a man hits the end of a uniform steel railroad rail with a sledge hammer. how long does the sound wave take to travel 439 km through the rail, where a scientist detects it?

Answer:

See below

Explanation:

An object at rest tends to stay at rest unless acted on by a force

An object at rest will stay at rest until a force touches it.

such has..

a pencil, not moving and still.

you tap the pencil, or pick it up. by using your force to pick it up.

The size of the magnetic force on the wire due to the applied magnetic field of 0.55 T pointing straight down is 0.55 N (to two significant figures).

The magnetic force on a current-carrying wire is given by the equation F = I * L * B * sinθ, where F is the magnetic force, I is current, L is the length of the wire, B is the magnetic field, and θ is the angle between the current and the magnetic field.

In this case, the wire is carrying a current of 12 A (as given in the previous question), the length of the wire is 0.5 m (also given in the previous question), and the magnetic field is 0.55 T (given in the current question). Since the wire is perpendicular to the magnetic field, sinθ is equal to 1.

Plugging in these values into the equation, we get F = 12 * 0.5 * 0.55 * 1 = 0.55 N, rounded to two significant figures. Therefore, the size of the magnetic force on the wire due to the applied magnetic field is 0.55 N.

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Answer: nuclear energy, fossil energy -- like oil, coal and natural gas -- and renewable sources like wind, solar, geothermal and hydro power

Explanation:

Energy can be in many forms like the ones I stated but the sun is probably the biggest source also and play's a big part.

Answer:

In general, once the wire is connected, the two spheres have to be held at equal electric potential (voltage). Since they are of equal size, equal voltage means equal charge. (The voltage is kQ/R on the surface of the sphere — if the two spheres are far apart.)

Explanation:

each sphere has -1c

Answer:

D) Both parts are true.

Hey there, hope my answer helps :)

Answer: D) Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.

The process that begins at B is Menstruation.

option D.

Menstruation is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina.

The menstrual cycle can be divided into three main phases:

After 28 days If the egg was not fertilized or implantation does not occur, hormonal changes signal the uterus to prepare to shed its lining, and the egg breaks down and is shed along with lining.

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The force exerted by the pedestals on the board is 2,134 N. The force exerted by the pedestals on the board can be calculated using Newton's second law of motion, which states that the force exerted by an object on another object is equal to the mass of the object multiplied by its acceleration.

In this case, the force exerted by the body on the board can be calculated using the following equation:

F = m * a

where F is the force, m is the mass of the body, and a is the acceleration due to gravity (which is 9.8 m/\(s^2\)).

The mass of the body can be calculated using its weight, which is equal to its mass multiplied by the acceleration due to gravity:

m = w

Substituting the given values, we get:

F = 300 * 9.8

F = 294 N

The force exerted by the pedestals on the board can be calculated using the same equation:

F = m1 * a

where m1 is the mass of the body, and a is the acceleration due to gravity.

The mass of the board can be calculated using its weight, which is equal to its mass multiplied by the acceleration due to gravity:

m1 = w

Substituting the given values, we get:

m1 = 200 * 9.8

m1 = 1,840 N

The force exerted by the pedestals on the board can be calculated by adding the force exerted by the body to the force exerted by the board:

F = F_body + F_board

F = 294 + 1,840

F = 2,134 N

Therefore, the force exerted by the pedestals on the board is 2,134 N.

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Here's the fact that you need to know:

"The AREA under a speed/time graph is the distance traveled during the time covered by the graph."

Now ... What's the area of that nice trapezoid on the graph ?

Hint: Area of a trapezoid is

(1/2) • (height) • (base-1 + base-2)

Answer:

false is the answer . in my point of view

The force needed to break another wire of the same length and material but twice the diameter is 200N.

Because the wires are made of the same material, their modulus of elasticity must be the same.

As a result, the ratio of longitudinal stress to longitudinal strain (Young's Modulus of Elasticity) must be the same. Now, the strains in both wires must be the same before they break.

Therefore,

stress = Young's modulus × strain,

both wires must be the same.

Because the second wire has a diameter twice that of the first, its area of cross section is four times that of the first. As a result, in order to generate the same stress, the force applied to the second wire must be four times that applied to the first wire.(since stress = force/cross section area).

Thus, the force required to break the second wire is 4200=800N.

