Assuming the speed of the ball is constant (an approximation) , when would the tension in the cord connected to the ball be greatest?

Given,

The initial speed, u=20.00 m/s

The distance between the submerine and the target is d=2000.0m

The sound of impact is heard after T=101.4 s.

To find

The speed of sound in water.

Explanation

Here the total time taken to reach the submarine is the sum of thetime taken by the torpedo to reach the target and the time taken for it to come back.

Let the speed be v.

Thus,

Conclusion

Speed of the sound in water is 1428.6 m/s

Answer:

There is only a beat frequency when the frequency heard (perhaps a tuning fork) is different from the frequency from  the object in question (piano string, etc.).

The beat frequency equals the difference of the frequencies of the sources.

The piano tuner should adjust the tension in the wire to: C. decrease the amount of interference and decrease the beat frequency.

A wave can be defined as a disturbance created in a medium, which progressively transports energy from a source to another location without the transportation of matter.

Basically, some of the phenomenon and properties associated with waves include the following:

An interference refers to a phenomenon in which two (2) waves meet while traveling along the same medium and they superpose to produce a resultant wave with either a lower, greater, or the same amplitude.

In this scenario, a beat frequency is being heard by a piano tuner when using a tuning fork to tune a piano wire. Thus, the piano tuner should adjust the tension in the wire, so as to decrease the amount of interference and the beat frequency.

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The acceleration of the object will vary throughout the cycle. At the maximum displacement from the central point, the acceleration will be at its maximum, and at the central point, the acceleration will be zero. As the object moves from one extreme to the other, the acceleration will change direction, causing the object to speed up and slow down.

When an object undergoes simple harmonic motion, it oscillates back and forth around a central point. Throughout a complete cycle, the object will experience both a maximum and minimum displacement from this central point, resulting in a varying amplitude. However, the speed of the object will remain constant at the central point, and will be at its maximum when passing through the equilibrium position.

The period of the motion, which is the time it takes for one complete cycle, will also remain constant for the object, regardless of the amplitude. This means that the time it takes for the object to go from the maximum displacement on one side of the central point, through the central point, and back to the maximum displacement on the other side, will be the same every time.

Finally, the acceleration of the object will vary throughout the cycle. At the maximum displacement from the central point, the acceleration will be at its maximum, and at the central point, the acceleration will be zero. As the object moves from one extreme to the other, the acceleration will change direction, causing the object to speed up and slow down.

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An electrically charged object can be used to attract any object with an opposite charge.

This is due to the fundamental principle that opposites attract and repel in physics.

Electric charge is a fundamental property of matter that gives rise to electromagnetic interactions. An electric charge, whether positive or negative, produces an electric field that surrounds it. This field exerts a force on any other charge in its vicinity that is either attracted to or repelled from it. Electric charge is a fundamental property of matter that produces a variety of electric phenomena. When the charge is concentrated in a localized region of space, the object is electrically charged. When there is a net accumulation of charge in an object, it becomes electrically charged. An electrically charged object produces an electric field in its vicinity, which exerts a force on other charged objects. An electrically charged object can be used to attract objects with an opposite charge or repel objects with the same charge.

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Answer:

Earth

Explanation:

The net force on the rectangular loop is given by 2 A * (4 L₁ + 3 L₂) * B.

To compute the net force on the rectangular loop due to the interaction with the long, straight wire, we can use Ampere's law and the right-hand rule.

The magnetic field produced by the long, straight wire at a distance r from the wire is given by the equation:

B = (μ₀ * I) / (2 * π * r),

where B is the magnetic field, μ₀ is the permeability of free space (4π × 10^-7 T·m/A), I is the current, and r is the distance from the wire.

Considering the right-hand rule, the magnetic field lines around the long, straight wire will form concentric circles around it. These magnetic field lines intersect the rectangular loop, exerting a force on it.

The force on a current-carrying wire in a magnetic field is given by the equation:

F = I * L * B * sin(θ),

where F is the force, I is the current, L is the length of the wire, B is the magnetic field, and θ is the angle between the wire and the magnetic field.

Since the long, straight wire is parallel to one of the sides of the rectangular loop, the angle θ between the wire and the magnetic field is 90 degrees. Therefore, sin(θ) = 1.

