A water-balloon launcher with a mass of 2.0 kg is suspended on a wire. It
fires a 0.75 kg balloon to the west at a velocity of 14.0 m/s. What is the
resulting velocity of the launcher if the net force on the launcher is equal to
the reaction force?
A. 5.3 m/s east
B. 7.4 m/s east
C. 37.3 m/s east
D. 6.6 m/s west

Answer:

A

Explanation:

Answer:

Distance divided by time

Explanation:

Answer:

acceleration is the rate of change of velocity

therefore in the above statement, the velocity increases twice per second.

when acceleration is negative, then it is accelerated motion.

ie. the car accelerates twice per second

Answer:

Explanation:

b )

Normal force R = mgcosθ

= 76.6 x 9.8 x cos 38

R = 591.5 N

c )

Force of friction

= μ R

μ is coefficient of friction .

= .15 x 591.5

= 88.73 N

d )

Net force

= mg sinθ - friction

= 76.6 x 9.8 x sin 38 - 88.73

= 462.16 - 88.73

= 373.43 N

Acceleration = 373.43 / 76.6

a = 4.87 m / s²

e )

v² = u² + 2 a s

s = 40.5 m

a = 4.87

u = 0

v² = 0 +2 x 4.87 x 40.5

= 394.5

v = 19.86 m /s

f )

v = u + a t

19.86 = 0 + 4.87 t

t = 4 .07 s

Answer:

Use the AU formula

Explanation:

1 astronomical unit = 149597871 kilometer

The true frequency of the siren when the emergency worker perceives it to be 1360 Hz is 1362.86 Hz. Here, we are given the speed of sound in the air and we can use it to find the actual frequency of the siren. The formula we can use is:v = fλwherev is the speed of soundf is the frequencyλ is the wavelength

First we will find the speed of sound. We can use the formula:v = 331 m/s + 0.6 Twherev is the speed of soundT is the temperature in °CWe are given the temperature as 26°C. Therefore, we can substitute these values to get:v = 331 + 0.6(26)= 347.6 m/sNow we can find the wavelength using the formula:λ = v / fwhereλ is the wavelengthv is the speed of soundf is the frequencySubstituting the values, we get:λ = 347.6 / 1360= 0.255 mNow we can use this value to find the actual frequency of the siren using the formula:v = fλRearranging the formula, we get:f = v / λSubstituting the values, we get:f = 347.6 / 0.255= 1362.86 HzTherefore, the true frequency of the siren when the emergency worker perceives it to be 1360 Hz is 1362.86 Hz.

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Answer:

Ns/Np=1/4

Vs=?

Vp=220V

Ns/Np=Vs/Vp

Vs=Ns/NpxVp=1/4x220=55V

Explanation:

Answer:

winter solstice i think

Explanation:

Answer:

a/ solar eclipse

Explanation:

because the moon is on the left side of earth

Answer:

it is C,D

Explanation:

test proved

The average amount of precipitation in Seattle during, March. So, option D.

The average and extreme temperatures and precipitation patterns over an extended period of time at a location define the climate there.

Here,

A local, regional, or global area may be mentioned in a climate description.

Changes in the earth's climate are referred to as climate change. A variety of internal and external variables contribute to this.

Over the past few decades, the climatic shift has gained global attention. The earth's life is also impacted by these climatic shifts in a number of ways.

The city of Seattle has a moderate climate, which the most widely used categorization system places in the Mediterranean zone, however some sources place it in the oceanic zone.

It has moderate, comparatively dry summers and cool, wet winters, encompassing features of both. Because it is milder and wetter than a true Mediterranean climate but still has a dry summer, the climate is frequently referred to as a modified Mediterranean climate.

Hence,

The average amount of precipitation in Seattle during, March. So, option D.

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Answer:

KE = KE (incidental) - KE of emitted photons

or KE = h * f - Wf

So   h * f = KE + Wf = 1.2 + 1.88 = 3.08    incident energy

If you double the frequency then h * f = 6.16

KE = 6.16 - 1.2 = 4.96 eV

Answer: 1.Hotel/Motel Clerk 2.Hotel/Motel Supervisor or Manager  3.Housekeeper/Cleaning Worker 4.Concierge  5.Porter/Bellhop

A successfully professionalized field of employment is referred to as a profession.

It can be characterized as a disciplined team of people, professionals, who uphold ethical standards, present themselves as, and are recognized by the public as possessing, special knowledge and skills in a widely acknowledged body of learning derived from research, education, and training at a high level, and who are prepared to apply this knowledge and exercise these skills in the interest of others.

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Magnetic Flux is the magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity

The magnetic flux or field lines linking a coil depends on;

According to the question, the Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called magnetic flux

To obtain a large induced electromotive force, we cause a coil of many turns to move at a high speed across a strong magnetic field.