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Answer:

Coerce, compel, constrain

Explanation:

Answer:

Solution given:

velocity=40cm/s

wave length=5cm

we have

frequency =velocity/wavelength=40/5=8hertz.

the frequency of the wave is 8 hertz.

The correct option is 2. The solid state is more dense than the liquid state.

The solid form of most substances is denser than the liquid phase so a block of most solids will sink in the liquid but a block of ice floats in liquid water because ice is less dense. Upon freezing the density of water decreases by about 9%. This is due to cooling of intermolecular vibrations allowing the molecules to form steady hydrogen bonds and locking into positions of hexagonal packing upon freezing to ice. These bonds are shorter in the crystal than in the liquid.

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The gravitational field strength is 51.6925 N/kg.

We need to know about the gravitational field to solve this problem. The gravitational field is the area where affected by gravitational force. The magnitude of the gravitational field can be calculated by this equation

g = G . m / r²

where g is the gravitational field, G is gravitational constant (6.67 x 10¯¹¹ Nm²/kg²), m is the mass of the planet and r is the radius of the planet

From the question above, we know that

m = 3.10 x 10²⁴ kg

r = 2.00 x 10⁶ m

By substituting the given parameter, we get

g = G . m / r²

g = 6.67 x 10¯¹¹ . 3.10 x 10²⁴/ (2.00 x 10⁶)²

g = 51.6925 N/kg

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The electrostatic force between a charge of 3.0 × 10⁵ coulomb and a charge of 6.0 × 10⁶ coulomb separated by 0.30 meters has a magnitude of 0.013 N (newton).

The electrostatic force is given by Coulomb’s law, which states that the magnitude of the electrostatic force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them, Coulomb’s Law states that the magnitude of the electrostatic force between two point charges is given by:

F = (kq₁q₂)/r²

where, F is the magnitude of the electrostatic force q₁ and q₂ are the two point charges separated by a distance r k is Coulomb’s constant k = 9 × 10⁹ N·m²/C², and.

The distance is measured in meters. So, putting the values into the formula:

F = (9 × 10⁹ N·m²/C²) (3.0 × 10⁵ C) (6.0 × 10⁶ C) / (0.30 m)²

F = (9 × 10⁹ × 3.0 × 10⁵ × 6.0 × 10⁶) / (0.30)²

F = (9 × 9) × (3 × 2) × 10³ × 10³ / (3 × 10)² N = (81 × 10⁶) / (9) N = 9 × 10⁶ / (1) N = 9 × 10⁶ N = 9,000,000 N or 9.0 × 10⁶ N.

Therefore, the magnitude of the electrostatic force between the two charges is 9.0 x 10⁶ N.

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Explanation:

150 km North, 50 km West,

The changes in the center of the pressure of a wing affect the aircraft's stability and control.

The center of pressure (CP) is a spot on a plane wing where the sum total of aerodynamic forces (lift, drag, and inertia) acts on the wing. The lift force of an airplane is generated by its wings, which are located at different points. The CP is the spot on the wing where the total lift force is said to be acting. This point will change as a result of changes in the airspeed, angle of attack, and lift coefficient of the wing.

When there is a change in the center of pressure of a wing, it will affect the stability and control of the aircraft. As the center of pressure shifts backward, the wing produces less lift force, and as the center of pressure shifts forward, the wing produces more lift force. If the center of pressure moves too far back, it may lead to an unstable aircraft, making it difficult to control the aircraft. If the center of pressure moves too far forward, the aircraft will become uncontrollable due to high drag and high lift. Therefore, the aircraft designers must have an in-depth understanding of the aircraft's center of pressure and the importance of the center of pressure for flight stability and control.

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To calculate the additional distance the buoy will sink when a man stands on top, we need to consider the change in buoyancy force and the additional weight added to the system.

The buoyancy force is equal to the weight of the fluid displaced by the buoy. In this case, since the buoy is floating vertically, the buoyancy force is equal to the weight of the buoy itself.

Buoyancy force = Weight of the buoy = Mass of the buoy * Gravitational acceleration

Buoyancy force = 1200 kg * 9.8 m/s^2 = 11,760 N

When the man stands on top of the buoy, his weight is added to the system. The additional weight is:

Additional weight = Mass of the man * Gravitational acceleration

Additional weight = 80 kg * 9.8 m/s^2 = 784 N

The additional weight will increase the total weight of the system, and consequently, the buoyancy force will also increase.

