10⁻³ k

Answer:

you gotta give the picture man

Answer:

objects with greater mass should have greater inertia

In a p-V (pressure-volume) diagram for water, the line that exists is the saturated liquid line. This line represents the boundary between the liquid and vapor phases of water at equilibrium. It indicates the conditions at which water exists as a saturated liquid.

The saturated vapor line, on the other hand, represents the boundary between the liquid and vapor phases of water when it exists as a saturated vapor. The saturated solid line is not applicable in a p-V diagram for water, as water does not have a stable solid phase at standard atmospheric conditions.

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Answer:

B.

Goals are scored by kicking the ball through goalposts.

Explanation:

Answer:

Blood is both a tissue and a fluid. It is a tissue because it is a collection of similar specialized cells that serve particular functions. These cells are suspended in a liquid matrix (plasma), which makes the blood a fluid

A radioactive element, also known as a radionuclide or radioisotope, is an element that exhibits radioactivity.

Radioactive elements are the elements that have an unstable nucleus and emit radiation when their nucleus undergoes a process called radioactive decay. Radioactive decay is a random process that occurs in some of the elements with unstable atomic nuclei.

During this process, the nucleus emits alpha, beta, or gamma particles, which transform the nucleus into a more stable state. As a result, these elements are radioactive and can release high-energy particles or electromagnetic waves in the form of radiation, which can be dangerous for living organisms. Radioactive elements are mainly classified into two types: natural radioactive elements and artificially produced radioactive elements.

Natural radioactive elements are those that occur in nature, and their nuclei naturally undergo radioactive decay. For example, Uranium, thorium, and radium are natural radioactive elements. The artificially produced radioactive elements are those that are synthesized through nuclear reactions in a laboratory. For example, technetium and plutonium are artificially produced radioactive elements.

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Answer:

focal length

Explanation:

This describes focal length of the beam

Answer:

all of the wind would have to stop completely upon contact with the turbine

Explanation:

Wind turbines work by slowing down passing wind in order to extract energy. If a wind turbine was 100% efficient, then all of the wind would have to stop completely upon contact with the turbine—which isn't possible by looking at a wind turbine.

It takes approximately 4.59 seconds for the car to come to a stop. the car's initial speed was approximately 110.2 ft/s,

To determine the time it takes for the car to stop and the car's initial speed, we can use the kinematic equation:

v² = u² + 2as

where:

v is the final velocity (0 ft/s, since the car comes to a stop),

u is the initial velocity (unknown),

a is the acceleration (-24.0 ft/s², as the car slows down),

and s is the distance traveled (253 ft).

Plugging in the known values into the equation, we can solve for u:

0² = u² + 2(-24.0 ft/s²)(253 ft)

0 = u² - 48.0 ft/s² * 253 ft

48.0 ft/s² * 253 ft = u²

u² = 12144 ft²/s²

Taking the square root of both sides:

u = √12144 ft/s

u ≈ 110.2 ft/s

So, the car's initial speed was approximately 110.2 ft/s.

Now, to find the time it takes for the car to stop, we can use the equation:

v = u + at

0 = 110.2 ft/s + (-24.0 ft/s²) * t

24.0 ft/s² * t = 110.2 ft/s

t = 110.2 ft/s / 24.0 ft/s²

t ≈ 4.59 s

Therefore, it takes approximately 4.59 seconds for the car to come to a stop.

In summary, the car's initial speed was approximately 110.2 ft/s, and it took approximately 4.59 seconds for the car to come to a stop while skidding a distance of 253 ft.

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The same-side exterior angles are not congruent, they are supplementary. The same side exterior angles are formed and they have a sum of 180 degrees.

Congruent refers to having the same precise size and shape. Even if we flip, turn, or rotate the forms, their shape and size need to remain constant. If it is possible to superimpose one geometric figure onto the other such that they correspond throughout, then the two are said to be congruent, or to be in the relation of congruence.

In general relativity, a congruence (more precisely, a congruence of curves) is the collection of integral curves of a (never vanishing) vector field in a four-dimensional Lorentzian manifold that is used to physically represent spacetime.

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3. They are higher in average density than are the terrestrial planets. Because they have significantly smaller percentages of metal and rock, the jovian planets are less dense than the terrestrial planets.

A planet that is dominantly made of silicate rocks or metals is referred to as a terrestrial planet, telluric planet, or rocky planet. Mercury, Earth, venus and Mars are the inner planets in the Solar System that are nearest to the Sun and are recognized by the IAU as terrestrial planets.

Consequently, a planet classified as Jovian is a gas giant that mostly consists of hydrogen and helium gas with minor amounts of heavier components. These planets each have their own ring systems in addition to having enormous systems of moons.

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Generator functions can be used on their own to create iterable objects. They are defined using the "yield" keyword instead of "return" and generate a sequence of values as they are iterated over.

On the other hand, generator functions can also be used within the __iter__ method of a class to create iterable objects. In this case, the generator function is defined within the class and called when the object is iterated over. This allows for greater control over the iteration process and the ability to add additional functionality to the iterable object. By defining the generator function within the class, it can also access the object's attributes and methods, allowing for greater flexibility in the iteration process. Overall, using generator functions within a class allows for more customizable and efficient iteration over large datasets.

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Answer: D.

Explanation:

I just took a quiz im in highschool too and I got a 100

If you mix hot water and cold water in an isolated medium the mixture would have the temperature intermediate of the initial temperatures of the hot water and the cold water because of heat transfer.

How heat is transferred ?

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The value for the permeability of free space is 0.00035 tesla.

Tesla is a unit of measurement used to measure the strength of a magnetic field. It is named after the Serbian-American inventor and electrical engineer Nikola Tesla. The tesla is defined as the strength of a magnetic field that will induce an electric current of one ampere in one linear metre of a wire when the field is changing at a rate of one weber per second. This unit is used in a variety of applications such as measuring the strength of magnetic fields produced by electromagnets, measuring the strength of Earth’s magnetic field, and measuring the strength of a magnetic field produced by a superconductor. One tesla is equal to 10,000 gauss, which is the magnetic field strength used to describe the Earth’s magnetic field. Lag free is a term used to describe a system that is not subject to delays or pauses.

To convert from gauss units to tesla units, use the conversion factor of 1 gauss = 10^-4 teslas. Thus, the slope of 0.35 gauss is equivalent to 0.00035 teslas.

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The acceleration of the car is 0.75 m/s².

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.

Calculation:-

v = u +at

a = (v - u)/t

   = (32.5 - 28)/6

    = 0.75 m/s²

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