if a skater who is spinning pulls her arms in so as to reduce her rotational inertia by half, by how much will her angular momentum change? by how much will her rate of spin change? group of answer choices her angular momentum is doubled. her spin rate is doubled. her angular momentum is cut in half. her spin rate does not change. her angular momentum is cut in half. her spin rate is cut in half. her angular momentum does not change. her spin rate doubles.

Answer:

Below

Explanation:

CO2 buildup during exercise stimulates respiration

According to the question, Heat always flow from high temperature to cold temperature so thats why water forms ice cube.

Heat is the result of the movement of kinetic energy within a material or an item, or from a source of energy to a material or an object. Radiation, conduction, and flow are the three mechanisms through which such energy can be transferred.

The joule is the measure of heat quantity (J). Heat flow can be stated in terms of joules per second (J/s), however for practical purposes, the unit watt (W) is typically used because one joule per second equals 1 watt of heat flow.

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Susan is the correct answer. Susan opts for solar energy when they are discussing the kind of energy that's fundamental to life on earth.

Solar energy systems either use photovoltaic (PV) panels or mirrors to focus solar radiation to convert sunlight into electrical energy. This power can be converted into electricity, or it can be stored thermally or in batteries.

Clean energy comes from the sun.

When you generate power with solar panels, no greenhouse gas emissions are put into the atmosphere. Solar energy is a key energy source in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.

Each kilowatt-hour (kWh) of solar energy produced would significantly lower the emissions of harmful pollutants including sulfur oxides, nitrogen oxides, and particulate matter as well as greenhouse gases like CO2. Solar sunlight decreases water withdrawal and use.

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If the particles are closely connected, to a distance of only 29.7 cm, the force is equal to 1.024N.

Force is indeed a necessary attribute that alters or has the potential to alter an object's posture of rest as well as motion as well as its shape.

These are the kinds of forces that occur when two objects come into contact with one another physically. There are several different kinds of contact forces, including friction, tensions, normal force, acting on an object force, applied force, and spring force.

Coulomb's law F = kQ1Q2/d^2

kQ1Q2 = Fxr^2

Substituting,

kQ1Q2 = 0.0174N x (1.53m)^2

kQ1Q2 =0.0532

29.7cm = 0.297 m

F = kQ1Q2/d^2

= 0.059/(0.297)^2

F = 1.024N

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"Yes, there are components of the velocity that cannot be determined by measuring the force."

Two-dimensional motion is more complex than one-dimensional motion because velocities can point diagonally. A baseball, for instance, could be going diagonally while also moving both horizontally and vertically. We split the baseball's velocity vector into two separate horizontal start subscript and finish subscript directions to simplify our calculations.

It is challenging to attempt to solve for both the horizontal and vertical directions of a baseball in a single equation; it is preferable to use a divide-and-conquer strategy.

When we have two unknowns, we need to solve it using two equations.

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The graph points are described below.

What is kinetic energy ?

The movement of an object or a subatomic particle exhibits the kinetic energy, often known as the energy of motion. Every atom and object in motion contains kinetic energy. Kinetic energy is present whenever something moves, such as when a person walks, a baseball soars through the air, a piece of food falls from a table, or a charged particle moves in an electric field.

What is potential energy ?

A sort of energy that can be stored but is reliant on the locations of various system components in relation to one another is known as potential energy. A spring gains potential energy when it is stretched or compressed.

P.E= 1/2Kn²

K.E = 1/2 mv²

since the sum will be always constant

At point A.E. is the maximum displacement and the minimum kinetic energy

At point C displacement is maximum so kinetic energy is maximum

At point, B, D it sum of both since displacement is just half of the maximum

so half of the P.E will be converted to K.E.

Therefore, graph points are described below.

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The angular acceleration as a function of time is found to be -2βt.

The instantaneous  angular acceleration is found to be -4.18rad/s².

The average angular acceleration is found to be -2.09rad/s².

The ratio of the change in angular velocity to the time it takes for the object to experience the change is known as the average angular acceleration, or avg., of an object. The limit of the average angular acceleration as time approaches zero is known as the instantaneous angular acceleration.

