multimode fiber is capable of longer transmission distances than single mode fiber.

The Wright brothers used skids instead of wheels on the Wright Flyer.

The Wright brothers designed the Wright Flyer with skids to enable the aircraft to take off and land on the soft sand at Kitty Hawk, North Carolina. Skids provided a stable and smooth contact surface for takeoff and landing without the need for a complex wheel system.The Wright Flyer, the first successful powered aircraft built and flown by the Wright Brothers, had skids attached to its landing gear. These skids, made of wood and covered with fabric, served as the primary means of supporting and landing the aircraft. The skids allowed the Flyer to glide along the ground during takeoff and landing, providing stability and control. The absence of wheels was due to the Wright Brothers' design choice and the conditions of the early aircraft they developed.

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Answer:

D

Explanation:

Hope this helped

A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced upwards and downwards. In this case, the particles of the medium move perpendicular to the direction that the pulse moves. This type of wave is a transverse wave. Transverse waves are always characterized by particle motion being perpendicular to wave motion.

A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil left and right. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced leftwards and rightwards. In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.

As the stapes bone vibrates against the oval window, it creates pressure waves that propagate through the fluid-filled cochlea of the inner ear.

These pressure waves are the initial stimulus for the process of hearing. The oval window is connected to the cochlea, which is a spiral-shaped structure responsible for converting sound waves into electrical signals that can be interpreted by the brain.

When the oval window moves in response to the vibrations of the stapes, it creates a pressure disturbance in the fluid within the cochlea. This disturbance travels through the cochlear fluid, causing the basilar membrane (a thin membrane running along the length of the cochlea) to vibrate. The basilar membrane has different mechanical properties along its length, so different regions of the membrane vibrate preferentially in response to specific frequencies of sound.

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The height of the balloon when the sandbag was released is 108m which is  moving vertically upwards with a constant speed of 3.00 m/s.

Given the constant speed of hot air balloon (v) = 3m/s

Time taken by the sandbag to fall to the ground (t) = 5s

As the balloon is moving upwards and sandbag is falling downwards they both are in motion opposite to each other.

Let the initial speed of sandbag (u) = 3m/s

Acceleration due to gravity (a) = -9.8m/s^2

From equation of motion we have: s = ut +  1/2at^2

s = 3 x 5 + 1/2(-9.8)(5)^2

s = -108m

Hence the  height of the balloon when the sandbag was released is 108m.

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Explanation:

back ground radiation is a natural radiation so basically everything emits background radiation. so if it were harmful, the world wouldn't be here,

so it is false

it knocks electrons out of atoms, this is because ionising radiation is a radiation that had enough energy to remove electrons form the atoms and molecules.

true because exposure to radon can damage biological molecules such as proteins, which leads to abnormal patterns of cell division, which leads to cancer.

hope it is helpful, if not , you can report and let someone else try it out.

do vote, thank you

The statement 'establishing a high critical value in a statistical test is associated with more confidence' is TRUE.

The statistical significance is a arbitrary value used to indicate that data collected can be used to confirm (or reject) my working hypothesis.

The most widely used value to measure the statistical significance is the p threshold.

In conclusion, the statement 'Establishing a high critical value when calculating the results of a statistical test means that a researcher will have more confidence in finding significance than when a lower critical value is established' is TRUE.

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Answer:

The answer is F or false

Explanation:

correct edge 2023

Answer:

2835

Explanation:

Simply observe, my foot.

Nah, if 3 is next to 8, and 2 is not by 3, that means it is either 382 or 283.

If 5 is not by 2, then it must be by the 3, since the 3 is on the other side and is the only location left.

You now have

5382 or 2835.

It is less than 5000, so it is the latter.

Answer: D

The substance's temperature

Explanation:

According to kinetic theory, increase in temperature causes increase in kinetic energy of particles in a system.

When the kinetic energy of particles in a substance decreases, it has nothing to do with the size of the particles and the specific heat capacity of the particles or substance. But it a clear indication that the substance temperature has also decreased.

Answer:

D

Explanation:

The density of the SF₆ gas at the given pressure and temperature is 2.96 g/l.

The given parameters:

The molecular mass of the SF₆ gas is calculated as follows;

M of SF₆ = 32 + (6 x 19) = 146 g/mol

The density of the SF₆ gas is calculated by applying ideal gas law as follows;

\(PV = nRT\\\\PV = \frac{m}{M} RT\\\\PM = \frac{m}{V} RT\\\\PM = \rho RT\\\\\rho = \frac{PM}{RT}\)

where;

\(\rho = \frac{0.5 \times 146}{0.0821 \times 300} \\\\\rho = 2.96 \ g/l\)

Thus, the density of the SF₆ gas at the given pressure and temperature is 2.96 g/l.

