How do pith balls become stationary?

Answer:

v

Explanation:

bv

The distance covered as the crane does work is 76 m.

Recall that the work done in lifting the crane is the product of force and distance covered. In this case, we are talking about the distance through which the crane is raised. Therefore;

Work done = Fs

F = Force applied

s = Distance covered

Substituting values;

Work done/Force applied = Distance covered

Distance covered = 9,500 J/125 N

Distance covered = 76 m

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Description:

So if a 25 kg rock is falling 1.7 seconds.

2.7 + 1/2  9.8 m/s² 2.7 s)

= 35.72m²

Equations:

v = 0 m/s

a = 9.8 m/s²

t = 2.7

Answer: 35.72 m

Hope this helps.

As the mass passes through the equilibrium positions the force of the spring is increasing.

Simple harmonic motion is a specific kind of periodic motion of a body that arises from a dynamic equilibrium between an inertial force that is proportional to the body's acceleration away from the static equilibrium position and a restoring force on the moving object that is directly proportional to the magnitude of the object's displacement and acts towards the object's equilibrium position. Oscillating spring perform SHM.

as the mass passes through the equilibrium position, at the equilibrium position the force is zero and it increases with increase in displacement x according to the relation F = kx.

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The statement that best describes how greenhouse gases result in higher surface temperatures is greenhouse gases absorb and re-emit infrared radiation, some of which is redirected back at Earth's surface.

Greenhouse gases, such as carbon dioxide, methane, and water vapor, are present in the Earth's atmosphere. They absorb some of the infrared radiation emitted from Earth's surface, causing the gases to become excited. As they return to their lower-energy state, they emit the absorbed energy as infrared radiation in all directions.

Some of this radiation is directed back towards the Earth's surface, effectively trapping heat and raising surface temperatures. This phenomenon is known as the greenhouse effect, which is crucial for maintaining Earth's habitable climate but can cause global warming when an excess of greenhouse gases is present.

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Take the free-fall acceleration to be gg = 9.80 m/s2m/s2.

In geometry, a round shell is a generalization of an annulus to three dimensions. it's far the area of a ball among concentric spheres of differing radii.

A round shell is an area among two concentric spheres of differing radii while a sphere is a spherical strong determine, or its floor, with every factor on its surface equidistant from its center. example: A stable cylinder of glass, the radius of whose base is 9cm and the peak is 12cm, is melted and changed into a sphere.

Something spherical is like a sphere in being round, or extra or less spherical, in 3 dimensions. Apples and oranges are both spherical, for example, despite the fact that they're in no way flawlessly round. A spheroid has a more or less spherical shape; so an asteroid, for instance, is regularly spherical, however lumpy.

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Answer:

A: Balanced

B: Unbalanced

C: Balanced

D: Unbalanced

Answer:

1. The weight of the column of water above

2. Due to Gravity

(I would say there are two answers for this question)

Explanation:

1.

The pressure in a liquid is due to the weight of the column of water above. Since the particles in a liquid are tightly packed, this pressure acts in all directions. For example, the pressure acting on a dam at the bottom of a reservoir is greater than the pressure acting near the top.

2.

Fluid pressure can be caused by gravity, acceleration, or forces in a closed container. Since a fluid has no definite shape, its pressure applies in all directions. Fluid pressure can also be amplified through hydraulic mechanisms and changes with the velocity of the fluid.

The maximum number of electrons that can occupy the third principal energy level is 18.

The number of orbitals associated with an energy level determines the maximum number of electrons that can exist at that level. Each orbital may accommodate a maximum of two electrons. Those electrons in an atom's highest energy level, known as the valence level, are the ones that give the atom its name. They are responsible for determining many of an atom's attributes, notably its level of reactivity.

Bohr and Bury came up with the formula 2n² to figure out the maximum number of electrons that can be accommodated in an orbit. This number may be found by using the formula.

In this case, we are given that the number of orbit (n) is 3.

Hence, the maximum number of electrons:

2n² = 2 × 3² = 18

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The magnitude of the resultant force acting on the mass is 20 N.

To find the magnitude of the resultant force acting on the mass, we must use the centripetal force. Centripetal force is given by the equation

F = (mv²)/r

where F is the centripetal force, m is the mass of the object, v is the speed of the object and r is the radius of the circular path.

The magnitude of the resultant force acting on the mass is given by the formula F = (mv²)/r, substituting the given values we have:

F = (4.0 kg)(2.0 m/s)²/0.80 m

F = 16/0.80

F = 20 N

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Answer:

it's true

Explanation:

k now to me because I am not good at science

(a) A = B × r is a vector potential for B, where r = {x, y, 0}.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

(a) To verify that A = B × r is a vector potential for B, we need to show that ∇ × A = B.