Given:

a)w = z(t)= γ − β×t²

By separating the two sides in terms of t, we obtain

α = z(t) = -2βt

b)Given:  γ = 4.65rad/s and β = 0.775 rad/s³

so, For t = 2.7 sec,

angular acceleration = -2 × 0.775× 2.7 = -4.18rad/s.

c) average angular acceleration α avg = ΔW₂(t)/Δt

 α avg = W₂ ×2.7 - W₂ ×0/2.7-0

 α avg = γ - β(2.7)² - [γ - β(0)²]

α avg = -β (2.7)²/2.7

α avg = β (2.7)

α avg = 0.775 (2.7)

α avg = -2.09rad/s².

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The ball strikes the ground after an interval of approximately 1.48 seconds.

Gravitational force is the force of attraction between two objects that is proportional to the mass of the objects and the distance between them. It is the force that causes objects to fall towards the center of the earth and it is the force that holds planets and other celestial bodies in orbit around the sun.

To determine the time interval that the ball strikes the ground, we can use the equation of motion for vertical motion under the influence of gravity:

y = vit + 1/2g*t^2

where y is the vertical displacement (or height), vi is the initial velocity, t is the time interval, and g is the acceleration due to gravity (approximately 9.8 m/s^2).

We know that the initial velocity (vi) is -7.10 m/s (since it is thrown downward), the initial height (y) is 30.8 m, and the final height is 0 m (since it strikes the ground). So,

y = vit + 1/2g*t^2

0 = -7.10t + 1/29.8*t^2

To solve for t, we can divide both sides of the equation by -1/2*g

t = (-2*y/g) / vi

t = (-2*30.8/9.8) / -7.1

t = 1.48 s

So, the ball strikes the ground after an interval of approximately 1.48 seconds.

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OB. The new force will be 3 times more than the original. If the distance between the two objects is increased by a factor of 3, the distance between the two objects is increased by 3 times the original distance.

The inverse square law, which states that the force of attraction between two items is inversely proportional to the square of their distance, governs the interaction between two objects. This implies that the power of attraction between the two items weakens as their distance grows. In this case, there is a three-fold increase in the separation between the two items. The inverse square law states that the force of attraction between two objects will drop by a factor of nine if their separation grows by a factor of three. The formula for this is force = k/d2, where d is the separation between the two objects and k is a constant.

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According to the question the resistance of the heater is 3.33 Ω.

The ohm, frequently written as a word and sometimes represented by the capital Greek letter omega, is the unit of resistance that is typically used.The resistance of a line is directly proportional to its diameter if the temperature and many other physical factors remain constant. It indicates that if the length increases, the resistance does too; conversely, if the length decreases, the resistance also decreases.

as we know that,

V = IR

I = 4.2A

V= 14 v

R = V/I

= 14/4.2

= 3.33 Ω

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The resultant velocity of Freda flyer would be 90 km/h. A sector's headwind may become its tailwind, and conversely.

Tailwind is wind blowing from behind the aircraft. It reduces the lift and aircraft generally avoid taking off or landing in tailwind. A tailwind is wind that is blowing toward the back of the plane. Aircraft often stop taking off or flying in headwinds because it lowers lift. Aside from this, airplanes like tailwinds since they propel planes faster, which saves time and fuel. Crosswind is defined as wind blowing from an aircraft's side.

Tailwinds are elements and situations that contribute to growth or have favorable effects on earnings and sales. Headwinds are elements or occurrences that hinder growth or have a negative impact on revenues and revenue.

This can be calculated by subtracting the headwind velocity (10 km/h) from the original velocity (100 km/h).

Resultant velocity = Original velocity - Headwind velocity

Resultant velocity = 100 km/h - 10 km/h = 90 km/h

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The number of revolutions the tire makes during this motion is 94 revolutions.