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The Euler-Lagrange equation with integral constraints demonstrates that a sphere maximizes the enclosed volume for minimal surface area.

The Euler-Lagrange equation with integral constraints provides a mathematical framework to prove that a sphere is the shape that maximizes the enclosed volume while minimizing the surface area.

To understand this concept, let's start by considering a simpler case: a two-dimensional scenario where we aim to maximize the area of a shape given a finite perimeter.

Taking the semicircle above the x-axis as an example, we can demonstrate that a circle is the shape that maximizes the area for a given perimeter. Extending this principle to three dimensions, we imagine an arbitrary curve above the x-axis and rotate it about the x-axis.

The resulting shape is a surface of revolution. Now, the objective is to maximize the volume of the solid generated by the rotation while keeping the surface area as a finite constraint.

By applying the Euler-Lagrange equation with integral constraints, we can analyze the infinitesimal area of the circular strip generated by the revolution. Through mathematical calculations and optimization techniques, it can be proven that a sphere is the shape that maximizes the enclosed volume for minimal surface area.

The Euler-Lagrange equation, integral constraints, and optimization principles to delve deeper into the mathematical foundations behind this intriguing relationship between volume and surface area. Understanding these concepts is essential for exploring various mathematical and physical phenomena.

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The shape of the curve that a projectile follows is a parabola.

When a projectile is launched at an angle to the horizontal with an initial velocity, its trajectory forms a parabolic shape. This is due to the combined effects of horizontal and vertical motions. The x-component of the velocity vector represents the velocity in the horizontal direction, while the y-component represents the velocity in the vertical direction.

To decompose the initial velocity vector, we use trigonometric functions. The x-component of the velocity vector is given by the magnitude of the initial velocity multiplied by the cosine of the launch angle. The cosine function relates the adjacent side of a right triangle (horizontal component) to the hypotenuse (initial velocity). Therefore, multiplying the magnitude of the initial velocity by the cosine of the angle gives us the x-component.

On the other hand, the y-component of the velocity vector is given by the magnitude of the initial velocity multiplied by the sine of the launch angle. The sine function relates the opposite side of a right triangle (vertical component) to the hypotenuse (initial velocity). Multiplying the magnitude of the initial velocity by the sine of the angle gives us the y-component.

By considering both the horizontal and vertical components of velocity, we can understand the motion of a projectile and determine its trajectory, which follows a parabolic path.

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Parallax is the apparent shift in the position of an object when viewed from different angles. In the case of the two pencils, if they are moved closer together and observed while moving the head, there will be an apparent relative motion between them due to parallax.

To eliminate this parallax and have no apparent relative motion between the two pencils, they must be at a distance where the angle between the two pencils, as seen from each eye, is so small that the difference in the positions of the pencils appears to be negligible.

This distance is called the distance of the pencils' separation. It is the distance between the two pencils that makes the angle between them too small to cause parallax. To determine the distance of the pencils' separation, we can use the formula:

Distance of separation = (distance between eyes x distance of the closest pencil) / (distance of the farthest pencil - distance of the closest pencil)

The distance between eyes is typically around 6.5cm for an average adult. Let's say the closest pencil is 10cm away from the eyes, and the farthest pencil is 11cm away. Plugging these values into the formula, we get:

Distance of separation = (6.5cm x 10cm) / (11cm - 10cm) = 65cm

Therefore, the pencils must be placed at a distance of 65cm apart from each other to eliminate parallax and have no apparent relative motion between them.

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The first law of physics, commonly referred to as the law of inertia, asserts that unless acted upon by a net external force, an object at rest will remain at rest and an object in motion will continue moving with a constant velocity.

A baseball is violently struck by a bat. According to Newton's third law, when object A pulls on item B, object B pulls in the opposite direction and with an equal amount of power.

Since there is no friction, the ball should keep rolling in accordance with Newton's first law. The solution is in a different kind of friction, rolling friction is the term. Rolling friction happens when two imperfectly stiff objects come into contact.

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So, if the Juan de Fuca plate keeps moving at its current rate and direction, it would take around 17,307,692.3 years for it to entirely bury beneath the North American plate.

The Juan de Fuca plate is subducting beneath the North American plate at the Cascadia trench at a pace of approximately 9.8 to 13.8 feet per 100 years as a result of this plate's movement northeastward in relation to North America along a convergent plate boundary.

To begin, we can apply the formula:  distance = rate x time

To begin, multiply 450 km by 1,000,000 mm/km to convert the breadth of the Juan de Fuca plate from kilometres to millimetres:

450 km x 1,000,000 mm/km = 450,000,000 mm

The Juan de Fuca plate is therefore 450,000,000 mm wide.

