The hour and minute hands of the clock in the famous Parliament Clock Tower in Lon- don are 1.3 m and 2.8 m long and have masses of 94 kg and 58 kg, ...
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The Parliament Clock Tower, also known as the Big Ben, is an iconic landmark in London and one of the most famous clocks in the world. The clock mechanism is composed of various gears and levers, which work together to drive the motion of the clock hands. The hour and minute hands are the most prominent features of the clock, and they are responsible for indicating the current time to the public.
The hour and minute hands of the Parliament Clock Tower are 1.3 m and 2.8 m long, respectively, and have masses of 94 kg and 58 kg. The motion of the hands is driven by a complex mechanism that is powered by gravity and a motor. The hands move at a constant rate, and their motion is regulated by the clock mechanism.
The mass of the hands is an important factor in the clock's accuracy and stability. The heavier the hands, the more energy is required to move them, and the more stable their motion will be. The weight of the hands also affects the rate at which the clock loses energy due to friction and air resistance, which can cause inaccuracies over time.
The Parliament Clock Tower is an impressive feat of engineering, and the hour and minute hands are a testament to the precision and craftsmanship required to build such a remarkable clock. Despite being over 150 years old, the clock continues to operate with incredible accuracy, and it remains one of the most recognizable symbols of London and British culture.
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Related Questions
"Why do we refer to light as a wave?" Give at least THREE evidence statements that
indicate light is a wave.
Pls help
Answers
Waves can be reflected. Light can be reflected.
Waves can show diffraction and interference. Light shows diffraction and interference.
what are the two pieces of evidence that support the theory of continental drift?
Answers
Answer:
the two pieces are:
Evidences of sea floor spreadingGeographical similarities between the opposing coast of Atlantic oceanExplanation:
Evidences of sea floor spreading
It has been reported that from geodetic evidence that Greenland is drifting westward at the rate of 20cm per year.
Geographical similarities between the opposing coast of Atlantic ocean
The outlines of the coast on the other two sides of the Atlantic are such that they can be easily joined together and appear to be a detached portion of one another.
in viewing the far-field diffraction pattern of a single slit illuminated by a discrete-spectrum source with the help of absorption filters, one finds that the fifth minimum of one wavelength component coincidences exactly with the fourth minimum of the pattern due to a wavelength of 620 nm. what is the other wavelength?
Answers
The other wavelength is 775 nm, since (5/4) times 620 nm is 775 nm.
we need to understand that the diffraction pattern of a single slit consists of a series of bright fringes (maxima) and dark fringes (minima) that are spaced apart by certain angles. The position of these fringes depends on the wavelength of the incident light and the width of the slit.
In this case, we are told that the fifth minimum of one wavelength component coincides with the fourth minimum of the pattern due to a wavelength of 620 nm. Let's call this wavelength λ1. We want to find the other wavelength, which we'll call λ2.
sinθ = mλ / d
For the fifth minimum of λ1, we have:
sinθ1 = 5λ1 / d
For the fourth minimum of λ2, we have:
sinθ2 = 4λ2 / d
sinθ1 = sinθ2
5λ1 / d = 4λ2 / d
λ2 = (5/4) λ1
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5 sentences about the importance of investigatory project
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Answer:
Student science investigatory projects provide students practical experience in using the scientific method and help stimulate their interest in scientific inquiry. Given the benefits society can realise from professional scientific inquiry, such goals in themselves have importance.
Hope it helps you.Suppose of electrons must be transported from one side of an electrochemical cell to another in minutes. Calculate the size of electric current that must flow.
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1605 amperes of electric current would need to flow to transport 1 mole of electrons in 1 minute.
To calculate the size of electric current that must flow to transport a given number of electrons, we need to use Faraday's law of electrolysis, which states that the amount of charge (Q) needed to transport a given number of electrons is proportional to the number of electrons (n) and the charge on a single electron (e):
Q = n * e
We can rearrange this equation to solve for the number of electrons:
n = Q / e
To determine the electric current required to transport a given number of electrons in a certain amount of time, we need to use the equation:
I = Q / t
where I is the electric current, Q is the amount of charge, and t is the time.
Using Faraday's law, we can calculate the amount of charge required to transport 1 mole of electrons:
Q = n * e = (6.02 × \(10^{23\)) * (1.6 × \(10^{-19}\)) ≈ 9.63 × \(10^4\) coulombs
Using the equation for electric current, we can calculate the size of the current required to transport this amount of charge in 1 minute:
I = Q / t = (9.63 × \(10^4\)) / 60 ≈ 1605 amperes.