The distance travelled by the tire is calculated by applying the following kinematic equation.

s = [ ( u + v ) / 2 ] x t

where;

s = [( 0 + 20 ) / 2 ] x 9.3

s = 93 m

The number of revolutions of the tire is calculated as follows;

1 rev = 2πr

where;

N (2πr) = 93 m

N = 93 / 2πr

N = (93) / ( 2π x 0.157)

N = 94 revolutions

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If a person weighs 600 N on Earth, they would weigh less on a planet with a larger radius. The weight of an object is determined by the force of gravity acting on it, and the force of gravity is directly proportional to the mass of the object and inversely proportional to the square of the distance between the object and the center of the planet. As the radius of the planet increases, the distance between the object and the center of the planet increases, which would decrease the force of gravity acting on the object and therefore decrease the object's weight.

It's worth mentioning that the mass of the person would be the same, so their weight would change due to the gravitational force.

The second harmonic frequency of this pitch is 620 Hz.

Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency for clarity and is distinct from angular frequency.

Frequency is measured in hertz (Hz) which is equal to one event per second.

The fundamental frequency of a pipe is determined by the length of the pipe. The frequency of the second harmonic, also known as the first overtone, is twice the fundamental frequency.

So, if the fundamental frequency of the flute is 310 Hz, the second harmonic frequency would be 2 * 310 Hz = 620 Hz.

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This is because capacitance is defined as the ratio of the charge on the plates to the potential difference between them (C = Q / V), and, the potential difference between them remains the same.

The potential difference between the plates remains the same as the distance between the plates increases. This is because the potential difference between the plates is determined by the battery and not affected by the distance between the plates.

(c) The electric field between the plates decreases as the distance between the plates increases. This is because the electric field is the force per unit charge, and it is inversely proportional to the distance between the plates. As the distance between the plates increases, the electric field decreases.

(d) The electric potential energy stored by the capacitor decreases as the distance between the plates increases. This is because the electric potential energy stored by the capacitor is given by the equation U = 1/2 * C * V^2, and as the distance between the plates increases, the capacitance decreases and the potential difference remains the same. Therefore, the electric potential energy stored by the capacitor decreases.

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The mathematical relationship exists between the wave speed and the density of the medium is that the density of the medium is inversely proportional to the wave speed.

The amount of space a wave covers in a certain amount of time, such as the number of meters it covers in a second, is known as its wave speed. The following equation relates wave speed to both wave frequency and wavelength: Wavelength x Frequency = Speed.

Since sound is a mechanical wave, it moves through a medium by being compressed and rarefied. In an elastic medium, its velocity is proportional to the square root of the tension present. More elasticity in the medium results from higher density, which also increases the ease with which compression and rarefaction can occur. In this manner, the density increases while the sound velocity increases.

As a result, the square root of the medium's density and the velocity of sound in that medium are inversely related.

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Potential difference of electron which is moving with speed of 5.00×105 m/s is 0.7109 V and Initial kinetic energy is 11.375 × 10∧-20 eV

Potential difference, also known as the external effort required to move a charge from one position to another in an electric field, is said to be the difference with in energy which electric charges have between 2 points in a circuit. Volts are used to measure it. Voltage is another name for potential difference (Pd. ), which is measured in volts (V).

Given -

Speed of electron = 5.00×105 m/s

We know that

K.E = e × V

Potential difference = K.E / e

= 11.375 × 10∧-20 / 1.6 × 10∧-19

= 0.7109 V

Initial kinetic energy = 1/2 ×m × v²

= 1/2 × 9.1×10∧-31 × (5×10∧5)∧2

= 11.375 × 10∧-20 eV

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The initial velocity of jumping flea as it leaves the ground is 2.65[tex]\frac{m}{s}[/tex] and the time that it hits the ground is 0.542s.

The flea jumps with some initial momentum and ascends to its highest point under the influence of gravity.

The Newton's equations of motion can be used to calculate the flea's initial velocity.

By changing the initial velocity value in Newton's equation of motion, it is possible to calculate how long it takes a flea to reach its maximum height.

The time it takes a flea to go to the ground will be twice as long as the time it takes to get to its highest point.

The relationship between velocity, distance, and time of a motion with constant acceleration is described by Newton's equations of motion. The following are the three motion equations:

[tex]y-y_{o}=ut+\frac{1}{2}at^{2}[/tex]

Now putting the values of all variables find the initial velocity u

u=[tex]\sqrt{2(9.8)(0.360)}[/tex]

On solving we get,

u=2.65[tex]\frac{m}{s}[/tex].

