Wy is it necessary to reduce the voltage to a motor when the frequency is reduced?

there will be

a)Aforce of attraction

The time period of an object of mass M attached to a spring with spring constant "k" can be given by the equation:

T = 2π√(M/k)

A) Horizontally: In this case, the gravitational field strength 'g' does not affect the time period of the system. The equation for the time period remains the same:

T_horizontal = 2π√(M/k)

B) Vertically: When the object is attached to the spring vertically, the gravitational field strength 'g' does come into play. However, it does not affect the time period of the system. The equation for the time period still remains the same:

T_vertical = 2π√(M/k)

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Answer:

yes

Explanation:

banked curve :

is a road that looks like the top part of a race track

its looks elevated

often seen in bicycle race track (velodrome)

Banking the curve can help keep cars from skidding. When the curve is banked, the centripetal force can be supplied by the horizontal component of the normal force.

sfuca

The refractive index of the mystery substance is n2 = 2.17.

Refractive index is a physical quantity that describes how light interacts with a particular material. It is defined as the ratio of the speed of light in a vacuum to the speed of light in the material. Refractive index is an important factor in optics, as it determines how much light is bent or refracted when it enters a material, and the angle at which it is refracted. Refractive index is also used to measure the thickness of a material or to calculate the index of refraction of a material. It is also used to determine the refractive properties of gemstones, for example in gemology.

The refractive index of the mystery substance (n2) can be calculated using Snell's law, which states that n1*sin(01) = n2*sin(02).
Therefore, n2 = n1*sin(01)/sin(02) = 1.33*sin(43°)/sin(22°) = 2.17
This means that the refractive index of the mystery substance is n2 = 2.17.

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The needed force is 3000 N.

Explanation:

Given that,

Mass of car m = 1000 kg

Acceleration \(a= 3 m/s^2\)

We need to calculate the needed force

Using newton's second law

\(F= ma\)

Where,

m = mass

a = acceleration

Put the value into the formula

\(F= 1000\times3\)

\(F= 3000 kg m/s^2\)

\(F= 3000 N\)

Hence, The needed force is 3000 N.

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Answer:

1.A

2.E

3.C

4.i think A

Explanation:

Answer:

The correct option is (c).

Explanation:

When an object tied to a rope and we rotate it, the centripetal force acting on it. This force acts towards the center of the circle. The magnitude of the force is given by :

\(F=\dfrac{mv^2}{r}\)

Where,

m is mass, v is speed and r is radius of path

If the length of the rope is increased, it means it will make a large circle i.e. large radius.

As we can see that force is inversely proportional to the radius of circle. It means less force is required because the force is inversely proportional to the radius of the circular orbit. Hence, the correct option is (c).

To move an object at a constant speed after increasing the length of the rope, less force is required because the force is inversely proportional to the radius of the circular orbit. Thus option C is correct.

The force applied to the object moving in a circular motion can be given by:

\(\rm Force\;=\;\dfrac{mass\;\times\;(speed)^2}{radius}\)

From the equation, it is evident that force has been inversely proportional to the radius of the circular path. Since the length of the rope is doubled, the radius the circular path has also been doubled.

If we apply the same unit of force, the speed of the motion will increase, as speed has been directly proportional to the force applied.

Thus, to maintain the object at a constant speed, the force applied to the object has been reduced.

So, in order to move an object at a constant speed after increasing the length of the rope, less force is required because the force is inversely proportional to the radius of the circular orbit. Thus option C is correct.

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the force between the two wires if they are separated by 2.50 cm is 0.525 N.

Given that force F between two parallel wires carrying electric currents is inversely proportional to the distance d between the wires and that a force of 0.750 N exists between wires that are 1.75 cm apart and that we are supposed to find the force between them if they are separated by 2.50 cm.

Let the initial force be F₁ and the initial distance be d₁.

Therefore, we can write the relationship between force and distance as;

F₁d₁ = F₂d₂

Where

;F₁ = 0.750 N (initial force)

d₁ = 1.75 cm (initial distance)

F₂ = ? (force at new distance)

d₂ = 2.50 cm (new distance)

Let us find F₂;F₁d₁ = F₂d₂F₂ = F₁d₁/d₂

Now substitute the values we know;

F₂ = (0.750 N x 1.75 cm) / 2.50 cmF₂ = 0.525 N

Therefore, the force between the two wires if they are separated by 2.50 cm is 0.525 N.

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Answer:

alright

Explanation:

that's so cool I'll join

The gyroscope slows from an initial rate of 29.6 rad/s at an angular acceleration of 0.54 rad/s2.

Part (a) How long does it take to come to rest in seconds? t = ?