According to Faraday's law, which state that whenever there is a change in the magnetic lines of force, an electromotive force is induced, the strength of which is proportional to the rate of change of the flux linked with the circuit.

Therefore, Magnetic Flux is the magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity

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Answer:

=720000kgm/s

Explanation:

The impuse is equivalent to the rate of change of momentum which is expressed below as

Impulse= mv2 - mv1

=m(V2 - V1)

V1= initial velocity= 242 m/s

V2=final velocity= 258 m/s?

m= mass of the plane =45,000 kg

Then if we input the values, we have,

= 45000(258-242)

=720000kgm/s

Hence,the impulse on a 45,000 kg airplane is 720000kgm/s

Answer:

59.18 kg

Explanation:

use f=ma

f= 580 N

a = 9.8 m/s 2

weigh(m) doesn't change only force(F) changes

Answer: 219.6N

Explanation:

Find the mass of this person by dividing his weight by the accelleration. Remember, F=ma

580 = m*9.8

m = 59.18kg

Then multiply the mass by the new gravitational acceleration on Mars.

59.18*3.711 = 219.6N

Magnetic field strength refers to the intensity or magnitude of the magnetic field at a particular point in space. The strength of a magnetic field is not constant everywhere around a magnet but varies with distance from the magnet.

When you are close to a magnet, the magnetic field lines are more concentrated and closely packed together, resulting in higher magnetic field strength. As you move farther away from the magnet, the magnetic field lines become more spread out and less concentrated, leading to a decrease in magnetic field strength. The strength of a magnetic field decreases as the distance from the magnet increases. Therefore, the magnetic field strength is strongest close to a magnet and weakest far from the magnet. The correct answer is a.

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Answer:

cool‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ 

uhhhhhh ummm uhhh umm uhhh umm 51

If the coil is rotated about its axis which is perpendicular to its plane in counterclockwise direction by a 90° angle, the flux that penetrates the coil (a) increases.

When a circular coil is rotated about its axis which is perpendicular to its plane in counterclockwise direction by a 90° angle, the flux that penetrates the coil changes.

This is because the area of the coil that is perpendicular to the magnetic field increases while the area that is parallel to the magnetic field decreases. Therefore, the flux that penetrates the coil increases.

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The cord does approximately 3.454 J of work on the mass as it swings a distance of 8.0 cm.

To calculate the work done by the cord on the mass as it swings, we can use the formula:

Work (W) = Force (F) * Distance (d) * cos(θ)

Given:

Mass of the pendulum (m) = 4.4 kg

Length of the cord (L) = 0.7 m

Initial displacement of the mass (x) = 7.7 cm = 0.077 m

Distance swung by the mass (d) = 8.0 cm = 0.08 m

First, let's calculate the gravitational force acting on the mass:

Force due to gravity (Fg) = mass * acceleration due to gravity

= 4.4 kg * 9.8 \(\frac{m}{s^{2} }\)

= 43.12 N

Next, we can calculate the angle θ between the force exerted by the cord and the direction of motion. In this case, when the mass swings, the angle remains constant and is equal to the angle made by the cord with the vertical position. This angle can be found using trigonometry:

θ = \(sin^{-1}\)(x / L)

= \(sin^{-1}\)(0.077 m / 0.7 m)

Using a scientific calculator, we can find the value of θ to be approximately 6.32 degrees.

Now, we can calculate the work done by the cord:

W = F * d * cos(θ)

= 43.12 N * 0.08 m * cos(6.32 degrees)

Using a scientific calculator, we can find the value of cos(6.32 degrees) to be approximately 0.995.

Substituting the values into the formula:

W ≈ 43.12 N * 0.08 m * 0.995

Calculating the product:

W ≈ 3.454 J

Therefore, the cord does approximately 3.454 Joules of work on the mass as it swings a distance of 8.0 cm.

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The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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If a sheet of aluminum foil is held in front of a radioactive source. Two types of radiation are detected on the other side. The alpha particle radiation will not be detected.

The ability of some unstable atoms to emit nuclear radiation spontaneously, typically in the form of alpha or beta particles frequently accompanied by gamma rays, is known as radioactivity.

As given in the problem statement, if a sheet of aluminum foil is held in front of a radioactive source. Two types of radiation are detected on the other side, then we have to find which type of radiation will not be detected on the other side.

When a radioactive source is in front of a sheet of aluminum foil. On the opposite side, radiation of two different sorts is seen. There won't be any indication of alpha particle radiation.

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A Frost circle is a diagram used to determine the π electron structure of a cyclic molecule.

(a) The cyclopentadienyl anion has six π electrons and a planar structure. To draw its Frost circle, we start with a circle representing the ring and divide it into six segments.

