An amusement park ride consists of a rotating

circular platform 12.5 m in diameter from

which 10 kg seats are suspended at the end

of 2.54 m massless chains. When the system

rotates, the chains make an angle of 24.4° with the vertical.

The acceleration of gravity is 9.8 m/s^2.

1. What is the speed of each seat? Answer in units of m/s.
2. If a child of mass 63.6 kg sits in a seat, what is
the tension in the chain (for the same angle)? Answer in units of N.

A DNA fork is a structure that forms during DNA replication. The double helix structure of DNA needs to be unwound in order for replication to occur. The labeled diagram is attached below.

This unwinding takes place at a specific point on the DNA molecule called the replication fork. The replication fork is formed by the separation of the two complementary strands of the DNA double helix, and it acts as a template for the synthesis of new DNA strands. The replication fork is maintained by enzymes called helicases, which unwind the DNA, and primases, which add short RNA primers to the template strands. The process of replication continues as the two strands of DNA are separated and new nucleotides are added to each strand by DNA polymerase.

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The complete question is as follows:

Answer:

20

Explanation

f=Kgm/s
2multiply by 10=20

Give brainliest

The mean free time between collisions for aluminum wire is

1.62 * 10^-20 s and the mean free time between collisions for Iron is

1.68 * 10^-20 s.

Electrons are subatomic particles that carry a negative electrical charge. They are found outside the nucleus of an atom and are responsible for chemical reactions, electrical conductivity, and magnetism.

The mean free time between collisions for electrons in a metal wire can be calculated using the mean free path (λ) and the electron density (n) of the metal. The mean free time between collisions is given by the equation:

τ = λ / v

Where τ is the mean free time, λ is the mean free path, and v is the velocity of the electrons.

Using the formula, we can calculate mean free path:

λ = 1 / (n * σ)

Where σ is the collision cross-section, which is a measure of how likely it is for an electron to collide with an atom in the metal.

For aluminum, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.49 * 10^28 * 2.82 * 10^-15) = 3.51 * 10^-14 m

For aluminum, the mean free time between collisions is:

τ = λ / v = 3.51 * 10^-14 m / (2.18 * 10^6 m/s) = 1.62 * 10^-20 s

For Iron, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.05 * 10^28 * 2.82 * 10^-15) = 3.65 * 10^-14 m

For Iron, the mean free time between collisions is:

τ = λ / v = 3.65 * 10^-14 m / (2.18 * 10^6 m/s) = 1.68 * 10^-20 s

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The statement "The excitation of the mercury vapor glows the phosphorus coating inside the lamp of a fluorescent lighting." is true.

In a fluorescent lamp, the electric current excites the mercury inside the lamp which is in vapor form. This process generates the ultraviolet light wave of very short wavelength, which causes the glow of phosphorus coating inside the lamp. Thus a fluorescent lamp converts the very little electrical energy into useful and sufficient light energy.

--The given question is incomplete, the complete question is "Which of the following statement is true about fluorescent lighting? a) Phosphorus coating inside the lamp of a fluorescent lighting glows by the excitation of the mercury vapor. b) The efficiency of fluorescent lighting is much low."

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To attain the ld50, the individual would need to consume 30 grams of cuprous sulfate, according to the query.

The International Units System (SI) uses the kilogram (sometimes known as the kilogramme) as the mass measurement unit. It is a measuring unit that is widely used in research, engineering, and trade from around globe. Its meaning is "1,000 grams."

Since the metric (SI) system employs numbers rather than words, the sign for kilograms (kg) does not require a s when used in the plural. Cement weighs 25 kilograms each bag (not 25 kgs).