Now using,

v=u+at

find the value of t

t=[tex]\frac{0-2.65}{-9.8}[/tex]

t=0.271s

and as the actual time is double of this time

So, time is 0.542s.

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The maximum volume of the box is 24 cm^3 when the side length of the corner squares is x = 3/2 cm.

What is volume?

Volume is a measure of the amount of space occupied by a three-dimensional object. It is a scalar quantity and it has units of length cubed, such as cubic meters (m³), cubic centimeters (cm³) or cubic inches (in³). The volume of an object can be calculated by multiplying its three dimensions: length, width, and height (or depth).

To find the maximum volume of the box, we can use calculus to find the critical points of the volume function.

First, we need to express the volume of the box in terms of the side length x. The volume of the box can be found by subtracting the volume of the four corner cubes from the volume of the entire card.

The volume of the entire card is 69x and the volume of each corner cube is x^3.

Therefore,

V = (69x) - 4(x^3)

Now, we can use the first derivative test to find the critical points of the volume function.

dV/dx = 54x - 12x^3

Setting dV/dx equal to zero and solving for x, we get x = 3/2.

Now, we can substitute this value of x back into the volume function and find the maximum volume of the box.

V = (69(3/2)) - 4((3/2)^3) = 27 - 4(27/8) = 27 - 3 = 24

Therefore, the maximum volume of the box is 24 cm^3 when the side length of the corner squares is x = 3/2 cm.

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Impulse refers to the measure of momentum.

What is impulse?

Impulse is a measure of the change in momentum of an object, and it is given by the product of force and time for which the force is applied. Mathematically, impulse is represented as the integral of force with respect to time. The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object. This means that the impulse is equal to the final momentum minus the initial momentum of the object.

As used in the sentence "The impulse applied to the ball by the racket can be calculated using the impulse-momentum theorem," impulse refers to the fourth meaning of the word as described in your question.

Specifically, it refers to a measure of momentum, which is the product of an object's mass and velocity. In this context, impulse is a vector quantity that is equal to the change in momentum of an object resulting from a force applied over a certain period of time.

The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object, and it is used in mechanics to calculate the effect of forces on moving objects.

Hence, Impulse refers to the measure of momentum.

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The ramp is not safe. Making the height up to 14.25 will make the ramp safe.

Given:

Incline angle = 85.5 degrees

Let's assume the steep angle is α. For a safe ramp, the angle should be:

Tanα = 15/95

Tanα = 3/19

Tanα = 0.158

α = Tan⁻¹(0.158)

α =  8.98°

Since the given angle is less than a steep angle,

8.98°  >  8.5°  

Hence, the ramp is not safe.

Dimensions for ramp to be safe:

Tan (8.5) = 0.15

Making the height up to 14.25 will make the ramp safe.

Hence, the ramp is not safe. Making the height up to 14.25 will make the ramp safe.

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The  work is done by each of the ropes and gravity are 6375 Joules and 12750 Joules respectively during lowering the piano.

The mass of piano that has to be lift up is 255 kg.

The ropes has to lower the piano till height of 5 M from a second story window to the ground.

The work done during lowering the piano should be,

W = MgH

W is work done,

M is the mass,

g is the gravitational acceleration,

H is the height.

Putting values,

W = 255×10×5

W = 12750 Joules.

The work done by each rope will be 6375 Joules.

The work done by gravitation force will be 12750 Joules.

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The highest and most positive movement of the string, in cm, is always 25 cm.

A transition in an object's motion is referred to as displacement. It has a magnitude and the direction and is a vector quantity. An arrow going from the starting point to the finishing point serves as its symbol .An object's position changes, for example, if it moves from position A to position B.

Displacement is the vector shift between an object's starting and ending coordinates. It's possible that the distance this same thing has traveled is significantly different from that. Velocity is the rate at which displacement changes over time

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(1) The primary different between Bill Nye's solar system model and the Second Life Model is the use of a realistic scale to depict the relative sizes and separations of the planets in Bill Nye's model.

