Cooper communicates with brand using radio waves of wavelength 300 m. what is the frequency of this wave?

Answer:

about 30 km

Explanation:

about 30 km

The event horizon radius of a non- rotating 10 solar mass black hole is about 30 km.

The correct option is b. closed-loop supply chain

Closed-loop supply chain is designed to optimize both forward and reverse flows.

Businesses recycle their waste volume to make new products in such a closed-loop supply chain. This method of resource conservation and energy conservation is sustainable.

Some characteristics of closed-loop supply chain are-

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The amount of charge built up on your fingertip is approximately 10.08 x 10^-5 C.

The spark length of 2 cm is equal to the breakdown field strength in air, so the electric field strength between your fingertip and the doorknob is 3 x 10^6 N/C.

The electric potential difference between the two points is given by the equation:

V = Ed

Where V is the potential difference, E is the electric field strength, and d is the distance between the two points.

In this case, d is equal to 2 cm, so we can calculate the potential difference:

V = (3 x 10^6 N/C) x (2 cm) = 6 x 10^6 N m/C = 6 x 10^6 V

Next, we can calculate the charge q on your fingertip using the formula:

q = CV

Where C is the capacitance of your fingertip.

The capacitance of a sphere is given by the formula:

C = 4πε_0r

Where C is the capacitance, ε_0 is the permittivity of free space, and r is the radius of the sphere.

The diameter of your fingertip is 1.59 cm, so the radius is 0.795 cm. Plugging these values into the formula for capacitance, we get:

C = 4πε_0 * 0.795 cm = 4π * 8.85 x 10^-12 * 0.795 cm = 1.68 x 10^-11 F

Finally, we can calculate the charge on your fingertip by plugging in the values for q and C into the equation:

q = C x V = 1.68 x 10^-11 F x 6 x 10^6 V = 10.08 x 10^-5 C

So the amount of charge built up on your fingertip is approximately 10.08 x 10^-5 C.

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Answer:

20mA

Explanation:

because it is connected in series with the ammeter

The current through the 40Ω resistor in the given circuit is 20mA, which is explained below.

The volate across resistor R is 1V, as indicated by the voltmeter.

Since the potential of the battery is 3V, according to Kirchoff's voltage law, the voltage drop across 20Ω resistors must be 1V each since they are indentical.

Let a total current I passes through 20Ω resistor as it is connected to the battery in series. From Ohm's law:

20Ω × I = 1V

I = 50mA

Now the current indicated by the ammeter is 20mA which splits according to the reistors of 15Ω and 30Ω which are connected in parallel. Then again the current adds up to 20mA when leaving the set of parallel resistors, through the 40Ω resistor.

So the current through the 40Ω resistor is 20mA

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The three basic types of three-phase motors are :

1. Synchronous Motors

2. Induction Motors

3. Brushless DC Motors

Explanation:

Synchronous Motors: These motors rotate at a constant speed that is synchronized with the frequency of the power supply. They are used in applications where precise speed control is required, such as in electric clocks, timers, and other similar devices.

Induction Motors: These motors are the most common type of three-phase motor used in industrial and commercial applications. They work on the principle of electromagnetic induction and are robust, efficient, and relatively low-cost. Induction motors come in various types, including squirrel-cage, wound-rotor, and double-fed induction motors.

Brushless DC Motors: Also known as electronically commutated motors (ECMs), these motors have a permanent magnet rotor and a stator with multiple windings. They are highly efficient, have low maintenance requirements, and are used in a wide range of applications, including electric vehicles, industrial automation, and robotics.

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After completion of the trip described in the question, it would be the year 2320 on Earth.

This has to do with the way light-years are described. A light-year is in fact not a measurement of time, but of distance. It is how far you would travel in one year if traveling at the speed of light. So since the star is 100 light-years away, it would take 100 Earth years to get there and then 100 more to get back, making the current Earth year 2320.

Therefore, we can confirm that after completion of the trip described in the question, it would be the year 2320 on Earth.

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The thinnest soap film that appears black when illuminated with light with a wavelength of 455 nm is 168.52 Nm

For thinnest soap film,

2 t = λ / n

t = Thickness

λ = Wavelength

n = Refractive index

λ = 455 Nm

n = 1.35

t = 455 / 2 * 1.35

t = 168.52 Nm

Refractive index is the light bending ability of any medium that can bend light. It describes the amount of light refracted when entering the medium.

n = c / v

c = Speed of light

v = Phase velocity of light

Therefore, the thinnest soap film that appears black is 168.52 Nm

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Answer:

u go to vanguard? in 6th grade

Answer:

is it correct ? sorry of it is incorrec

Atoms have no electric charge because they have an equal number of electrons and protons.