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Now, the binding energy per nucleon, DeltaE / 32 nucleons for S = 4.36 x 10-11 J / 32

Now, calculating the theoretical mass of 32S,

32S contains 16 protons and 16 neutrons,

Also, we know,

Mass of proton = 1.00728 amu

Mass of neutron =1.00866 amu

1 amu = 1.66 x 10-27 Kg

Thus,

Mass of protons = 16 x 1.00728 amu = 16.1165 amu

Mass of neutrons = 16 x 1.00866 amu = 16.1386 amu

The theoretical mass of 32S = 16.1165 amu + 16.1386 amu = 32.2550 amu

Now, the mass difference (\Deltam) = Theoretical mass - Actual mass

Deltam = 32.2550 amu - 31.9633 amu

Delta m = 0.2917 amu

Converting amu to Kg,

= 0.2917 amu x (1.66 x 10-27 Kg / 1 amu)

Deltam = 4.8443 x 10-28 Kg

Now, we know the formula,

DeltaE = \Deltam x c2

Here, c = 3.00 x 108 m/s

Substituting the known values,

DeltaE = 4.8443 x 10-28 Kg x (3.00 x 108 m/s)2

DeltaE = 4.36 x 10-11 J

The least amount of energy necessary to separate or break down an atom's nucleus into the subatomic particles that make it up is known as nuclear binding energy (which are protons and neutrons).

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Answer:

3.08

Explanation:

The work done by friction is μNd.

what is wotk done?

Work done is the amount of energy transferred by a force to an object when it moves through a distance.

It is calculated by multiplying the force applied to the object by the distance it moves.

Work done is measured in joules (J) and is represented by the equation W = F x d.

Work done by friction = Force x Distance

                                    = Friction coefficient (μ) x Normal Force (N) x Distance (d)

                                    = μNd

Therefore, The work done by friction is μNd.

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Answer: A, C, E

Explanation:

Potassium and sodium both belong to Group 1. They have the same number of valence electrons. Therefore, they form similar compounds with other elements.

The value of Ex = - (Q/(4πε0)) *(x/r³), Ey = - (Q/(4πε0)) ×(y/r³), Ez= - (Q/(4πε0)) ×(z/r³) , for the potential due to a point charge Q at origin.

At infinite distance when an electric charge isn't under the influence of the point charge, the potential is defined as zero. Electric potential at a given position is the quantum of work that has to be done to bring the charge at a finite distance from the point charge.So, the electrostatic potential from a point), at a distance r is given by,

U = 1/4πε0Qr

Both theunit charge and the point charge are positive. So, the work has to be done against the electrostatic force. Therefore, the potential is positive. However, still, if the point charge had negative value, then in that case potential would have been negative.

A) To calculate Ex, we take the partial derivative of V with respect to x: Ex = - ∂V/∂x = - (Q/(4πε0)) × (x/r³)

B) To calculate Ey, we take the partial derivative of V with respect to y: Ey = - ∂V/∂y = - (Q/(4πε0)) × (y/r³)

C) To calculate Ez, we take the partial derivative of V with respect to z: Ez = - ∂V/∂z = - (Q/(4πε0)) × (z/r³)

D) To show that the results of parts (a), (b), (c) agrees with the equation for the electric field of a point charge, we can use the equation for the electric field of a point charge E→ = (Q/(4πε0r²)r^. We can see that, Ex = -(Q/(4πε0))×(x/r²) , Ey = -(Q/(4πε0))×(y/r²), Ez = -(Q/(4πε0))×(z/r²) which is equivalent to the formula for the electric field of a point charge E → = (Q/(4πε0r²)) ^r. So, the results of parts (a), (b), (c) agrees with the equation for the electric field of a point charge.

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The block is stopped by an opposing stopping force of roughly 50 N over a horizontal surface, and it comes to rest.

The concept of "force" has a specific definition in science. This kind of force may be represented as both a push and a pull. It cannot hold an item or a force, nor can it hold a force.

These sorts of forces are there whenever two things interact and work together. Contact forces can include, but are not limited to, tension, normal, air resistance, applied, and spring forces.

v² - u² = 2as

(0)² - (10)² = 2 × a × 10

-100 = 20a

a = -100/20

a = -5 m/s²

Acceleration (a) = -5m/s²

Now,

Force (F) = Mass(m) × Acceleration (a)

F = m × a

F = 10 × -5

F = -50 N

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The given statement that hanging mass is referred to as m and it sets the centripetal force is, false.