The angular deceleration is given by the negative value of the angular acceleration; thus:

α = -0.54 rad/s2

The initial velocity is given by the value,

ω1 = 29.6 rad/s.

The final velocity, ω2 = 0 rad/s.

The formula for angular acceleration is:

ω2 = ω1 + αt,

where:

ω1 = 29.6 rad/s

ω2 = 0 rad/s

α = -0.54 rad/s

2t = ?

Substitute the values in the formula above and solve for t.

0 = 29.6 - 0.54tt = 29.6/0.54t = 54.8 seconds

Therefore, it takes 54.8 seconds to come to rest in seconds.

Part (b)The number of revolutions that the gyroscope makes before stopping is given by:

n = (ω1/2π)t,

where:

ω1 = 29.6 rad/s

t = 54.8 s

n = ?

Substitute the values in the formula above and solve for n:

n = (29.6/2π)(54.8) revolutions

n ≈ 277.4

Therefore, the number of revolutions that the gyroscope makes before stopping is approximately 277.4 revolutions.

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A chemical reaction between the metals and the electrolyte frees more electrons in one metal than it does in the other.

What is A chemical reaction ?

One set of chemical substances can change into another through a process known as a chemical reaction.

The metal that frees more electrons develops a positive charge, and the other metal develops a negative charge.

Electrical energy is kept in batteries. More work can be accomplished the more energy is saved. On the other hand, power refers to how swiftly energy may be put to use. You can compare energy to water by visualizing it behind a hydroelectric plant's dam.

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Potential energy of the 2-charge system: According to the question, we have two point charges of values +3.4 µC and +6.6 µC separated by 0.20 m. The potential energy of the two-point charge system is 820.41 J.

The formula for calculating the potential energy of the two-point charge system is given by;

U = (kq1q2)/d,

Where; U = potential energy of the system q1 = value of the first point charge

q2 = value of the second point charge,

k = Coulomb's constant = 8.99 × 10^9 Nm^2/C^2

d = separation distance between the two charges

Plugging in the values, we get;

U = [(8.99 × 10^9 Nm^2/C^2)(3.4 µC)(6.6 µC)]/(0.20 m)

U = 820.41 J (Joules)

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Answer:Entropy can be thought of as a measure of the dispersal of energy. It measures how much energy has been dispersed in a process. The flow of any energy is always from high to low. Hence, entropy always tends to increase.

Explanation:

This long-term appointment allows them to focus on the stability and effectiveness of the nation's monetary policy without being influenced by short-term political pressures.

Members of the Federal Reserve Board of Governors are appointed for one 14-year term so that they have time to learn how the Fed operates in detail. This allows them to make informed decisions based on economic considerations rather than political ones. The lengthy term also provides continuity and stability to the Board, as well as insulates it from the political pressures that may arise during election cycles.

                                Therefore, the purpose of the 14-year term is to ensure that the Board can act independently and effectively in managing monetary policy and promoting economic stability.
                                     The Federal Reserve Board of Governors. Members of the Federal Reserve Board of Governors are appointed for one 14-year term so that they can make their decisions based on economic, rather than political, considerations. This long-term appointment allows them to focus on the stability and effectiveness of the nation's monetary policy without being influenced by short-term political pressures.

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Answer:

distance between two points having phase difference 5.6 rad is

Φ = 2.33 m

Explanation:

given

frequency, f = 130Hz

speed of sound in air, v = 340m/s

distance between two crust or through with phase difference 2\(\pi\) = λ (wavelength)

phase difference = 5.6 rad

note: distance between two points having a phase difference = \(\frac{ \lambda }{2\pi }\)

∴ distance between two points having phase difference of 5.6 rad is = \(\frac{ \lambda }{2\pi }\) ×5.6

Recall

v = f × λ

speed = frequency × wavelength

wavelength = speed/frequency

λ  = v/f

λ  = 340/130 = 2.615 m

∴ distance between two points having phase difference 5.6 rad is = \(\frac{ 2.615 }{2\pi }\) ×5.6 = 2.33 m

To find the value of w that will result in a maximum tensile bending stress of 3 ksi, we first need to determine the moment of inertia of the cross-sectional shape of the material in question. Once we have this value, we can use the following formula to calculate the maximum tensile bending stress:

σ = M*c/I

Where σ is the maximum tensile bending stress, M is the bending moment, c is the distance from the neutral axis to the outermost fiber, and I is the moment of inertia.

Assuming that the bending moment is known, we can rearrange the formula to solve for the required value of w:

w = (M*c)/(I*σ)

This will give us the required width of the material to ensure that the maximum tensile bending stress does not exceed 3 ksi. Please note that this is a long answer that requires additional information about the material and the conditions under which it will be used.

