The colour that is LEAST affected by diffraction is: O a. Yellow O b. Green O c. Violet O d. Red

Answer:

10.2 kg

Explanation:

Assuming the object is on Earth:

w = mg

m = w / g = 100 / 9.81 = 10.2kg

Answer:

The magnetic pull strength is measured by using the calibrated scale and a ferrous test piece to determine the breakaway force, typically measured in pounds or ounces. (I don't take credit for this answer)

Explanation:

Answer:

No

Explanation:

An electric fan is turned off, and its angular speed decreases uniformly from 720 rev/min to 200 rev/min in a time interval of period 3.25.

In mechanics, acceleration is the price of trade of the rate of an item with recognition to time. Accelerations are vector quantities. The orientation of an item's acceleration is given by means of the orientation of the internet force performing on that item.

According to Newton's second regulation of movement, the acceleration of an object equals the internet force performing on it divided via its mass, or a = F m . This equation for acceleration can be used to calculate the acceleration of an object while its mass and the internet force appearing on it are regarded.

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The correct statement according to the law of reflection is (c) the angle of reflection from a mirror equals the angle of incidence.

The law of reflection states that when a wave (such as light) strikes a smooth, reflective surface like a mirror, the angle at which the wave is incident (incoming) to the surface is equal to the angle at which it is reflected (outgoing). This principle applies to both the angles, which are measured with respect to an imaginary line called the "normal," which is perpendicular to the surface of the mirror at the point of incidence.

The law of reflection governs how waves, including light, interact with reflective surfaces, such as mirrors. It states that the angle of reflection equals the angle of incidence, ensuring a predictable and consistent behavior of the waves as they bounce off the surface.

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Answer:

Netball is a ball sport for two teams of seven players it's rules are published in print and online by the international netball federation Games are played on a rectangular court divided into thirds with a raised goal at coach short end

Explanation:

It will help you

To calculate the time it takes to stop, we need to find the angular acceleration and the initial angular velocity, and then use the equation ωf = ωi + αt, where ωf is the final angular velocity (0 in this case), ωi is the initial angular velocity, α is the angular acceleration, and t is the time.

1. Calculate the torque (τ) exerted on the object: τ = force × radius
τ = 250 N × 1.25 m = 312.5 Nm

2. Determine the moment of inertia (I) of the object. This information is missing in the question, so we cannot proceed without it. Let's assume I is given as I = k kg*m² (where k is a constant).

3. Calculate the angular acceleration (α) using τ = Iα:
312.5 Nm = k kg*m² * α
α = 312.5 Nm / (k kg*m²)

4. Find the initial angular velocity (ωi). This information is also missing in the question. Let's assume ωi is given as ωi = j rad/s (where j is a constant).

5. Use the equation ωf = ωi + αt to find the time (t):
0 = j rad/s + (312.5 Nm / (k kg*m²)) * t
t = - (j rad/s) / (312.5 Nm / (k kg*m²))

Without the values of the moment of inertia (I) and initial angular velocity (ωi), we cannot provide an exact answer for the time (t) it takes for the person to stop the object. Please provide the missing information to proceed further.

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The abstract for a science project regarding the frequency of guitar strings is given below

This science project  is one that seeks to explores the relationship between the length of a guitar string and the wavelength of the elemental tone it produces when culled.

The recurrence of a guitar string is seen as part on its length, pressure, and mass. This extend tells that shorter strings will create a on a very basic level higher tone.

Hence An electronic tuner was said to be utilized to record the recurrence of each note played. The comes about appeared that the elemental tone delivered by each string was higher when the string got to be shorter and more slender.

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According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.

Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.

The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .

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Answer:

D. All of the above

Explanation:

Because it's the most logical answer.

Bus topology has the inherent weakness of a single point of failure.

The topology that has the inherent weakness of a single point of failure among the options provided is the bus topology. In a bus topology, all devices are connected to a single cable, which acts as the backbone of the network. If this central cable fails, the entire network will go down, making it a single point of failure.

In a mesh topology, each device is connected to several others, providing redundancy in case of failure. A hybrid topology is a combination of two or more topologies and can be designed to eliminate single points of failure.

Hence the correct option will be bus topology.

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The electric potential at the center of an electric dipole with two charges, each having a magnitude of 2c, is zero due to the cancellation of the potential contributions from the positive and negative charges.

The electric potential at the center of an electric dipole depends on the distance between the charges and their magnitudes. In this case, we have a dipole with two charges, each having a magnitude of 2c.

The electric potential at the center of a dipole can be determined by summing the potentials due to each charge. Since the two charges have the same magnitude and opposite signs, the potential contributions will cancel each other out at the center.

The formula for the electric potential due to a point charge is given by V = kq/r, where V is the potential, k is the electrostatic constant (\(k = 8.99 \times 10^9 \, \text{Nm}^2/\text{C}^2\)), q is the charge, and r is the distance from the charge.