Centripetal force is the force acting on an object in curvilinear shifting directed towards the axis of rotation or centre of curvature. Any shifting in a bending path represents accelerated motion, and requires a force directed toward the center of curve of the path.

The centripetal force is delivered by the tension in the string, not the hanging mass. The hanging mass, m, creates a gravitational force pulling downward, but it's the tension in the string pulling the mass towards the center of the circle that provides the centripetal force.

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A is the correct answer. The arrow pointing up in A represents the force of gravity (mg).

Force is an external influence that can change the motion, direction, shape, and/or energy of a physical object. It can be a push, a pull, or a twist, and it can act on an object at a distance. Force is a vector quantity, meaning that it has both magnitude and direction.

The arrow pointing to the right represents the normal force (N), which is the force that the surface exerts on the block in order to keep it from sinking into the surface due to gravity. The arrow pointing down in A represents the frictional force (f), which is the force that the surface exerts on the block in order to prevent it from sliding along the surface.

1)

T > mg

The force due to tension acts upwards on the box and the force due to gravity acts downwards on the box. As the box is accelerated upwards then the T should be greater than the weight of the box.

ma = T - mg

mg = T- ma

Therefore, T> mg

2)

The option A, best describes the free body diagram.

3) In option A, the normal force is equal to the weight of the block which is kept at rest. N = mg

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The period of this pendulum on the surface of Jupiter is 3.68 sec.

An object is drawn toward the earth's core by the force of gravity. The acceleration brought on by gravity is 9.8 m/s2 on earth. The formula used to determine the acceleration brought on by gravity is g = GM/r2.

Using Newton's equations, we may determine the gravitational pull between two objects. F = G (M x m) / r squared, where M is the mass of one item, m is the mass of the other object, and r is the separation between the centers of the two masses, is the formula for Newton's law of gravitation.

Given:

Period of the pendulum on the Earth = T_e = 1.70 s

Gravitational Acceleration of the Earth = g_e = 9.8 m/s²

Gravitational Acceleration of the Mars = g_m = 3.71 m/s²

[tex]T_m=\sqrt{\frac{g_e}{g_m} } *T_e[/tex]

[tex]T_m=\sqrt{\frac{9.81}{26} } *6[/tex]

[tex]T_m=\sqrt{0.377} *6[/tex]

[tex]T_m=3.68s[/tex]

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signifies a development or size increase caused by a slow process of external addition and accumulation. The term "accretion" refers to the process in astrophysics and planet physics whereby a celestial object gains mass through the gravitational accumulation of smaller celestial objects and surrounding gas.

The steady growth in size of an item caused by the accumulation of materials due to gravity is known as accretion. In those other words, as tiny amounts of matter are drawn to an object by gravity and adhere to it, the object will become larger and larger.

Gravitational forces acting on material of all sizes and compositions, including gas, dust, plasma, and even dark matter, inevitably lead to accretion. Matter accretes because of gravity. Additionally, as matter gathers, it creates objects.

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The distance travelled by the truck before coming to a stop is 72.9 m.

The acceleration of the truck is calculated by applying Newton's second law of motion as follows.

F = ma

a = F / m

where;

a = ( -300,000 ) / ( 60,000)

a = -5 m/s²

The distance travelled by the truck before coming to a stop is calculated as follows;

v² = u² + 2as

where;

0 = u² + 2as

0 = (27²) + (2)(-5)(s)

= (27²) - 10s

10s = 27²

s = ( 27² ) / 10

s = 72.9 m

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Answer:

D(displacement) = 3 km E + 1 km W + 2 km W = 0

Total displacement (vector) = 0

Total displacement (scalar) = 6 km

magnitude implies a total displacement of 6 km

A tilted surface is referred to as an inclined plane in physics. A known imbalanced force causes objects to accelerate down inclined planes.