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mechanism of doping in physics
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for a point source charge, if you imagine a gaussian sphere of [ select ] around it, the electric field has the same magnitude everywhere on the surface, and points radially outward or inward . the resulting electric field is proportional to [ select ] .
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When considering a Gaussian sphere around a point source charge, the electric field has the same magnitude everywhere on the surface and points radially outward or inward. The resulting electric field is proportional to the inverse square of the distance from the charge.
The term to select in the first blank is "radius" and the term to select in the second blank is "distance".
When imagining a Gaussian sphere around a point source charge, the electric field has the same magnitude everywhere on the surface.
This means that if you were to measure the electric field at any point on the surface of the sphere, it would be the same value.
Additionally, the electric field points radially outward or inward.
This means that the electric field lines emanate from the charge and extend radially outward in all directions, or they can be directed radially inward towards the charge.
The resulting electric field is proportional to the inverse square of the distance from the charge.
This means that as you move farther away from the charge, the magnitude of the electric field decreases.
Conversely, as you move closer to the charge, the magnitude of the electric field increases.
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what is the magnitude of the force exerted by the biceps fbiceps ? what is the magnitude of the force exerted by the elbow felbow ? express your answers in newtons separated by a comma.
Answers
The force exerted by the biceps and the elbow is 239.9 N and 215.89 N respectively.
When we use only your forearms to lift an object, assume that your biceps are the main muscle that lifts your arm. Suppose the weight of the forearm he is 1.50 kg. If the biceps is attached to the forearm 2.50cm from the elbow, with the forearm parallel to the floor, flex the biceps to hold a 950g ball on the end of the elbow at a distance of 36.0cm from the elbow.
Against this background,
forearm mass = 1.50 kg
forearm length = 2.50 cm
The weight of the ball is 950 g.
36.0 cm ball spacing
Forearm strength needs to be calculated. Balance Elbow Using
Torque,
Fb x Db = Wf x Df/2 + Wball x Dball
Putting Value,
Fb x .025 = 1.5 x 9.8 x .36/2 + 0
95 x 9.8 x 0.36
Fb = 239.9 N
Now elbow force,
Fb = Fl + Wf + Wb
Fl = Fb - Wf - Wb
Putting value,
Fl = 239 .9 - (1.5 x 9.8 ) - (0.95×9.8)
Fl = 215.89 N.
Therefore the force on the elbow is 215.89 N.
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lab number 14: sudden stops hurt newtons first law
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Answer:
you want to know newtons first law here.
Explanation:
An object that is at rest stays at rest or stays in motion.
Suppose the Sun suddenly shrinks in size, but the mass remains the same. According to the law of conservation of angular momentum, what would happen? Group of answer choices The Sun would rotate slower than it does now The rotation of the Sun will stay the same The force of gravity between the Sun and the planets will decrease The Sun would rotate faster than it does now The Sun's angular size in the sky will stay the same
Answers
According to the law of conservation of angular momentum, if the Sun suddenly shrinks in size, but the mass remains the same, then the Sun would rotate faster than it does now. This is because the angular momentum of the Sun is constant, so if the size decreases, then the rotation must increase to maintain the same level of angular momentum.
The law of conservation of angular momentum states that the total angular momentum of a system remains constant if no external torque is acting on it.
This means that if the Sun suddenly shrinks in size, then the total angular momentum of the system (Sun + planets) must remain constant.
Since the mass of the Sun remains the same, its moment of inertia must decrease when it shrinks in size, which means that its angular velocity must increase in order to maintain the same level of angular momentum.
Therefore, the Sun would rotate faster than it does now if it suddenly shrinks in size while its mass remains the same.
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where is most of the natural gas used in the u.s. produced?
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The vast majority of the natural gas produced in the US comes from domestic sources.
According to the U.S. Energy Information Administration (EIA), in 2020, about 96% of the natural gas consumed in the United States was produced domestically.
The top natural gas-producing states in the U.S. are Texas, Pennsylvania, and Oklahoma. Other significant natural gas-producing states include Louisiana, Wyoming, Colorado, New Mexico, and Ohio. The natural gas produced in these states is used both domestically and exported to other countries.
The natural gas industry has expanded rapidly in recent years due to advances in drilling technology, such as hydraulic fracturing or "fracking," which has made it possible to extract natural gas from previously inaccessible shale formations. As a result, the U.S. has become a major producer and exporter of natural gas, helping to increase energy security and reduce dependence on foreign sources of energy.