Now, let's calculate the force exerted on each side of the rectangular loop:

Top side: F₁ = (4 A) * (L₁) * (B) * (sin 90°) = 4 A * L₁ * B

Bottom side: F₂ = (4 A) * (L₁) * (B) * (sin 90°) = 4 A * L₁ * B

Left side: F₃ = (3 A) * (L₂) * (B) * (sin 90°) = 3 A * L₂ * B

Right side: F₄ = (3 A) * (L₂) * (B) * (sin 90°) = 3 A * L₂ * B

Since the top and bottom sides have the same length, L₁, and the left and right sides have the same length, L₂, we can simplify the calculations:

F = (4 A * L₁ * B) + (4 A * L₁ * B) + (3 A * L₂ * B) + (3 A * L₂ * B)

= 8 A * L₁ * B + 6 A * L₂ * B

= 2 A * (4 L₁ + 3 L₂) * B

Therefore, the net force on the rectangular loop is given by 2 A * (4 L₁ + 3 L₂) * B.

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The rain showers have continued over a particular area for several days means that a warm front is formed over there due to which slow rainfall will occur over a large area for long period of time. Hence, option A is correct.

In meteorology, a warm front is the leading edge of a warm air mass that advances as a "front," slides over a colder air mass, and replaces the latter by expelling the latter as it passes.

The border between the two air masses is less obvious than it is at the cold front because it is farther away.

When tropical air collides with polar air that is cooler, a warm front is created. Due to the warmer air's reduced density and impending warm front, the atmospheric pressure drops as the temperature rises. As a result of the warm front's longer slope than the cold front's, different kinds of clouds and amounts of precipitation result. Usually, layer clouds like stratus or cirrus can be seen above the warm front.

When a cold front catches up to a warm front and the energy of both fronts combines, it can occasionally cause an occlusion since the warm front moves more slowly than the cold front. A strong depression (low pressure) arises shortly before the warm air is forced upward.

Hence, a warm front must occur where rain showers continued over a particular area for a long period of time.

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The magnitude of the force that the charged sphere exerts on the line of charge is zero.

Electric force is the attracting or repulsive interaction between any two charged things. Similar to any force, Newton's laws of motion describe how it affects the target body and how it does so.

The the magnitude of the force  is = kQ₁Q₂/r²

= (9×10⁹) × 2.00 × 10⁻⁶ × 5.80 × 10⁻⁹ × dl/x²

But these forces are equal and in opposite direction,  the magnitude of the force that the charged sphere exerts on the line of charge is zero.

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Answer:

Heat for -20 to zero = .48 * 1000 = 480 calories

Heat to melt ice = 1000 * 79.7 = 79700 calories

Total calories required = 80,200 calories

80,200 cal * 4.19 J/cal = 336,000 J

336000 J / 1000 J/sec = 336 sec

336 sec / 60 sec/min = 5.6 min

(c - 5.55 min)

True. Hubble's law, which states that the recessional velocity of a galaxy is proportional to its distance from Earth, can be used to determine the distance to faraway galaxies.

By measuring the redshift of light emitted by galaxies, astronomers can calculate their recession velocity, and from there, use Hubble's law to calculate their distance from Earth. This has allowed us to estimate the size and age of the observable universe, and to study the large-scale structure of the cosmos.

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Radii is a vital feature of the elements, and it can be useful in determining the characteristics of elements in various chemical and physical processes. The radii of atoms and ions of the same element differ due to their various charge and mass characteristics.

Atomic and ionic radii increase as you move down a group on the periodic table, and decrease as you move across a period from left to right due to increased nuclear charge, making the electrons closer to the nucleus. The size of an atom and ion also changes due to the number of electrons charge, and electronic configuration.In order of increasing radius, the arrangement of \(Ne, F-, O2-, Br-, Rb\) is given as follows:

\(Ne < F- < O2- < Br- < Rb+\)

Rb+ has the smallest radius due to its large nuclear charge and fewer electrons in the valence shell.

As a result, they are larger than Rb+. O2- has more electrons than Ne and is the largest among the given ions and atoms. It is important to note that in certain conditions, the trends in radii may not be valid because of hybridization and other factors. Nonetheless, this arrangement is valid for the given ions and atoms.

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Answer:

the voltage is the same in all parallel components because by definition you have connected them together with wires that are assumed to have negligible resistance. the voltage at each end of the wire is the same ( ideally ) . so all the components have to have the same voltage.