Since the charges are located symmetrically on opposite sides of the center, their distances from the center are equal. Let's call this distance d.

The electric potential due to the positive charge (2c) at the center is \(V_1 = k(2c)/d\), and the potential due to the negative charge (-2c) at the center is \(V_2 = k(-2c)/d\).

When we add these potentials together, we get:

\(V_{\text{total}} = V_1 + V_2 = \frac{k(2c)}{d} + \frac{k(-2c)}{d}\)

= (2kcd - 2kcd)/d

= 0

Therefore, the electric potential at the center of an electric dipole, where each charge has a magnitude of 2c and distance d, is zero. This means that the contributions from the positive and negative charges cancel each other out, resulting in no net potential at the center.

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Answer:

the size, length, or amount of something, as established by measuring.

Explanation:

Answer:

Explanation:

perfect drawing

Answer:

370N

Explanation:

We can use the formula [ f = mg ] to solve.

f = (100)(3.7)

f = 370N

Best of Luck!

Answer:

The number of turns is  \(N  = 1750 \ turns \)

Explanation:

From the question we are told that

  The inner radius is \(r_i =  12.0 \  cm  =  0.12 \  m\)

   The outer radius is  \(r_o =  15.0 \  cm  =  0.15 \  m\)

   The current it carries is \(I =  1.50 \  A\)

    The magnetic field is  \(B  =   3.75 mT = 3.75 *10^{-3} \  T\)

   The distance from the center is \(d =  14.0 \ cm  =  0.14 \  m\)

Generally the number of turns is mathematically represented as

    \(N  =  \frac{2 *  \pi  * d  *  B}{ \mu_o *  r_o }\)

Generally  \(\mu_o\) is the permeability of free space with value  

    \(\mu_o  =  4\pi * 10^{-7} \ N/A^2\)

So

  \(N  =  \frac{2 *  3.142   * 0.14 *  3.75 *10^{-3} }{ 4\pi * 10^{-7}  * 0.15  }\)

  \(N  = 1750 \ turns \)

Be sure to adhere to all safety precautions while performing the test, such as wearing protective gear, being cautious of the surroundings, and working in teams.

Ensure that you have obtained the necessary permits and permissions from relevant authorities to test the water at the reservoir. Be sure to adhere to all safety precautions while performing the test, such as wearing protective gear, being cautious of the surroundings, and working in teams.

Before leaving for the dam, planning is essential. It will allow you to test the water quality in a systematic and thorough way. The following are some important aspects that must be considered:

Test Equipment Selection - Choose suitable test equipment to test the water quality at various depths. This equipment must be calibrated, cleaned and checked for accuracy prior to testing. Also, take spare parts or additional equipment just in case something happens.Time and Duration - The testing time and duration should be planned to take into account all factors that may affect the test. This includes the weather, time of day, depth of the water and other environmental factors.

Depending on the location, the test should be done during the same period to ensure consistency.

Transportation - Make sure that the test equipment is safely transported and can be easily moved around the test site. Consider factors like access points, terrain, and the distance from the test site to the base. Make sure you take enough fuel for transportation.

Test Plan - Develop a test plan that outlines the testing procedure, test objectives, testing schedule, and personnel requirements. This plan will be your guide to ensure that the testing is done properly and within a specific time frame.

Record Keeping - During the test, record the data from all the measurements taken. Record-keeping is crucial for future analysis and comparisons. It is also important to have a detailed map of the site to track the exact location of each measurement taken.

Finally, ensure that you have obtained the necessary permits and permissions from relevant authorities to test the water at the reservoir. Be sure to adhere to all safety precautions while performing the test, such as wearing protective gear, being cautious of the surroundings, and working in teams.

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Answer: There is nothing here

Explanation: Could you please add a picture or something

The length of the pendulum on the moon is 26.66 times the acceleration due to gravity on the moon.

Let's assume the length of the pendulum on the moon to be Lm.Length of the pendulum on the Earth, Le = 4.44 m

Gravitational acceleration on the Earth, ge = g

Gravitational acceleration on the moon, gm = (1/6) * g

According to the given data, we can write:

T(moon) = T(earth)⇒ `2π * √(Lm/gm)` = `2π * √(Le/ge)`⇒ √(Lm/gm) = √(Le/ge)⇒ √(Lm/(1/6)g) = √(4.44/g)⇒ √(Lm/g) = √(4.44/(1/6))⇒ √(Lm/g) = √(4.44 * 6)⇒ √(Lm/g) = √(26.64)⇒ √(Lm/g) = 5.16⇒ Lm/g = 5.16² = 26.66⇒ Lm = 26.66g

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A monochromatic laser is responsible for exciting hydrogen atoms from their n=2 state to their n=5 state in which :

wavelength λ of the laser =435 nm

longest wavelength = λmax = 4052 nm

shortest wavelength = λmin= 95 nm

To do excitation, the energy of the laser should be greater than or equal to the energy of transition of the hydrogen atom.