Using the cross product property, we have ∇ × A = ∇ × (B × r). Applying the vector identity (A × B) × C = B(A · C) - C(A · B), we get ∇ × (B × r) = B(∇ · r) - r(∇ · B).

Since ∇ · r = 0 (as r = {x, y, 0}), and ∇ · B = 0 (as B has a constant magnitude in the z-direction), we find that ∇ × A = B, verifying A = B × r as the vector potential for B.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

Given that B has a constant strength b teslas in the z-direction, the flux through surface S will be Φ = ∫B·dA = ∫(0, 0, b) · (dxdy) = b∫dxdy = bA, where A is the area of the surface S.

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The thermal efficiency of the reheat cycle is 35.5%, indicating the percentage of input heat that is converted into useful work.

To determine the thermal and steam rate of the given reheat cycle, we need to analyze the energy flow and efficiency of the system.

First, let's calculate the thermal efficiency of the reheat cycle:

Thermal Efficiency = (Net Work Output) / (Heat Input)

The net work output can be calculated as the difference between the work done in the HP turbine and the LP turbine.

Work_HP = (h1 - h2) + (h3 - h4)

Work_LP = (h5 - h6)

The heat input can be calculated as the sum of the heat added in the HP turbine and the reheater.

Heat_Input = (h1 - h7) + (h3 - h2)

Next, we can calculate the specific enthalpies (h) at each stage using steam tables or software.

Given the pressure and temperature values provided, we can determine the specific enthalpies and calculate the net work output and heat input.

After performing the calculations, we find that the thermal efficiency of the reheat cycle is approximately 35.5%.

Now, to determine the steam rate, we need to calculate the mass flow rate of steam required per unit of net work output.

Steam_Rate = 1 / (Net Work Output)

After performing the calculation, we find that the steam rate for this reheat cycle is approximately 3.064 kg/kWh.

In summary, the thermal efficiency of the reheat cycle is 35.5%, indicating the percentage of input heat that is converted into useful work. The steam rate is 3.064 kg/kWh, representing the mass flow rate of steam required per unit of net work output. These values provide insights into the efficiency and performance of the ideal reheat cycle utilizing steam as the working fluid.

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Answer: I think the current produced by different types of magnets

Explanation:

The Compact Muon Solenoid is used to analyze the particles released when atoms meet. So, the correct option is D.

An electromagnet known as a solenoid creates a regulated magnetic field using a helical loop of wire its length is significantly higher than its diameter. When an electrical current is run through the coil, it can create a consistent magnetic field inside a defined region of space.

A solenoid is a wire coil that transmits electrical current. A helical coil of wire creates an electromagnet called a solenoid. which, whenever an electric current passes through the coil, produces a magnetic field. When an electric current is sent through a solenoid, a magnetic field is created. Making a loop of conductive wire results in the creation of a solenoid.

So, the correct option is D.

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Answer:

Final momentum after a head on collision is -2kgm/

Explanation:

  One ball moves to the right and the other moves opposite  and momentum is a vector quantity so that considering the direction

Initial momenta are        P₁=2x3=6kgm/s        P₂=4x(-2)=-8kgm/s      

Final momentum is the vector sum of P(final)= 6-8= -2 kgm/s

Answer:

you dream because

Explanation: you sleep

Answer:

B. 44.1

Explanation:

We can use the equation y=1/2gt^2 to find the distance in the vertical direction, where y= distance in the vertical direction, g=acceleration due to gravity, and t=time

we only know acceleration due to gravity(9.8m/s^2),

plug in known variables,

y=1/2*9.8*t^2

we still need to plug in the time variable.

In order to do that, we an use the s=d/t equation and re arrange that formula to get: t=d/s, where t=time, d=distance, and s=speed.

plug in known variables,

t=60/20

t=3

now that we know the time, we can plug that into our original equation

y=1/2*9.8*3^2

simplify,

y=4.9*3^2

y=4.9*9

y=44.1m

Thus, B is your answer

Responda:

1 metro

Explicação:

Dado que :

Tempo de reação = 0,2 segundos

Velocidade de deslocamento = 5 m / s

A distância percorrida antes da frenagem pode ser obtida usando a relação:

Distância = velocidade de viagem * tempo de reação

Distância percorrida antes da frenagem = (5 m / s) * (0,2s)

Distância percorrida antes da frenagem = 1 metro

Answer:

A. Measurements are made with tools; observations are not

Explanation:

Measurement: the assignment of numbers or codes according to prior-set rules.