The additional distance the buoy will sink can be calculated using Archimedes' principle, which states that the buoyant force is equal to the weight of the fluid displaced by the object.

Additional distance = Additional weight / (Cross-sectional area * Fluid density)

The cross-sectional area of the buoy can be calculated using the diameter:

Cross-sectional area = π * (Diameter/2)^2 = π * (0.9 m / 2)^2

Assuming the fluid density of saltwater is 1025 kg/m^3, we can substitute the values into the equation:

Additional distance = 784 N / (π * (0.9 m / 2)^2 * 1025 kg/m^3)

Calculating the additional distance will provide the specific value based on the given dimensions and assumptions.

In summary, to find the additional distance the buoy will sink when a man stands on top, we consider the change in buoyancy force due to the added weight. By using Archimedes' principle, the additional distance can be calculated by dividing the additional weight by the cross-sectional area of the buoy multiplied by the fluid density.

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The oscillation of an object on a frictionless surface is characterized by a constant amplitude, regular frequency, and a lack of energy loss due to the absence of friction.

In such a scenario, the object's motion continues indefinitely, maintaining its oscillatory pattern without any decay in amplitude. Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move. Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made.

So, The oscillation of an object on a frictionless surface is characterised by a constant amplitude, regular frequency, and a lack of energy loss due to the absence of friction.

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Answer:

3.a. 6m away

b. 3m away

Explanation:

a)

Effort = 10000N

Load=5000 N

effort distance=3 m

load distance=?

We can use the following equation to calculate the distance of the load from the fulcrum:

\(\boxed{\bold{\tt{Load * Load \:Distance = Effort * Effort \:Distance}}}\)

Plugging in the known values, we get:

\(\bold{\tt{5000 N * Load Distance = 10000 N * 3 m}}\)

dividing both side by 5000 N

\(\bold{\tt{Load\: Distance =\frac{ 10000 N * 3 m }{5000 N}}}\)

Load Distance = 6 m

Therefore, the load must be 6 meters away from the fulcrum in order for the crane to be balanced.

b)

If the load is increased to 10,000N, the effort and effort distance do not change.

Effort = 10000N

Load=10,000 N

effort distance=3 m

load distance=?

This is because the moment of the load will increase, and the moment of the effort will remain the same.

The moment of the load is calculated as follows:

\(\boxed{\bold{\tt{Load * Load \:Distance = Effort * Effort \:Distance}}}\)

Plugging value

\(\bold{\tt{10,000 N * Load Distance = 10,000 N * 3 m}}\)

dividing both side by 10,000 N

\(\bold{\tt{Load\: Distance =\frac{ 10,000 N * 3 m }{10,000 N}}}\)

New Load Distance = 3 m

Therefore, if the load is increased to 10,000N, it should be placed 3 meters away from the pivot point to balance the crane.

Answer:

it would be c

Explanation:

its the only one that makes sence

On a windy day in Chicago, it is rumored that one may even see the Sears Tower vibrating. The Sears Tower makes 8.6 vibrations in a minute as it vibrates back.

Particles in the medium fluctuate about their mean location as a wave passes across it. The frequency of the wave is defined as the quantity of oscillations per second.

A wavelength is a unit used to describe the length of a wave's complete cycle. They are used to measure a wide variety of waves, including electromagnetic, sound, and light waves. The separation between two waves' subsequent points, or wavelength,

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As an AI language model, I do not condone or promote drug use or abuse. However, I can provide an objective answer to your question based on scientific and medical information. Narcotics are a class of drugs that are derived from opium or synthetic opioids.

They are powerful painkillers and are used for medical purposes to alleviate severe pain. The most important characteristic of narcotics is their ability to affect the central nervous system and produce feelings of euphoria, relaxation, and sedation. This is why they are often abused and can lead to addiction. Narcotics are also highly addictive and can cause physical and psychological dependence.

Long-term use can lead to tolerance, which means that higher doses are needed to achieve the same effects. Overdose of narcotics can lead to respiratory depression, coma, and death. Therefore, it is important to use narcotics only under the supervision of a licensed healthcare provider and to follow the prescribed dosage. Misuse of narcotics can have serious consequences, both for the individual and society.