The values we have can then be entered into the algorithm to solve for time:  distance = rate x time

450,000,000 mm = 26 mm/year x time

time = 450,000,000 mm / 26 mm/year

time ≈ 17,307,692.3 years

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The question is incomplete but the parts of the electric circuit have been outlined below.

An electric circuit is a path through which electric current flows, and typically consists of several components, including:

Power source: A device that provides the electric energy needed for the circuit to function, such as a battery, generator, or power supply.

Conductors: Materials that allow electric current to flow through them easily, such as copper wires.

Load: The device or component in the circuit that consumes or uses the electric energy, such as a light bulb, motor, or resistor.

Switch: A device that can be used to open or close the circuit, allowing or blocking the flow of electric current.

Control elements: Devices that can regulate or control the flow of electric current, such as diodes, capacitors, and transistors.

Connectors: Materials or devices used to connect the components of the circuit together, such as wire nuts, solder, or connectors.

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To calculate the current associated with an NCV pulse, we need to know the information about an axon's potential, resistance per unit length, and length.

This is because electrical signal travel through axons, which can be modeled as electrical circuits. Ohm's Law, I = V/R, can be applied to calculate the current, where V is the potential difference and R is the resistance per unit length of the axon. The length of the axon is also needed to determine the overall resistance. Therefore, understanding the electrical properties of axons, such as their potential and resistance, is crucial in calculating the current associated with an NCV pulse.

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The final velocity of the jeep after 20 seconds is 170 m/s.

The initial velocity of the jeep is not provided. Therefore, we can only find the final velocity of the jeep and the distance it has traveled after 20 seconds using the acceleration provided.

The formula for final velocity is given as;v = u + at,where:v = final velocity,u = initial velocity,

a = acceleration

t = time taken

It is given that the jeep is moving with an acceleration of 8.5 (m)/(s²).

After 20 seconds, the final velocity of the jeep can be calculated as;v = u + atv = 0 + (8.5 m/s² × 20 s)

v = 170 m/s.

Therefore, the final velocity of the jeep is 170 m/s

.After 20 seconds, the distance covered by the jeep can be calculated using the formula;

S = ut + 1/2 at²where:

S = distance

t = time taken

a = acceleration

u = initial velocity (not given).

Since the initial velocity is not given, we cannot find the distance covered by the jeep. Therefore, the answer is;

The final velocity of the jeep after 20 seconds is 170 m/s.

The distance it has travelled after 20 seconds cannot be determined without the initial velocity of the jeep.

In conclusion, the final velocity of the jeep after 20 seconds is 170 m/s. However, the distance travelled by the jeep cannot be determined without the initial velocity of the jeep.

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Answer: 31.80m

Explanation:

Given the following :

Initial Velocity (u) = 1.7m/s

Acceleration (a) = 1.2m/s²

Time (t) = 6seconds

Distance covered during the process:

Using the motion equation; calculate the final velocity (v)

v = u + at

v = 1.7 + (1.2*6)

v = 1.7 + 7.2

v = 8.9m/s

We can then find the distance covered during the process using :

v² = u² + 2aS

Where ; v = final velocity ; u = initial velocity

S = distance and a = acceleration

Hence,

8.9² = 1.7² + (2 × 1.2 × s)

8.9² = 2.89 + (2.4 × s)

79.21 = 2.89 + 2.4s

79.21 - 2.89 = 2.4s

76.32 = 2.4s

s = 76.32 / 2.4

s = 31.8m

The correct statement of Newton's Second Law is: An object's acceleration is inversely proportional to its mass and proportional to the net force acting on it.

Newton's Second Law of Motion states that the force acting on an object is directly proportional to the mass of the object and its acceleration. In other words, the greater the force applied to an object, the greater its acceleration, and the greater the object's mass, the less it will accelerate for a given force.

This law is often expressed mathematically as F = ma, where F is the force applied to an object, m is the object's mass, and a is its acceleration.

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The linear distance traveled per unit of time, also known as speed, describes how fast an object is moving without considering its direction.

The linear distance traveled per unit of time is commonly referred to as speed. Speed is a fundamental concept in physics that describes how fast an object is moving without considering its direction. It is a scalar quantity, which means it only has magnitude and no specific direction.

Speed is calculated by dividing the total distance traveled by the time taken to travel that distance. The formula for speed is:

Speed = Distance / Time

For example, if an object travels a distance of 100 meters in 10 seconds, its speed would be:

Speed = 100 meters / 10 seconds = 10 meters per second

Speed is an important concept in various fields, including physics, sports, and everyday life. It helps us understand how quickly objects move and allows us to compare the speeds of different objects.