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Answer:

there is no drag in a vacuum (why is father in a vaccum)

Explanation:

there is nothing to hit and slow the object other than gravity like dust or air

The ball would be hit if it was hit at an angle of 25° and a velocity of 80 mph, it will travel 1-8m.

The definitiοn οf velοcity is the rate at which a bοdy mοves in a particular directiοn. Velοcity is the rate at which a distance changes in relatiοn tο time. A vectοr quantity with bοth magnitude and directiοn is velοcity.

The amοunt οf matter in a bοdy is referred tο as its mass. The kilοgramme is the kilοgrams, which is the SI unit οf mass (kg). Mass is defined as: Mass = Density/Vοlume.

Therefοre, ball wοuld be hit if it was hit at an angle οf 25° and a velοcity οf 80 mph, it will travel 1-8m.

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Answer:

Ya I guess so lol. (The upcoming and this sentence is pre-written and copy and pasted in every brainly question or comment I write or answer.) If this answer helped you please consider giving it brainliest. If my answer was wrong and you got marked wrong for it, I deeply apologize and hope you will forgive me, since everyone makes mistakes sometimes. If you need me to elaborate on my answer or give further explanation on it, please ask and I will do so. If you need to explain your reasoning on your work feel free to use my words- word for word- without crediting me, the answer was made for you anyways! Hope yall learn from my answer and it helps you in the future with assignments, quizzes, test’s, and more!

- •Trix•

( Yes I know my - •Trix• thingy is not my user but it’s what I would change it to if I could but I can't, please address me as Trix while commenting or talking to me here.)

Tardigrades related to astronomy as they can survive in extreme, harsh environments, including space for long time without oxygen.  The correct option is A , B and C.

A special adaptation that allows the tiny animal known as the tardigrade to curl up into a dry, lifeless ball and survive for decades.

Tardigrades can undergo utter vacuum and intense pressures more than five times as in the deepest ocean. Temperatures up to 300F and as low as -458F is maintained.

They survive in space and for long time for about 10 days. They can live without water for decades.

Thus, the correct option is A , B and C.

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Edwin Hubble studied the Andromeda galaxy and found that it was an individual galaxy and not part of our own milky way is Hubble discovered this by observing a variable star, known as a Cepheid variable, in the Andromeda galaxy and measured its distance from Earth.

The Cepheid variable was used to measure the galaxy's distance because the star's brightness varied predictably, and the brightness was directly related to its distance from Earth. By studying the Andromeda galaxy, Hubble discovered that it was much farther away from Earth than originally thought, and it was actually a separate galaxy rather than a part of the Milky Way.

This discovery proved the existence of other galaxies outside of our own Milky Way, which was a groundbreaking finding at the time and paved the way for modern astronomy. Overall, Hubble's study of the Andromeda galaxy provided significant evidence to support the theory that the universe was much larger than previously thought and made a huge contribution to our understanding of the universe.

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Answer: Attach it to clothing, personal flotation device or the person's person.

Explanation:

This particular Question or problem has to do with the rules and regulations or laws governing the use of Personal Watercraft(PWC) in the state of Florida in the United States of America. Hence, one of the rules that is applicable to the use of boats and waterways or the use of personal watercraft in Florida is that in florida, if ones pwc is equipped with an engine cut-off lanyard the person operating it must ATTACH IT TO THE CLOTHING, PERSONAL FLOATATION DEVICE IR THE OPERATORS' PERSON.

Another rule band the use of flammable personal flotation device with Personal Watercraft(PWC) in the state of Florida. All this rules and guildlines are made to limit or minimize hazards.

The "Analysis" section of a lab report would most likely includes:

In the "Analysis" section of a lab report, it is common to discuss any errors or uncertainties that may have affected the experimental data. This may involve identifying sources of systematic and random errors and discussing their potential impact on the results.

Also, the section would typically describe the dependent and independent variables used in the experiment, providing a clear understanding of the factors being investigated and manipulated. By addressing these aspects, the "Analysis" section helps to evaluate the reliability and validity of the experimental findings.

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Answer:

the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the source of the wave. When the observer is moving towards the source, the waves are compressed and the frequency increases (called a blue shift). Conversely, when the observer is moving away from the source, the waves are stretched and the frequency decreases (called a red shift). This phenomenon can be observed in sound waves, light waves, and other types of waves.

Answer: an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other

Explanation:

A. The exogenous parameter A is the household's relative preference for consumption and leisure. B. The unitary time endowment is the total available time for the representative household. C. The derivatives with respect to c, and l are zeros.