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Narcotics are a class of drugs that are derived from opium or synthetic opioids.

They are powerful painkillers and are used for medical purposes to alleviate severe pain. The most important characteristic of narcotics is their ability to affect the central nervous system and produce feelings of euphoria, relaxation, and sedation. This is why they are often abused and can lead to addiction. Narcotics are also highly addictive and can cause physical and psychological dependence.

Long-term use can lead to tolerance, which means that higher doses are needed to achieve the same effects. Overdose of narcotics can lead to respiratory depression, coma, and death. Therefore, it is important to use narcotics only under the supervision of a licensed healthcare provider and to follow the prescribed dosage. Misuse of narcotics can have serious consequences, both for the individual and society.

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The Earth has a gravitational force that attracts objects with mass towards it. This force acts on the mtc student and pulls his body down. It is true.

Force is an invisible push or pull that acts upon an object. It is a vector quantity, meaning it has both magnitude and direction. Force can be generated by the interaction of two objects, or by the action of a single object on itself. Common examples of force include gravity, friction, and magnetism. Force is an essential part of the scientific study of motion, and is used to describe the relationship between an object’s motion and the amount of energy it possesses. Force can be measured using a variety of instruments, such as a spring scale or a force sensor.

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So, the impulse of the ball to the wall is -12 N. It have same meaning to 12 N in opposite direction with its initial movement.

Hi ! In this ocassion, I will help you to solve the question about impulses. Impulse also relate to momentum, where the amount of impulse will cause the difference (indicated in units of direction) velocity when an object move. Impulses that have opposite direction to the original direction will have a negative value.

Impulse is the result of a change in momentum, so it can be expressed in this formula :

\(\sf{I = \Delta p}\)

\(\boxed{\sf{\bold{I = m (v' - v_0)}}}\)

With the following condition:

\(\sf{I = m (v' - v_0)}\)

\(\sf{I = 0.15 (-30 - 50)}\)

\(\sf{I = 0.15 (-80)}\)

\(\boxed{\sf{I = -12 \: N.s}}\)

So, the impulse of the ball to the wall is -12 N. It have same meaning to 12 N in opposite direction with its initial movement.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\\)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 1000 \times {26}^{2} \\ = 500 \times 676 \\ = 338000\)

We have the final answer as

Hope this helps you

In the case of a two-way radio communications failure while flying in Instrument Meteorological Conditions (IMC), there are specific procedures to follow to ensure safety and effective communication with air traffic control (ATC). These procedures are outlined in aviation regulations and guidelines.

If you experience a two-way radio communications failure in IMC, the altitude and route to be followed depend on your current location and the specific airspace you are operating in. Generally, there are two main guidelines to follow:

Altitude: Continue to fly at the altitude specified in your last assigned clearance until reaching the next applicable altitude specified in the regulations for your route segment.

Route: Continue to fly the route specified in your last assigned clearance, or if not assigned a specific route, fly the route that is appropriate for your filed flight plan.

It is important to note that pilots should also be familiar with specific local regulations and procedures, such as those outlined in the country's Aeronautical Information Publication (AIP) or other relevant sources. These guidelines provide detailed instructions on the actions to be taken in the event of a radio communications failure, including any specific altitudes or routes to follow.

In any case, when experiencing a radio communications failure in IMC, it is crucial to prioritize maintaining situational awareness, following published procedures, and taking appropriate actions to ensure safety while seeking communication with ATC through alternative means if possible.

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In ten seconds,a total of 5 waves crash onto the shore of the beach .

The distance between each wave crest on the water is 8 meters.

Wave length is the length between two wave crests that is the distance between two wave crests.

We know distance between each wave crest is 8 meters

Total of 5 wave crests, the distance between first and second wave crest is 8 meters

the distance between second and third wave crest is 8 meters

So wave length = 8+8 = 16 meters

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Answer:

Variation of serving sizes

Explanation:

Explanation:

The two most commonly advanced reasons for the increase in the prevalence of obesity are certain food marketing practices and institutionally-driven reductions in physical activity, which we have taken to calling “the big two.” Elements of the big two include, but are not limited to, the “built environment”, increased ...