Explanation:

sduhgg DJ j st jJjph h zo jojhljfdkfdpgpzpppap

When entering traffic after being parked at a curb, you should proceed with caution, yield to oncoming traffic, and merge smoothly into the flow of vehicles.

When entering traffic from a parked position at a curb, it is important to follow certain steps to ensure a safe and smooth transition. Here is a step-by-step explanation:

1. Check for traffic: Before entering the flow of traffic, look in both directions to ensure there is a safe gap in the traffic.

2. Signal your intention: Activate your vehicle's turn signal to indicate your intention to merge into the traffic.

3. Yield to oncoming traffic: If there are vehicles approaching, yield the right of way and wait for a safe gap to merge into the traffic. It is important to give way to vehicles already on the road.

4. Accelerate smoothly: Once you have found a suitable gap, accelerate smoothly and merge into the flow of traffic. Be mindful of the speed and spacing of the vehicles around you.

5. Adjust your speed: Gradually adjust your speed to match the flow of traffic, ensuring that you are not impeding the normal movement of vehicles.

By following these steps, you can safely enter traffic after being parked at a curb, allowing for a seamless transition into the flow of vehicles.

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Answer: To determine the speed of an object, you need to know the distance traveled and the Time = 4.0 seconds The speed of the cheetah in miles per hour is 63 mph 5. How far can a person run in 15 minutes if he or she runs at an average .

Explanation: I hope that was helpful !

Radio telescopes would not represent a good choice for astronomical study of visible light.

This is because radio telescopes are designed to detect and study radio waves, which have longer wavelengths than visible light. While they can provide valuable insights into phenomena such as pulsars and quasars, they would not be able to capture the detailed images of stars and galaxies that can be obtained with optical telescopes.

Additionally, radio telescopes are typically more expensive and complex than optical telescopes, making them less accessible for amateur astronomers.

Therefore, for studying visible light and capturing high-resolution images of celestial objects, optical telescopes would be a better choice.

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Answer: c living in a camber in an under water habitat

Explanation:

Answer:

Look at the mirror from the positive axis and  suppose the incident ray is at angle at 40 from the y-axis

Incident ray at 50 deg

reflected ray at 130 deg

total angle of deflection = 130 - 50 = 80 deg

Now rotate the mirror by 20 deg

incident ray at 30 deg

reflected ray at 150 deg    (angle of incidence must equal angle of reflection)

total angle of deflection = 150 - 30 = 120 deg

the difference between 2 reflected rays = 120 - 80 = 40 deg

So if you increase (decrease) the incident angle the reflected ray will  be increased by twice the angle of rotation of the mirror - or the perpendicular to the mirror increases by X degrees the angles of incidence and reflection will each increase by X deg

When observing the applications of pistons in lifting operations, you are seeing both the increase in energy and Pascal's principle in action.

Piston systems are commonly used in lifting operations, such as hydraulic lifts and jacks. They work based on Pascal's principle, which states that when pressure is applied to a fluid in a confined space, it is transmitted equally in all directions.

In the case of a piston, a force applied to a small area on one side of the piston is transmitted through the fluid and results in a larger force on the larger area of the opposite side of the piston.

This allows for the amplification of force or energy, making it possible to lift heavy objects. Therefore, when observing pistons in lifting operations, you witness the application of Pascal's principle and the increase in energy or force.

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Answer:

\(\huge\boxed{\sf P = 2592\ Ns}\)

Explanation:

Mass = m = 162 kg

Velocity = v = 16 m/s

Momentum = P = ?

P = mv

Put the given data in the above formula.

P = (162)(16)

P = 2592 Ns

\(\rule[225]{225}{2}\)

Using the z-distribution, it is found that  maximum the error of the estimate is of 0.0475 hours.

X ± Z(S ÷ √n)

x= is the sample mean.

z =is the critical value.

n= is the sample size.

ơ  =is the standard deviation for the population.

margin of error is the given by:-

Margin of Error  given as = Z * ơ / √n

We have  90% the confidence level, hence, z is the value of Z that has a p-value of , so the critical value of  z = 1.645.

putting value in equation we get

Margin of Error= 1.645*.5/√300

so, Margin of Error is 0.0475 hours

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Answer:

16.67 s

Explanation:

Given that the

Grant sprints 50m to the right with an average velocity of 3 m/s.

According to definition of speed,

Speed = distance/time

Substitute speed and distance into the formula.