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how do I make a baby come out of a pickle?
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Answer:
free free free free free free free free free free free free free free free free free points
An 1640 kg car stopped at a traffic light is struck from the rear by a 820 kg car. The two cars become entangled, moving along the same path as that of the originally moving car. If the smaller car were moving at 25.6 m/s before the collision, what is the velocity of the entangled cars after the collision?
(a) What is the loss of kinetic energy (Ki - Kf) in the situation described in the example?
kJ
(b) What if the 820 kg car actually moves backwards with a speed of 1.9 m/s right after the collision instead of having a perfectly inelastic collision. What is the velocity of the heavier car immediately after the collision? Use the same convention for positive direction as defined in the example.
m/s
(c) What is the loss of kinetic energy in this case?
kJ
Answers
(a.i) The velocity of the entangled cars after the collision is 8.53 m/s.
(a.ii) The loss in kinetic energy of the situation described is 179,201.7 J.
(b) The final velocity of the heavier car if the smaller car moved backwards is 11.85 m/s forward.
What is the final velocity of the cars after the collision?
The final velocity of the cars after the collision is calculated by applying the principle of conservation of linear momentum as shown below.
m₁u₁ + m₂u₂ = v(m₁ + m₂)
where;
m₁ is the mass of the smaller carm₂ is the mass of the bigger caru₁ is the initial speed of the smaller caru₂ is the initial speed of the bigger carv is the final speed of the cars820(25.6) + 1640(0) = v(820 + 1640)
20,992 + 0 = 2460v
v = 20,992 / 2460
v = 8.53 m/s
The lost in kinetic energy of the situation described is calculated as follows;
ΔK.E = K.Ei - K.Ef
K.Ei = ¹/₂m₁u₁² + ¹/₂m₂u₂²
K.Ei = ¹/₂(820)(25.6)² + ¹/₂(1640)(0)²
K.Ei = 268,697.6 J
K.Ef = ¹/₂(m₁ + m₂)v²
K.Ef = ¹/₂(1640 + 820)(8.53)²
K.Ef = 89,495.91 J
ΔK.E = K.Ei - K.Ef
ΔK.E = 268,697.6 J - 89,495.91 J
ΔK.E = 179,201.7 J
The final velocity of the heavier car if the smaller car moved backwards is calculated as;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
where;
v₁ is the final velocity of the smaller carv₂ is the final velocity of the heavier carm₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
820(25.6) + 1640(0) = (820)(-1.9) + 1640(v₂)
20,992 = 1558 + 1640v₂
1640v₂ = 19,434
v₂ = 19,434 / 1640
v₂ = 11.85 m/s
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A centripetal force of 250 N is exerted on a 2.2 kg discus as it rotates uniformly in a horizontal circle of radius 0.85 m. Calculate the speed of the discus in both m/s and rotations per minute?
Answers
Answer:
133m/s
Explanation:
b/c 250÷2.2÷0.85=133
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Why will a ban on CFCs not really produce any saved or improved lives?
Answers
Answer:
Because they have already made an impact within our atmosphere
Answer:
Go ogle
Explanation:
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Sarah and Esther equally share the cost of a present. the present cost 18dollars how much does Sarah pay
Answers
Answer:9
Explanation: 18 divided by 2 is 9
Question 54 Marks: 1 If the radioactivity of a material is not known, the half-life cannot be determined.Choose one answer. a. True b. False
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The given statement "If the radioactivity of a material is not known, the half-life cannot be determined" is (b). false statement because half-life, in radioactivity, is the amount of time needed for half of a radioactive sample's atomic nuclei to decay.
Or, alternatively, the amount of time needed for a radioactive material's rate of disintegrations per second to decrease by half. Cobalt-60, a radioactive isotope used in radiotherapy, has a half-life of 5.26 years, for instance. As a result, after that time, a sample that contained 8 g of cobalt-60 at first would only have 4 g of cobalt-60 and would produce half as much radiation. Only 2 g of cobalt-60 would remain in the sample after an additional delay of 5.26 years.
However, neither the volume nor the mass of the initial sample are shown to decrease because when cobalt decays, unstable cobalt-60 nuclei turn into stable nickel-60 nuclei, which stay with the cobalt that hasn't yet broken down.
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What will happen to the fringe spacing if the wavelength of the light is decreased?.