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The energy conversion happens in three forms.  Nuclear energy is converted into thermal energy, thermal energy is converted into mechanical energy, and mechanical energy is converted into electric energy.

Nuclear power is described as the use of nuclear reactions to produce electricity which can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions.

In the nuclear power plants, nuclear reactors and their equipment contain and control the chain reactions which most is commonly fueled by uranium-235, to produce heat through fission.

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Hey,

Following the second Newton's Law  :

✔ We apply : F = m x a ⇔ m = F/a with F in N, m in kg and a in m/s²

the object therefore has a mass of 8 kg

Answer:

a

Explanation:

The time constant (in ms) of the RC circuit is 3.75 ms. Hence, the correct option is  (d) 3.75 ms.

The rate of decay of the current in a charging capacitor is proportional to the current in the circuit at that time. Therefore, it takes longer for a larger current to decay than for a smaller current to decay in a charging capacitor.A capacitor is discharged through a 20.0 Ω resistor.

The discharge current decreases to 22.0% of its initial value in 1.50 ms. We can obtain the time constant of the RC circuit using the following formula:$$I=I_{o} e^{-t / \tau}$$Where, I = instantaneous current Io = initial current t = time constant R = resistance of the circuit C = capacitance of the circuit

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The time constant of the RC circuit is approximately 0.674 m s.

To determine the time constant (τ) of an RC circuit, we can use the formula:

τ = RC

Given that the discharge current decreases to 22.0% of its initial value in 1.50 m s, we can calculate the time constant as follows:

The percentage of the initial current remaining after time t is given by the equation:

I(t) =\(I_oe^{(-t/\tau)\)

Where:

I(t) = current at time t

I₀ = initial current

e = Euler's number (approximately 2.71828)

t = time

τ = time constant

We are given that the discharge current decreases to 22.0% of its initial value. Therefore, we can set up the following equation:

0.22 =\(e^{(-1.50/\tau)\)

To solve for τ, we can take the natural logarithm (ln) of both sides:

ln(0.22) = \(\frac{-1.50}{\tau}\)

Rearranging the equation to solve for τ:

τ = \(\frac{-1.50 }{ ln(0.22)}\)

Calculating this expression:

τ ≈ 0.674 m s

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The expected result of the experiment is that the liquid air will boil because the extreme difference in temperature will cause heat to be transferred from the ice to the liquid air ( B ).

The temperature of the liquid air = - 200 °C

The temperature of the block of ice = - 12 °C

Since they are in a thermally insulated flask, the heat will be transferred until both the objects' temperature becomes equal. So the temperature of liquid air rises and the temperature of ice decreases. The boiling point of liquid air is - 194.35 °C. So the liquid air boils.

Option A would have been correct if the final statement was decrease in temperature and not increase in temperature. Option C is incorrect because the ice becomes colder. Option D is incorrect because liquid air will boil.

Therefore, the expected result of the experiment is that the liquid air will boil because the extreme difference in temperature will cause heat to be transferred from the ice to the liquid air and the molecules of the liquid air will begin to leave the liquid ( B ).

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Answer:

The cumulative distance that the bird travel is 13.33 Km

Explanation:

Given that,

Velocity of runner = 3.4 km/hr

Distance = 8 km

Velocity of bird = 17 km/hr

Let x is the distance from the origin where the runner run into the bird

We need to calculate the value of x

Using time of runner and bird

\(t_{r}=t_{b}\)

\(\dfrac{d_{r}}{v_{r}}=\dfrac{d_{b}}{v_{b}}\)

Put the value into the formula

\(\dfrac{x}{3.4}=\dfrac{8+(8-x)}{17}\)

\(17x=3.4\times8+3.4(8-x)\)

\(17x=27.2+27.2-3.4x\)

\(17x+3.4x=54.4\)

\(x=\dfrac{54.4}{20.4}\)

\(x=2.67\)

We need to calculate the cumulative distance that the bird travel

Using distance of bird

\(d_{b}=16-x\)

Put the value into the formula

\(d_{b}=16-2.67\)

\(d_{b}=13.33\ km\)

Hence, The cumulative distance that the bird travel is 13.33 Km

Answer:

Electrostatic force

Explanation:

When we comb the hair

Answer:

T = mg / cos θ

ac = g tan θ

Explanation:

Draw a free body diagram. There are two forces acting on the pendulum bob. A tension force T acting θ from the vertical, and gravity pulling down.

Sum the forces in the y direction:

∑F = ma

T cos θ − mg = 0

T = mg / cos θ

Sum the forces in the centripetal direction (towards the center).

∑F = ma

T sin θ = m ac

ac = T sin θ / m

Substitute for tension T:

ac = (mg / cos θ) sin θ / m

ac = (mg / m) (sin θ / cos θ)

ac = g tan θ