Explanation:

So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.

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Answer:

c

Explanation:

gfdschhgfdxcvhgfd

Answer:

\(workdone = force \times distance \\ = 65000 \times 75 \\ = 4,875,000 \: J\)

The density of a substance that can be raised to a column height of 12.3 cm under vacuum by atmospheric pressure is 8.4 × 10⁴ kg/m³.

Density is a measure of how much "stuff" is in a given space. For instance, a block of the heavy element lead (Pb) is denser than the softer, lighter element gold (Au). Styrofoam blocks are less dense than bricks. Defined as mass per unit volume. You can imagine how tightly packed the substance is, how loosely packed, or how compact it is. Solids are generally denser than liquids, and liquids are denser than gases, but there are many exceptions.

It is a physical property defined by mass to volume. Physical properties can be observed without altering the chemical composition of matter. Other physical properties include melting and boiling points. Each substance, element, and compound has a unique density associated with it.

P = ρ × g × h

ρ = P/(g × h)

Where, ρ = Density of the substance

P = Atmospheric pressure (101,325 pa)

g = Gravitational constant (9.8 m/s)

h = Height of the column of substance (12.3 cm)

Now, substitute the values:

ρ = 101,325/(9.8 × 12.3)

ρ = 101,325/120.54

ρ = 83974 kg/m³

ρ ≈ 84000 kg/m³

ρ ≈ 8.4 × 10⁴ kg/m³

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Using Runge-Kutta 2nd order Heun's method, the speed (w) at t = 0.8s is approximately 0.0081.

Given:

Voltage input (V) = 30V

Initial speed (w) = 0

Step size (h) = 0.4s

Time at which speed is to be determined (t) = 0.8s

We need to determine the speed (w) at t = 0.8s using Heun's method.

We have k₁ = f(t₁, W₁) = 0.02 + 0.06w₁ (using the given equation)

At t = 0 and w = 0 (initial conditions), we have:

k₁ = 0.02 + 0.06(0) = 0.02

We have k₂ = f(t₁ + h, w₁ + k₁h) = 0.02 + 0.06(w₁ + 0.02h)

So, at t = 0.4s and w = 0 (initial conditions), we have:

k₂ = 0.02 + 0.06(0.02 * 0.4) = 0.02 + 0.00048 = 0.02048

So, W₂ = w₁ + (k₁ + k₂)(h/2)

   = 0 + (0.02 + 0.02048)(0.4/2)

   = 0.04048(0.2)

   = 0.008096

Therefore, using Runge-Kutta 2nd order Heun's method, the speed (w) at t = 0.8s is approximately 0.0081.

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The complete question is:

The speed of a motor supplied with a voltage input of 30V, assuming the system is without damping, can be expressed as 30 = (0.02)+(0.06)w dt If the initial speed is zero and a step size of h = 0.4 s, determine the speed w at t = 0.8 s by using the Runge-Kutta 2nd order Heun's method. Heun's method: Wi+1=W₁ = w₁ + (-/-^₁ + = -K ₂ ) h where, k₁ = f(t₁, W₁) and k₂ = f(t₁ + h, w₁ + k₁h), the speed (w) at t = 0.8s is approximately 0.0081.

As an object with mass approaches the speed of light, its relativistic momentum increases without bound.

According to special relativity, as an object with mass approaches the speed of light, its relativistic momentum increases without bound.

The relativistic momentum of an object can be calculated using the equation : p = γm0v

Where:

p is the relativistic momentum

γ is the Lorentz factor, given by γ = 1 / √(1 - (v^2 / c^2))

m0 is the rest mass of the object

v is the velocity of the object

c is the speed of light in a vacuum

As the object's velocity (v) approaches the speed of light (c), the term (v^2 / c^2) approaches 1. As a result, the denominator of the Lorentz factor approaches 0, making the Lorentz factor (γ) increase without bound.

Consequently, the relativistic momentum (p) also increases without bound as the velocity approaches the speed of light.

This behavior is in contrast to classical mechanics, where the momentum of an object would approach infinity as its velocity approaches infinity.

However, in special relativity, the speed of light serves as an upper limit, and as an object with mass approaches that limit, its momentum increases indefinitely but never exceeds the speed of light. This is consistent with the principle that nothing with mass can attain or exceed the speed of light in a vacuum.