Answers
Answer:
The formula is the form -
m λ = d sin Θ
As the wavelength λ is decreased sin Θ will also decrease.
One can see from the derivation that as the wavelength, being considered,
is decreased the dispersion will also decrease.
A spring has a force constant of 570. 8 n/m. Find the potential energy stored in the spring when the spring is.
Answers
The potential energy stored in the spring when the spring is182.4 J.
What is the potential energy stored in the spring?
The potential energy stored in the spring when the spring is calculated by applying the equation for energy stored in a spring as follows;
Mathematically, the formula for the energy stored in a spring is given as;
U = ¹/₂kx²
where;
k is the spring constantx is the extension of the springThe spring constant is given as 570 N/m and the extension of the spring is given as 0.8 m.
The potential energy stored in the spring when the spring is calculated as;
U = ¹/₂kx²
U = ¹/₂ (570)(0.8)²
U = 182.4 J
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the wavelength of light from a distant galaxy is shifted from 656 nm to 734 nm. what is the approximate speed of the galaxy (relative to ours) in terms of the speed of light? is the galaxy moving toward us or moving away from us?
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The observed shift in the wavelength of light from a distant galaxy is known as the redshift effect. This effect is caused by the Doppler effect, which occurs when an object is moving away or towards an observer. The redshift effect indicates that the galaxy is moving away from us, as the wavelength of light has been stretched and shifted towards the red end of the spectrum.
To calculate the approximate speed of the galaxy (relative to ours) in terms of the speed of light, we can use the formula for the Doppler effect:
Δλ/λ = v/c
where Δλ is the change in wavelength, λ is the original wavelength, v is the velocity of the galaxy, and c is the speed of light.
In this case, Δλ = 78 nm (734 nm - 656 nm) and λ = 656 nm.
Therefore, we can solve for v/c:
v/c = Δλ/λ = 78 nm / 656 nm = 0.1186
This means that the galaxy is moving at approximately 11.86% of the speed of light relative to us.
Furthermore, since the wavelength of light is shifted towards the red end of the spectrum, we can conclude that the galaxy is moving away from us. This observation supports the expanding universe theory, which states that the universe is constantly expanding, and galaxies are moving away from each other at an accelerating rate.
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Using the letters for the seven colours and starting with R (Red), what is the correct order for the colours in a rainbow? Your answer should be in the form RXXXXXX Which of these seven colours has the shortest wavelength?
Answers
Answer:
Red
Orange
Yellow
Green
Blue
Indigo
Violet
shortest wavelength: violet (380 nanometers)
¯\(°_o)/¯
Answer:
Red Orange Yellow Green Blue Indigo Violet
violet has the shortest wavelength
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what is the name of the weather device the needs to be slung in a circle to obtain an accurate measurement?
Answers
The name of the weather device that needs to be slung in a circle to obtain an accurate measurement is an anemometer.
An anemometer is a device that is used to measure the speed of the wind. It works by rotating in response to the wind, and the rotation speed is proportional to the wind speed. There are several types of anemometers, including cup, propeller, and sonic anemometers.
The cup anemometer is the most common type and consists of three or four cups that are mounted on a horizontal arm. The cups are designed to catch the wind, and the rotation speed is measured using a sensor or a mechanical device.
To obtain an accurate measurement, the anemometer needs to be placed at a height of at least 10 meters above the ground, and it needs to be slung in a circle to ensure that it is not affected by wind gusts or turbulence. The data obtained from anemometers is used in weather forecasting, climate studies, and wind energy applications.
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physics formula
Work Formula The work formula measures the multiplication of magnitude of displacement d and the component of the force. W = F × d × cosθ
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W = fd means that the work is equal to the force f times the distance d. The work is W = fd cosФ if the force is applied at an angle of Ф to the displacement.
What are work state and its SI unit?Work is a unit of energy that is generated when a force is applied to the body and the body is moved. The Joule is the SI unit of work.
Is there no displacement while work?A displacement and the force that triggered it are necessary for a force to be considered to have accomplished work on an item.
How does relocation impact the work?The displacement of the body: At constant load and constant angle between force and displacement, work is directly proportional to the displacement.
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The work formula is used to calculate the amount of energy required to move an object a certain distance.
What is energy ?Energy is a fundamental concept in physics. It is defined as the capacity for doing work or the ability to produce change. Energy can be found in many forms, such as thermal, kinetic, chemical, electrical, gravitational, and nuclear. It can be converted from one form to another and can be transferred from one object to another. Energy is neither created nor destroyed, but can be changed from one form to another. This concept is known as the law of conservation of energy. In physics, energy is used to describe the ability to do work.