If there is no net force acting on an object, it will slide down an inclined plane at a constant speed. Translational kinetic energy, which is equal to half the object's mass times the square of its velocity, is a form of kinetic energy that slides have. Rotational kinetic energy is a special kind of kinetic energy that is present in rotating objects like spinning tops. An object in motion has kinetic energy in both directions, translation and rotation. Since the steel sphere is circular and moves more quickly than a block, it reaches the bottom first.

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the spring constant of the spring is k. the spring is initially compressed a distance x0. the block is released from rest.

Velocity is the measure of the amount of distance an object covers in a given amount of time. Here's a word equation that expresses the relationship between distance, velocity and time: Velocity equals distance travelled divided by the time it takes to get there.

Speed = Distance/Time – This tells us how slow or fast an object moves. It describes the distance travelled divided by the time taken to cover the distance. Time = Distance / Speed, as the speed increases the time taken will decrease and vice versa.

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In the above case, It is not possible for it to rain cats and dogs as it is a figure of speech and not a literal occurrence. Similarly, humans cannot turn into a different species as it goes against the laws of science .

What is the species about?

The statement above is not entirely accurate. Raining cats and dogs is a phrase used to describe heavy rain, it is not a real phenomenon. And humans cannot turn into a different species, it is a biological impossibility.

What does it imply when it says it's raining cats and dogs?

Consequently, a storm with strong winds (cats) and heavy rain may be described as "raining cats and dogs" (cats). Greek word cata doxa, which means "contrary to experience or conviction," may have been the source of the phrase "cats and dogs." It is raining exceptionally or ridiculously hard if it is raining cats and dogs.

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The linear speed will be 24π

To find the linear speed in (km/hr) Use conversion as follows

1 km = 100000 cm

1 hr = 60 min

radius of a disc(r) = a point from a center of a disc = 5 cm

= 5/100000

=0.00005km

=5 × 10⁻⁵

Angular speed of the drive can be found as

ω= 2πr / T

where v is the angular speed and T is the time for 1 revolution.

T= 1/n ; where n is the revolution per min.

Substitute the given values we have;

ω =4000×2π × 5 × 10⁻⁵

Simplify:

ω= 4 × 10⁻¹ π km\min

1 hour = 60 minutes.

then;

ω = 60 ×4  × 10⁻¹ π

ω = 24 × 10⁻¹

ω = 24π km\min

therefore, the linear speed in km/hr is, 24π

Your uestion is incomplete most probably your full question was

A drive has a maximum speed of 10.000 revolutions per minute. if a disc has a diameter of 14 cm, what is the linear speed, in km/h of a point 5 cm from the center of the disc is spinning at a rate of 4000 revolutions per minute

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Force along the third rope is 2F rmABcostheta in magnitude. Newton's second rule of motion is a necessary topic to understand in order to answer this question.

In terms of physics, magnitude is just "distance or quantity." In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope. In physics, the term "magnitude" often refers to a size or amount.

How much and which way are answered by the magnitude and direction respectively. As an illustration, the magnitude 5 meters and the direction North. A vector quantity with both magnitude and direction is 5 meters north.

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The time required for the car to accelerate from rest to a speed of 28 m/s is 4 seconds.

Acceleration is the rate of change of velocity of an object with respect to the time taken. An object's acceleration is the net result of any and all the forces which are acting upon the object, as described by the Newton's Second Law of Motion. The SI unit for acceleration is meter per second square (m/s²).

Acceleration is the rate of change in the velocity of an object.

a = (v-u)/t

a = 7m/s²

v = 28m/s

u = 0m/s

t = ?

t = (v-u)/ a

t = (28-0)/ 7

t = 28/ 7

t = 4 sec

The time taken to reach the speed of 28 meter per second is 4 seconds.

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It will take 8 m/s to travel the distance.

The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. It is a vector quantity to accelerate (in that they have magnitude and direction).  