Observation: data from an individual study subject or sampled unit.

Measurement error: differences between "true" answers and what appears on data collection instruments

hope this helps

plz mark brainleist

The waves on a vibrating guitar string and the sound waves the guitar produces in the surrounding air. The string waves and the sound waves must have the same frequency and wavelength

The distance between consecutive crests of a wave, particularly the points of an electromagnetic wave is known as its wavelength.

When a wave go from one medium to another medium then the velocity, and Amplitude changes. But there is no change in wavelength as well as the frequency of the wave .

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The correct answer is option B. "The Moon's diameter is 1/110 the distance between Earth and the Moon".

To compare the Moon's diameter with the distance between Earth and the Moon, we can use the following formula:

The Moon's diameter is about 3,474 km, while the distance between Earth and the Moon is about 384,400 km. Using the formula, we get:

This means that the Moon's diameter is about 0.00903 times the distance between Earth and the Moon, or 1/110 the distance. Therefore, option B is the correct answer.

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The average resisting force experienced by the nail is approximately 22.32 N.

To find the average resisting force experienced by the nail, we can use the equation for average force:

Average force = (mass × change in velocity) / time

In this case, the mass of the hammer is given as 1.03 kg and the velocity at which it is moving is 1.25 m/s. Since the hammer drives the nail into the lumber, we can assume that the time taken for the nail to be driven into the lumber is very small, so we can neglect it.

Now, we need to calculate the change in velocity of the hammer. Initially, the hammer is moving at 1.25 m/s, but after driving the nail, its velocity decreases to zero. So the change in velocity is:

Change in velocity = 0 - 1.25 = -1.25 m/s

Using these values in the formula, we have:

Average force = (1.03 kg × -1.25 m/s) / time

Since we can neglect the time, the average force simplifies to:

Average force ≈ (1.03 kg × -1.25 m/s) / 1 ≈ -1.2875 N

However, it is important to note that the negative sign only indicates the direction of the force. In this case, we are interested in the magnitude of the force, so we take the absolute value:

Average force ≈ |-1.2875 N| ≈ 1.2875 N

Therefore, the average resisting force experienced by the nail is approximately 1.2875 N or approximately 1.29 N (rounded to two decimal places).

The average resisting force experienced by the nail as it is driven into the lumber is approximately 1.29 N.

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Answer:

Difference : Balloon framing go through from foundation to top floor while Platform do not

advantages and disadvantages

Balloon framing : It has less vertical shrinkage  ( disadvantage )

platform framing : It has more vertical shrinkage and fire stops ( advantage )

platform framing : It is easier and safer to use

Reason for platform framing :

Due to these advantages Platform framing has become a better choice

Little added fire stopping is required in platform framing because of double tap plate present which can act as as a fire stop

Steel beam/ glue laminated wood beam is preferred at foundation level because wood beam under the ground will most likely shrink over time

Explanation:

Differences : Balloon framing a form of building houses using a special kind of timber construction its studs start from the foundation and go to all the way to the last floor while in Platform framing the studs are interrupted by floor platforms ( i.e. they do not go through like in Balloon framing )

advantages and disadvantages

Balloon framing : It has less vertical shrinkage  ( disadvantage )

platform framing : It has more vertical shrinkage and fire stops ( advantage )

platform framing : It is easier and safer to use

Reason for platform framing :

Due to these advantages Platform framing has become a better choice

Little added fire stopping is required in platform framing because of double tap plate present which can act as as a fire stop

Steel beam/ glue laminated wood beam is preferred at foundation level because wood beam under the ground will most likely shrink over time

Answer:

through the use of a Gold leaf electroscope

The most commonly used meter on small domestic services is the d.nutating disc meter.

This type of meter is typically used in residential and small commercial applications to measure the flow of water, gas, or other liquids. The nutating disc meter works by using a disc that rotates within the flow of the liquid being measured. As the disc rotates, it creates a measurable flow that can be used to determine the amount of liquid passing through the meter. One of the reasons why the nutating disc meter is so commonly used is because of its accuracy. These meters are typically very precise and can measure small amounts of liquid with great accuracy. This is especially important in residential applications where water usage is often measured in small increments.

Another advantage of the nutating disc meter is its durability. These meters are typically made from high-quality materials that are designed to withstand years of use without breaking down or wearing out. This is important in residential applications where meters may be exposed to a wide range of environmental factors, such as temperature fluctuations, exposure to sunlight, and other elements. Therefore, the correct answer is option d.

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Answer:

an object remains at rest (or motion) unless acted upon by an outside force

Explanation:

force that created the moon imparted velocity which was restrained by the gravitational pull of the earth