Thus, the relativistic momentum of an object with mass increases without bound when it approaches the speed of light,

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A modulo-24 counter circuit needs at least five D flip-flops to count up to 24.

A modulo-24 counter circuit needs at least 5 D flip-flops. A D flip-flop, also known as a data or delay flip-flop, is a type of flip-flop that stores the value of the data input.

In a modulo-n counter, the counter's output will change state only when n pulses have been received. In other words, the counter cycles through n states before returning to its original state. For a modulo-24 counter, this implies that there will be 24 states before it repeats the original state.

The state diagram of the modulo-24 counter can be represented as follows:As a result, 24 is equivalent to 11000 in binary. Since there are five digits in 11000, the modulo-24 counter will require at least five D flip-flops.The main answer is that a modulo-24 counter circuit needs at least 5 D flip-flops.

In digital electronics, a counter circuit is used to generate binary numbers using a clock pulse. A counter circuit is a collection of flip-flops that are connected together to form a sequential circuit.

A sequential circuit is a circuit in which the output is dependent on the input and the state of the circuit. There are two types of sequential circuits: synchronous and asynchronous.In synchronous sequential circuits, the output is dependent on the input and the state of the circuit, and the clock is used to synchronize the operation of the flip-flops. The clock pulse controls the operation of the flip-flops.

The flip-flops are triggered at the rising or falling edge of the clock pulse.In asynchronous sequential circuits, the output is dependent on the input and the state of the circuit, but the clock is not used to synchronize the operation of the flip-flops. Instead, the flip-flops are triggered by the output of other flip-flops or external signals.In a counter circuit, the number of flip-flops required depends on the modulus of the counter.

The modulus is the number of states in the counter. For example, a modulus-16 counter has 16 states. A modulus-24 counter has 24 states. A modulus-32 counter has 32 states.A D flip-flop is a type of flip-flop that stores the value of the data input. In a counter circuit, the D flip-flops are used to store the count. The output of the counter is taken from the outputs of the flip-flops.

The conclusion is that a modulo-24 counter circuit needs at least five D flip-flops to count up to 24.

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The fringe shift Δs due to the introduction of any sheet of thickness t and refractive index n in the path of any of the interfering waves is given by, Δs=(n−1)t D/2d which is 5892 Ä.

​Due to the change in the distance of separation between the plane of the slits and the screen, the fringe width is given by  λ×2D/2d

​

According to the statement of the problem,

λ×2D/2d =(n−1) t D/2d

λ=(n−1) t/2

(1.6−1) 1.964×10⁻⁶/2  =5892 Ä

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Raw sewage contains microorganisms that can harm ecological systems as well as make people and animals ill. In addition to bacteria and viruses, raw sewage frequently include germs that are harmful to human health. Additionally, there are additional substances in raw sewage that are just poisonous to fish, shellfish, mammals, and other aquatic life. Consequently, sewage pollution that enters a body of water sets off a negative cascade.

The definition of diversity is the quality of including or consisting of several constituents .The development of workplace diversity models since the 1960s has given rise to a strong commercial rationale for diversity. The initial paradigm for diversity in the United States was based on affirmative action and the equal opportunity employment goals put in place by the Civil Rights Act of 1964. The principle of equal employment opportunity was predicated on the notion that anybody who was intellectually or physically prepared for a particular profession might work toward (and perhaps achieve) getting the stated position without experiencing identity-based discrimination. This compliance-based strategy gave birth to the notion that the only reason a person who was different from the majority group was employed into a corporation was for show.

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Answer:

LOL! couldnt be me either bestieeeee

Answer:

-_-

Explanation:

i dont know What was XD??

Answer:

Inside the guts of a microwave, a device called a magnetron channels electrical energy from a power outlet to a heated filament, creating a flow of electrons that in turn transmits microwaves into the cooking chamber through an antenna

Answer:

Microwaves use radiation as the method of heat transfer.

Explanation:

Radiation refers to heat transfer via electromagnetic waves, such as microwaves. Conduction is heat transfer via direct contact between two objects.

Answer:

from a lesser hight

Explanation:

because you need less force

hope its right if it is mark brainlyest ;)

Answer: The apple is lifted approximately 0.1232 m (rounded to four decimal places).

Explanation: To find the distance the apple is lifted, we can use the formula for work: work = force x distance.