(2) A project by designer and artist Josh Worth serves as an example. Its name, "If the moon were only one pixel," accurately describes what it does. The moon (3474.8 km) occupies the entire pixel, and the rest of the solar system is scaled down to fit. It turns out that most of the time, space is just that—space.  

All of the planets in Bill Nye's model are in a straight line, and it's quite realistic. Although Bill Nye's scale is more precise than this one, the second life model demonstrates how the planets orbit the sun, the spin of their axes, and other things. However, this model is not fully accurate.

"If the Moon Were 1 Pixel" is an infographic by designer Josh Worth. The interactive infographic precisely measures out our solar system using pixels and lets users scroll around space as if they were a spacecraft pushing its boundaries.

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The volume of a gas will decrease by half if the pressure is doubled while the temperature remains unchanged.

Boyle's Rule

The volume is inversely proportional to the pressure for a fixed mass of gas at a constant temperature.

That implies that, for instance, doubling the pressure will result in halving the volume. The volume will decrease ten times as quickly as the pressure does.

This can be mathematically stated as pV = constant.

The number of moles, n, remains constant since the mass of the gas is fixed.

The gas constant, R, is a constant that never changes.

The constant state of the temperature is required by Boyle's Law.

Boyle's Law, which we just stated is a result of, states that everything on the right-hand side of the equation pV = nRT is constant, and as a result, pV is constant.

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If the string was wound around the back axle of mousetrap car forwards instead of backward, the car would not move.

Motion is the change in a body's orientation or position over time. Every single thing in the universe is constantly in motion, including humans and animals.

This is because Newton's Third Law states that for every action, there is an equal and opposite reaction. In the case of a mousetrap car, the action is the force exerted by the string on the back axle as it unwinds, and the reaction is the force exerted by the back axle on the string, propelling the car forward.

If the string is wound around the axle forwards, the direction of the force exerted by the string on the axle will be opposite to the direction of motion, canceling out the propelling force and preventing the car from moving.

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Among the four given diagrams, the fourth one (d) is observed to be correct one used to solve the problem.

The true direction of an unknown current or emf is frequently unknown in advance, but this is irrelevant. Your calculations will produce a result with a negative sign if the actual direction of a given quantity differs from your assumption.

The conservation of charge is used to apply Kirchhoff's first rule to a junction. Charge is conserved, and current is the flow of charge. So, whatever charge flows into the junction must flow out. It is also known as junction law.

The question is incomplete. The complete question has four different diagrams in the attachment below.

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9.8 m/s   will be speed of rocket after fuel has burned.

Let m1 be the mass of the rocket, m2 - the mass of burned fuel.

V1 - velocity of the rocket after the fuel has burned,

V2 - average velocity of burned fuel.

According to the law of conservation of linear momentum  :

0 = m₁V₁ - m₂V₂

V₁ = V₂m₂/m₁

V₁ = 9.8 m/s

The conservation of linear momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion.

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Yes, there are components of the velocity that are not determined by the measurement of the force.

What is velocity?

Velocity is a vector quantity that describes the rate of change of an object's position in a specific direction. It is defined as the displacement (change in position) of an object per unit time. The units of velocity are typically meters per second (m/s) or kilometers per hour (km/h). Velocity can also be represented by a vector arrow pointing in the direction of motion, with the magnitude of the arrow representing the speed of the object.

Yes, there are components of the velocity that are not determined by the measurement of the force. This is because the force experienced by a charged particle in a magnetic field is perpendicular to the velocity of the particle. So, the force measurement only provides information about the component of the velocity that is perpendicular to the direction of the magnetic field. The other component(s) of velocity, which is parallel to the magnetic field, cannot be determined from the force measurement alone.

To calculate the scalar product U dot B, you would need to know the velocity vector U. Without this information, it is not possible to calculate the scalar product.

The angle between U and B can be calculated using the formula:

theta = acos((U dot B) / (|U| x |B|))

where theta is the angle in degrees, U dot B is the dot product of the vectors U and B, and |U| and |B| are the magnitudes of the vectors U and B respectively.

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