3 = 50 / t

Make time t the subject of formula

t = 50 / 3

t = 16.667 seconds

Therefore, the number of seconds the Grant sprint is 16.7 s approximately.

Answer:

32 m/s

Explanation:

It looks like the diagram is telling you that there is a net force of 8 N + 4 N = 12 N pointed to the right. By Newton's second law, the magnitude of the net force F is equal to the mass m times the acceleration a :

F = m a

12 N = (4 kg) a

a = (12 N) / (4 kg)

a = 3 m/s²

The grandfather paradox alteration is a concept in the field of time travel that explores the consequences of a person traveling back in time and altering events in such a way that it prevents their own existence.

The paradox arises when a person travels back in time and kills their own grandfather before their father or mother is conceived, thereby preventing their own birth. This creates a paradox because if the person never existed, they could not have traveled back in time to alter events in the first place.

The grandfather paradox alteration is often used to explore the potential dangers and implications of time travel, as well as the concept of causality and how it relates to time. It is also used to examine the idea of alternate timelines and how changes in the past can create a different present or future.

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After the collision, the motorcycle's velocity is around 3.42 m/s, and the bicycle's velocity is approximately -1.42 m/s in the opposite direction.

To solve this problem, we can apply the principles of conservation of momentum and the coefficient of restitution. The conservation of momentum states that the total momentum before the collision is equal to the total momentum after the collision.

Let's denote the initial velocity of the motorcycle as v1, the initial velocity of the bicycle as v2, the final velocity of the motorcycle as v1f, and the final velocity of the bicycle as v2f.

The total momentum before the collision can be calculated as:

Initial momentum = (mass of the motorcycle * initial velocity of the motorcycle) + (mass of the bicycle * initial velocity of the bicycle)

= (75 kg * 10 m/s) + (45 kg * 8 m/s)

= 750 kg·m/s + 360 kg·m/s

= 1110 kg·m/s

According to the conservation of momentum, the total momentum after the collision is equal to the initial momentum:

Total momentum after the collision = (mass of the motorcycle * final velocity of the motorcycle) + (mass of the bicycle * final velocity of the bicycle)

= (75 kg * v1f) + (45 kg * v2f)

Now, let's consider the coefficient of restitution (e = 0.5). The equation for the coefficient of restitution is:

Coefficient of restitution (e) = (relative velocity of separation) / (relative velocity of approach)

= (v2f - v1f) / (v2 - v1)

Since it's a head-on collision, the relative velocity of approach is the sum of the velocities of the two masses before the collision:

Relative velocity of approach = v2 - v1

To find the relative velocity of separation, we can use the equation:

Relative velocity of separation = e * (relative velocity of approach)

= e * (v2 - v1)

Substituting these values into the equation for conservation of momentum, we have:

1110 kg·m/s = (75 kg * v1f) + (45 kg * v2f)

Since we have two unknowns (v1f and v2f), we need another equation to solve for them. Using the equation for the relative velocity of separation, we have:

v2f - v1f = e * (v2 - v1)

45 kg * v2f - 75 kg * v1f = 0.5 * (45 kg * 8 m/s - 75 kg * 10 m/s)

Now we have a system of two equations with two unknowns. Solving these equations simultaneously will give us the final velocities of the motorcycle (v1f) and the bicycle (v2f) after the collision.

By solving these equations, we find that the final velocity of the motorcycle (v1f) is approximately 3.42 m/s, and the final velocity of the bicycle (v2f) is approximately -1.42 m/s. The negative sign indicates that the bicycle is moving in the opposite direction after the collision.

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The conversion steps listed above in order from start to finish are already in an arranged form from 1-4.

A biosphere can be defined as the part of the earth that supports life. These include :

The flow of energy through the biosphere includes

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Lightning arresters are devices that are used in electrical systems to protect them from the destructive power of lightning. The use of lightning arresters in electrical systems is necessary because lightning is one of the most significant sources of transient over voltages, which can cause serious damage to electrical systems and equipment.

Lightning arresters work by providing a low-impedance path for the high-voltage surges caused by lightning. They are designed to conduct the high currents that are generated by lightning strikes to the ground, thus protecting the electrical system from damage.

During normal operation, lightning arresters are an open circuit. However, during a lightning strike, they become a closed circuit, providing a low-impedance path for the lightning current. When the lightning strikes the lightning arrester, an arc is created between the electrodes of the arrester, which is like a short circuit.

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