The force required to lift the apple is equal to the weight of the apple, which can be calculated using the formula:

weight = mass x acceleration due to gravity.

we have work = weight x distance, 5.4 J = (0.178 kg x 9.81 m/s^2) x distance.

Solving for distance, we get a distance ≈ of 0.1232 m (rounded to four decimal places).

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In order to avoid injury to driver, The force constant of this spring should be 73.82 N/m

Calculation of force constant to this spring:

Here  

vertical drop is 15 m.

mass of the car, m= 113 kg

gravitational acceleration, g= -9.8 m/s^2

spring compression before car stops, x= 3.0 m

In order to avoid injury to the driver,

we need to use Hooke's law and Newton's second law:

F(net) = F(x)

m*a=-k*x

here a=g

k= -(m*g) / x

here k is force constant of this spring

substituting the values we get,

k = -(113* -9.8) / (15)

k = 73.8266 N/m

Hence,  the force constant of this spring should be 73.82 N/m

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Answer:

The Force between the two charges is an attractive force of 16,000N

Explanation:

Expression for the electric force between the two charges is given by

F = (k*q1*q2) / r^2

Here, k = constant = 9 x 10^9 N*m^2 / C^2

q1 = - 2.0x10^-4C

q2 = + 8.0x10^-4C

r = 0.30 m

Substitute the given values in the above expression -

One charge  is + and the other is a -, therefore the net force is an attractive force (opposites atract)

The attraction force is:

F= 9.0x10^9 * 2.0x10^-4 *8.0x10^-4 N/ 0.30^2

F= 16,000N

The force between the two charges will be 16,000 N.It is the force exerted by one charge on another charge.

The electric force between the two charges is directly propotional to the product of the charge and inversly propotional to the square of the distance between them.

The given data in the problem is;

q₁ is the megnitude of charge 1= - 2.0x10⁻⁴ C

q₂ is the megnitude of charge 2 = + 8.0x10⁻⁴ C

k is the propotionallity constant = 9 x 10⁹ Nm² / C²

r is the seperated distance = 0.30 m

F is the electric force=?

The electric force is found as;

\(\rm F = \frac{K q_14q_2}{r^2} \\\\ \rm F = \frac{9 \times 10^9 \times 2.0 \times 10^{-4}}{(0.30)^2} \\\\ \rm F = 16,000N\)

Hence the force between the two charges will be 16,000 N.

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Answer:

F = v / λ

 = 343 / 4.28

 = 80.1 Hz

Explanation:

The formula connecting wavelength, frequency and speed is F = v / λ, where frequency is represented by F, speed represented by v and wavelength represented by λ. This applies to mechanical waves, which include both sound waves and electromagnetic waves.

The  central bright fringe and the 2nd order dark fringe on the screen are 9.41 X 10^(-4) m apart.

The distance of the first dark fringe from the central bright spot will be equal to the width of the fringe.

Fringe width = λL /w

where λ is the wavelength of light, w is the slit width, and L is the distance of the screen.

So required distance

= \(\frac{670 * 10^{-9} * 1.25 }{0.89 * 10^{-3}}\) m

= 9.41  X  10^(-4) m

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Explanation:

Objects like apples, wood, and sponges are less dense than water. They will float. Many hollow things like empty bottles, balls, and balloons will also float. That's because air is less dense than water.

When the crest of one wave passes through the trough of another wave, destructive interference takes place.

The crest and trough of a wave, respectively, are its highest and lowest surface portions. The wave height is the vertical distance between the peak and trough. The wavelength is the horizontal separation between two consecutive crests or troughs.

When the crest of one wave passes through the trough of another wave, interference takes place.

This interference can be constructive, where the amplitudes of the waves add up, resulting in a larger wave, or destructive, where the amplitudes of the waves cancel out, resulting in a smaller wave or no wave at all.

The type of interference that occurs depends on the relative amplitudes, wavelengths, and phases of the two waves.

Therefore, destructive interference takes place when the crest of one wave passes through the trough of another wave.

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According to given question the speed of the arrow as it leaves the bow is 41.32m/sec.

The definition of force in physics is: This push or draw on a massed object changes its velocity. An unseen factor is an agency that has the power to alter the resting or movement condition of a body. It has both a trajectory and a size.

There are several instances of energies in daily life, including: heft and drive (i.e. the weight of something) is force a swing applies to a ball. the pressure that a hair applies to hairs when stroking it. the pressure your foot applies to the pedal whenever you're riding your bike.

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