In this case, the states of energy are explained by the Bohr model.

       En = -  13,606 /n²    [eV]

therefore the energy of the transition is

         ΔE  =  E 5 -  E2

         ΔE  =  13.606  (1  n2^2  -  1  n5^5 )

        ΔE  =  13.606(1 /2^2   -  1 /5^5).

        ΔE =    2,85726 eV

Using the Planck's equation

         E   =   h f

  Light’s relation to wavelength and frequencies

       c = λ f

       f = c /λ

  λ = h c / E

reducing energy to the SI system

     E  =  2,85726  eV    (1.6x10⁻¹⁹  J /1 eV)   =   4.5716 x 10⁻¹⁹   J

hence,  λ =  6,626 x 10⁻³⁴  3 x 10⁸ /4  ,5716 x 10⁻¹⁹

      λ   = 4.348x 10⁺⁷ m (10⁹ nm / 1 m)

      λ   = 435   nm

photon emission [e] , to the base state n = 1,  from n = 5.

Initial  state,  n = 5

final  state,    n = 4

ΔE = 13.606 (1/4² - 1/5²)

ΔE = 0.306 eV

λ =h c / E

λ = 4052  nm

n = 5

final /  level          ΔE (eV)     λ (nm)

  4                 0.306      4052

  3               0.9675     1281

  2                 2,857       435

  1               13.06           95

 n = 4

 3                 0.661        1876

 2                                    2,551         486

 1                 11,905       104

n = 3

 2                1.89            656

 1                                 12.09         102.5

n = 2

1                 10.20         121.6.

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Answer:

A

Explanation:

When a pencil is partially submerged in a glass of water, it appears broken or offset due to the refraction of light. Refraction occurs when light passes through a medium with a different density than the one it was previously in, such as air and water. This causes the light to bend and change direction, resulting in the pencil appearing differently than it actually is.

The light that enters the water from the submerged portion of the pencil is refracted towards the normal (the imaginary line perpendicular to the surface of the water), while the light that enters the air from the exposed portion of the pencil is refracted away from the normal. This causes the image of the pencil to appear broken or offset at the water-air interface.

The degree of the bend depends on the angle of incidence and the refractive index of the medium. Hence, the amount of refraction varies with the thickness of the water column, making the pencil look even more broken or offset when viewed from different angles.

In conclusion, the illusion of a broken or offset pencil in water is caused by the refraction of light at the interface between water and air.

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Answer: Echolocation

Explanation:

Answer:

F. 0J

Explanation:

At the objects highest point in the trajectory the KE = 0 since this trajectory is completely vertical with no x-component but its PE would be greatest at this point.

KE = (1/2)mv²

KE = 0; because velocity equals 0

PE = m*g*h

PE = 1kg*(9.81m/s^2)*10m

PE = 98.1J

A minimum of 48 of the 120 W lightbulbs must be connected in parallel to the 210 V household circuit in order to trip a 27.0 A circuit breaker.

To determine the minimum number of 120 W lightbulbs that must be connected in parallel to trip a 27.0 A circuit breaker, we need to calculate the total power consumption of the lightbulbs and compare it to the maximum power the circuit breaker can handle.

The power (P) of a lightbulb is given by P = V * I, where V is the voltage and I is the current.

Given:

Power per lightbulb (P) = 120 W

Voltage (V) = 210 V

Circuit breaker current (I) = 27.0 A

To calculate the current consumption of a single lightbulb, we rearrange the power equation:

I = P / V

I = 120 W / 210 V

I ≈ 0.571 A

Now, to determine the minimum number of lightbulbs, we divide the circuit breaker current by the current consumption of a single lightbulb:

Number of lightbulbs = Circuit breaker current / Current per lightbulb

Number of lightbulbs = 27.0 A / 0.571 A

Number of lightbulbs ≈ 47.24

Since the number of lightbulbs must be a whole number, we round up to the nearest whole number:

Number of lightbulbs = 48

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A "constant" is a parameter that stays the same regardless of the variables. One parameter that is held constant is the particular condition.

In general, a parameter is any feature that aids in describing or categorizing a certain system (meaning an event, project, object, situation, etc.). In other words, a parameter is a component of a system that is crucial or useful for identifying the system or assessing its functionality, status, or other characteristics.

In some fields, such as mathematics, computer programming, engineering, statistics, logic, linguistics, and electronic music production, the term "parameter" has more precise definitions.

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Answer: 1 - Independent, 2 - Dependant, 3 - applied force :)

Explanation: Source - Trust me bro

Answer:

H = 1/2 g t^2          time t for an object to fall a distance H

t = (2 H / g)^1/2 = (2 * 45 / 9.80)^1/2 = 3.03 sec for the key to fall 45 m

V = 12 m / 3.03 m/s = 3.96 m/s

Answer:

An electrically polarized object can carry no net charge

Example: charge Q at +x   and charge -Q at -x        for no net charge

An electrically charged object has a net charge on the object