D. 2A√l / √c = W/P. E. n = 1 - [(2/λ)²]. F. Lowering the tax rate on wages support the proposed policy. G. The dominant effect depends on the relative magnitude of the income and substitution effects.

(a) The exogenous parameter A in the household's preference function, u(c,l)=Ac¹/²+l¹/²), represents the household's relative preference for consumption and leisure. It captures the household's subjective valuation of consuming goods and services (c) compared to their enjoyment of leisure (l). A higher value of A implies that the household places a greater emphasis on consumption relative to leisure, indicating a stronger desire for material goods and services.

(b) The unitary time endowment, given by 1 = l + n, represents the total available time for the representative household. It combines the time spent on leisure (l) and the time spent on labor (n). The unitary time endowment indicates that the household has a fixed amount of time available, and they need to allocate it between leisure and work activities. It implies that an increase in leisure time must be accompanied by a decrease in labor time, as the total available time remains constant.

(c) To derive the first-order conditions for consumption (c) and leisure (l), we set up the Lagrangian:

L = Ac¹/² + l¹/² + λ(1 - l - n)

where λ is the Lagrange multiplier associated with the budget constraint.

Taking partial derivatives with respect to c, l, and λ, and setting them equal to zero, we get:

∂L/∂c = A(1/2)c⁻¹/² - λ = 0

∂L/∂l = (1/2)l⁻¹/² - λ = 0

∂L/∂λ = 1 - l - n = 0

(d) The consumption-leisure optimality condition can be derived by equating the marginal rate of substitution (MRS) between consumption and leisure to the wage rate (W) divided by the price level (P):

MRS = (∂u/∂c) / (∂u/∂l) = W/P

Using the partial derivatives from part (c), we have:

(A(1/2)c⁻¹/²) / ((1/2)l⁻¹/²) = W/P

Simplifying, we get:

2A√l / √c = W/P

(e) To solve for the consumption demand function and the labor supply function, we need to express one variable in terms of the other. Let's solve for the consumption demand function first.

From the first-order condition for consumption, we have:

A(1/2)c⁻¹/² = λ

Solving for c, we get:

c⁻¹/² = (λ/A)²

c = (A/λ)²

Now, let's solve for the labor supply function.

From the budget constraint, we have:

1 = l + n

Rearranging, we get:

n = 1 - l

Substituting this expression into the first-order condition for leisure, we have:

(1/2)l⁻¹/² - λ = 0

Solving for l, we get:

l = (2/λ)²

Finally, substituting the expression for l into the labor supply equation, we have:

n = 1 - [(2/λ)²]

(f) To determine whether the labor supply function supports lowering the tax rate on wages as an incentive for households to increase their labor supply, we need to analyze the effect of τ on the labor supply function derived in part (e).

By examining the labor supply function n = 1 - [(2/λ)²], we observe

that a decrease in the tax rate τ would lead to a decrease in the value of λ. Consequently, as λ decreases, the labor supply increases. Therefore, lowering the tax rate on wages would incentivize households to increase their supply of labor, supporting the proposed policy.

(g) The income and substitution effects on labor supply can be analyzed based on the change in the wage rate (W) resulting from the tax rate change (τ). In this case, a decrease in τ would increase the after-tax wage rate (W) received by households.

The dominant effect depends on the relative magnitude of the income and substitution effects. Since the labor supply function n = 1 - [(2/λ)²] is derived from a static model, it does not explicitly capture the substitution and income effects.

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Explanation:

gas vibrate and moves freely at high speeds, liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place

hope it helps you

John always paddles his canoe at a constant speed v with respect to the still water of a river. One day, the river current was due west and was moving at a constant speed that was a little less than v with respect to that of still water.

John decided to see whether making a round trip across the river and back, a north-south trip (in which he paddles in the north/south direction, but doesn't actually travel in either the north or south direction, respectively), would be faster than making a round trip an equal distance east-west. We have to find out the result of John's test.The time for the north-south trip was equal to the time for the east-west trip is the result of John's test.What we can infer from the given problem is that John paddles his canoe at a constant speed v with respect to the still water of a river.

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5

if zero falls between two significant numbers it becomes significant.

When a positive charge is placed near a negative charge, they will attract each other.

Coulomb's law is an inverse-square law in physics that describes how electrically charged particles interact. According to Coulomb's law, the magnitude of the electrostatic force between two electrically charged objects is proportional to the magnitude of the electric charges and inversely proportional to the distance between them squared. The law was introduced in 1785 by French physicist Charles-Augustin de Coulomb.

Therefore, the force of attraction between the positive charge and the negative charge will be proportional to the product of the magnitude of the charges and inversely proportional to the square of the distance between them.

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