It is expressed as the multiplication of the magnitude of displacement (d) and the component of the force (F) acting on the object. The angle θ is the angle between the direction of the force and the direction of the displacement. The cosine of this angle (cosθ) is used to account for the fact that the force does not always act in the same direction as the displacement. The work formula can be expressed
as: W = F × d × cosθ.
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Help number 3 ASAP !!!
Answers
i need help pls help???
Answers
Answer:
the answer is c
Explanation:
i have done this before
Which is an example of why impuise is so important?
Elevators being hoisted up by a pulley
Using nylon ropes in rock climbing
Running a race around a track
Plane taking off from a runway
Answers
Impulse is important because it is the force that changes an object's momentum.
What is momentum?Momentum is a physical concept that describes the movement of an object due to the product of its mass and velocity. Momentum is a vector quantity, meaning it has both a magnitude and a direction. In classical mechanics, momentum is conserved, meaning that the total momentum of a system remains constant over time.
In the examples given, impulse is what allows the elevator to be hoisted up, the nylon ropes to hold a climber's weight, the runner to move around the track, and the plane to take off from the runway. Without impulse, none of these activities would be possible.
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A young diver is practicing his skills before an important team competition. Use the diagram below in order to analyze the energies of the diver and complete the statements below.
Where m = mass (kg), g = 9.8 m/s2, v = velocity (m/s), h = height (m), KE = kinetic energy (J), and GPE = gravitational potential energy (J).
Use the equations above to answer the following questions.
A diver with a mass of 90 kg is at a height of 10 m, and he has not jumped off of the board yet (v = 0 m/s). When the diver reaches a height of 5 m (Point C), his gravitational potential energy is
A. 1350 J
B. 8820 J
C. 4410 J
D. 0 J
and his velocity is
E. 4.5 m/s
F. 0 m/s
G. 3.2 m/s
H. 9.9 m/s
Please help will mark brainliest
Answers
Answers:
The gravitational potential energy of the diver when he reaches point C is 4410 J.
The velocity of the diver is 9.9 m/s.
Hope you could get an idea from here.
Doubt clarification - use comment section.
\(\\ \sf\longmapsto PE=mgh\)
\(\\ \sf\longmapsto PE=90(5)(9.8)\)
\(\\ \sf\longmapsto PE=4410J\)
Now
It's converted to kinetic energy while reaching ground.
\(\\ \sf\longmapsto K.E=4410\)
\(\\ \sf\longmapsto \dfrac{1}{2}mv^2=4410\)
\(\\ \sf\longmapsto 90v^2=8820\)
\(\\ \sf\longmapsto v^2=98\)
\(\\ \sf\longmapsto v=9.9m/s\)
Feathers and a bowling ball are dropped in a vacuum, airless environment. Which one will hit the ground first?
Feathers
Bowling Ball
They will float
At the same time
Answers
Answer: at the same time
Explanation: in a vacuum, there isnt air, right? so there isnt gravity pushing down on the heavier object, so they will both land at the same time.
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A fox fleeing from a hunter encounters a 0.745 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.50 m/s at an angle of 45.0°, beginning the jump 1.99 m from the fence. By how much does the fox clear the fence? Treat the fox as a particle.
Answers
The fox which is fleeing from a hunter encounters a 0.745 m tall fence and this fox can clear the fence with a height of up to 0.895 meters.
What is Velocity?Velocity can be defined as the rate of change in the displacement of an object. It is a vector quantity as it has both the magnitude and direction. The change in velocity of an object is known as acceleration.
Given,
Initial velocity (u) = 7.50 m/s
Launch angle, θ = 45°
Height of fence = 0.745 m
Trajectory of Projectile is given by:
y = x tanθ - gx²/ 2u²cos²θ
For x = 1.99 m
y = 1.99 × tan 45° - 9.8 × (1.99)²/ 2 × (7.5)² × (cos45°)²
y = 1.99 × 1 - 9.8 × 3.96/ 2 × 56.25 × (1)²
y = 1.99 - 38.80/112.5
y = 1.99 - 0.345
y = 1.64m
At x = 1.99 m, the value of y = 1.64 m
Therefore, fox clear fence by a margin = 1.64 - 0.745 = 0.895 meters.
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b. If the mass of that sphere is 5 kg, what is the density of the sphere? (4 pts)