B) The cyclopropenyl cation has two π electrons and a non-planar structure. To draw its Frost circle, we start with a triangle representing the ring and label the atomic orbitals as p orbitals.

The electron structure in physics refers to the arrangement of electrons around the nucleus of an atom. According to the laws of quantum mechanics, electrons occupy specific energy levels or orbitals, and their behavior is described by wave functions.

The first energy level can hold up to two electrons, the second level can hold up to eight electrons, and so on. Electrons in the outermost energy level, also known as the valence electrons, are responsible for the chemical properties of the element.

The electron structure of an atom can be determined using the periodic table, which organizes the elements based on their electron configurations. Understanding the electron structure is crucial in predicting the chemical properties and behavior of elements and their interactions with other elements in chemical reactions.

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Answer:

If its twice as far the light will be twice as bright.

Explanation:

Jupiter radiates more heat than it receives from the Sun.

Jupiter is a gas giant planet and does not have a solid surface to absorb and retain heat like the Earth. Instead, Jupiter's atmosphere absorbs and then re-radiates the energy it receives from the Sun. However, due to its large size and distance from the Sun, Jupiter receives much less solar radiation per unit area than the Earth does.

Despite this, observations show that Jupiter radiates about 1.6 times more heat than it receives from the Sun. This excess heat is generated by gravitational contraction, as the planet slowly shrinks due to its own gravity. As Jupiter contracts, gravitational potential energy is converted into heat, which is then radiated away into space.

This excess heat is also responsible for Jupiter's intense atmospheric dynamics, including its distinctive belts and zones, powerful storms, and the Great Red Spot.

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A message to travel from earth to a spacecraft at mars as its closest to earth is about 3.11 minutes.

To find the time, the given values are,

Distance = 56 million kilometers.

Here,

A message needs to be traveled to mars from earth and the distance between Earth and Mars (given) s = 56 million km

Speed of light = 3.00—10^5 km/ sec

As We know Velocity,

Velocity = distance / time

=> time = distance / velocity

Time taken t = 56 million km / 3.00—10^5

= 56 x 10^6 / 3 x 10^5

= 186.666 sec

Time taken t = 3.11 min.

So, the message to travel from earth to a spacecraft at mars as its closest to earth is about 3.11 minutes.

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The distributed loading can be replaced by an equivalent resultant force, and its line of action intersects a horizontal line along member AB at a specific distance from point A.

To simplify the analysis of a distributed loading on a member, it is often useful to replace it with an equivalent resultant force. This resultant force represents the combined effect of the distributed loading and acts at a specific location along the member.

In this case, the task is to determine the line of action of the resultant force and where it intersects a horizontal line along member AB, measured from point A. To find this, we need to calculate the magnitude and position of the resultant force.

By integrating the distributed loading along the length of the member, we can determine the total force exerted by the loading. This total force is then represented by the resultant force, which has the same magnitude but acts at a specific location.

The line of action of the resultant force intersects a horizontal line along member AB at a certain distance from point A. This distance can be determined by considering the moment equilibrium around point A and solving for the position of the resultant force.

To accurately determine the exact position of the resultant force along member AB, the specific details of the distributed loading and member geometry are needed. With this information, calculations can be performed to determine the magnitude and position of the resultant force.

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Answer:

electrons have a negative charge, while protons have a positive charge

Explanation:

In science "opposites attract"

Answer:

C. Divide the total distance by the total driving time.

Explanation:

As we are finding average speed across the entire trip, we divide the total distance by the total time taken. This is because speed = distance/time and will give us the average over the whole time.

Hope this helped!

Each of the three choices is tasteless, exhibitionist, juvenile, and dangerous.  John should do none of them.

Encountering a news crew, there's no reason for John to call attention to himself in a childish way, or interfere with their work in any way.

What he should do is:

==> Slow down

==> Pass the scene cautiously

==> Resume his normal, legal speed quietly, in case the crew happens to be recording audio at the moment.

Mysteriously, this course of action is nowhere to be found among the choices listed.

Answer:

all three options :)

Explanation:

cuz merica

Sir Isaac Newton first disproved the notion that forces are required to maintain motion by introducing the concept of inertia in his first law of motion.

The scientist who first disproved the notion that forces are required to maintain motion is Sir Isaac Newton. Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In simpler terms, Newton concluded that forces are not required to keep an object in motion or at rest. Instead, objects will naturally maintain their state of motion or rest unless acted upon by an external force. This means that if there are no forces acting on an object, it will continue to move in a straight line at a constant speed or remain at rest.

This conclusion in one line: Sir Isaac Newton first disproved the notion that forces are required to maintain motion by introducing the concept of inertia in his first law of motion.

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