The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law the amount of an object's acceleration is the combined result of two causes:

According to the materials used to make the object, the magnitude of the net balance of all external forces acting on it is inversely proportional to its mass, but the magnitude of the net resulting force is directly proportional to the net force.

Therefore, It will take 8 m/s to travel the distance.

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It takes 1.28s for the light to travel from the moon to earth.

What is light Year?

In a vacuum, light moves at a speed of 186,000 miles or 300,000 kilometres per second. Light can circle the Earth seven times in a single second to give you a quick idea of how fast this is! The speed of light is used by astronomers to calculate how far away in space an object is. Light-years are units used to describe the distance that light can cover in a year (ly).

A light-year is a measurement of length.

It is the distance that a light photon covers in a single Julian year in the vacuum.

by the letter ly

One light year has a fixed value.

The speed of light (c) is constant everywhere, it is

299,792,458m/s=299,792.458km/s

Therefore, it takes 1.28s for the light to travel from the moon to earth.

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The speed of the space shuttle is in orbit about the earth at an altitude is calculated to be 7.68 × 10³ m/s.

Given that,  

Satellite's centripetal acceleration a = 8.7 m/s²

Mass of the Earth M = 5.98 × 10²⁴ kg

Gravitational constant G = 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻²

R is radius of satellite's orbit

v be satellite's velocity

The satellite's centripetal acceleration a = v²/R must be equated to gravitational acceleration GM/R²

v²/R = GM/R²

v² = GM/R

R = GM/ v²

v² = GM/ (v²/a)

v = (GM a)^ 1/4

Putting in the values, we have,

v = (6.67 × 10⁻¹¹ × 5.98 × 10²⁴ × 8.7)^ 1/4 = 7.68 × 10³ m/s

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The angle from vertical of the axis of the second polarizing filter is found to be be 32.9°.

Your camera's polarizing filter reduces sparkling reflections. The same principles apply to polarising sunglasses. Your eyes are shielded from glare from the road or water by polarising sunglasses. Sunglasses that are polarising can be identified. When unpolarized light strikes a polarizer, the amount of polarised light that emerges is half that of the unpolarized light that struck the polarizer in the first place.

=> I1= 350/2 = 175 w/m2.

I2 = I1 cos^2 Ф

    Ф=> cos^-1 (sqrt (I2/I1))

         => cos^-1 (sqrt(126/175))

         => 32.9°.

Short electromagnetic wave bursts released by several atoms make up unpolarized light. Similar to polarized light, these bursts' electric field directions are random around the wave's path of travel but perpendicular to it.

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Answer:

Explanation: The expression would be

M1V1 = M2V2

The 80.50 dollars would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 32.0 mi/gal.

To convert a given amount expressed in terms of unit miles to unit kilometres, use the miles to km formula. There are 1.6 kilometres in a mile.

The currency and monetary unit of the European Union is the euro, denoted by the sign €. Prior to being released as currency notes and coins in 2002, it started out as a noncash monetary unit in 1999. The national currencies of participating EU members and certain non-EU states were replaced by the euro.

Calculation:

Total km so 113km per day for 7 days is 791 km.

Then we change 791km to miles = 491.211 miles.

Since the car is 32 miles per gallon we divide 491.211/32= 15.35 gallons.

We change gallons to liters so we have 15.35gal x 3.785L= 58.09 L

At 1.10 euros per liter is 58.09 x 1.10 = 63.89 euros.

Assume 1 euro =- 1.26 dollars

Change euros to dollars 63.89 x 1.26 = 80.50 dollars.

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The charge on the sphere is equal to the product of the potential (25.0 kV) and the capacitance of a sphere (4πε0R).

What is the charge ?

The charge is the amount of money that a person is required to pay for a service or product. It is usually a fee that must be paid to access or use a service or product. In the case of a criminal charge, it is the amount of money that a person is required to pay in order to be released from jail or prison after being charged with a crime. Charges can also be fees charged by a business or organization for a service or product, such as a membership fee.

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