a pendulum is made by tying a 75 g ball to a 130-cm long string. the ball is pulled 5.0 degrees to the side and released. how many times does the ball pass through the lowest point of its arc

The magnitude of the net electric field at the origin is kq/a².

What is magnitude?
The magnitude as well as size of a statistical model determines whether it is bigger or smaller than some other objects of the same type in mathematics. Formally speaking, the magnitude of an object is the result of the group of objects it belongs to being ordered (or ranked) and displayed. Magnitude in physics can be interpreted as either a quantity or a distance.

The magnitude of the net electric field at the origin produced by this distribution of charge is given by the equation E = kq/a², where k is a constant, q is the charge, and a is the distance between the origin and the charge. Thus, the magnitude of the net electric field at the origin is kq/a².

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The average power which is dissipated by a 100 ohm resistor when connected to an AC source with a peak value of 141 g is 19.86 W.

What do you mean by resistor?

A resistor is an electrical component that is used to control the flow of electric current in a circuit. It is used to limit the amount of current that can pass through a circuit, to reduce the voltage in a circuit, and to create a desired amount of resistance to the flow of electric current. Resistors are typically made of metal, carbon, or other materials that allow electrons to flow through them at a certain resistance. They can be used in a variety of applications such as amplifiers, oscillators, and power supplies.

This can be calculated using the following formula:

P = V²/R

Where P is the power, V is the voltage, and R is the resistance.

V = 141 g

R = 100 ohms

P = (141 g)²/100 = 19.86 W

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Explanation:

light waves because the categorised under mechanical waves

Depending on initial body weight, the reasonable weight loss rate for adults over one year is between 50-100 pounds.

In order to lose weight at a reasonable rate, make a diet plan. It should be based on one's needs and body requirements.

However, by sticking to appropriate weekly, monthly and yearly diet and exercise plans one can achieve the desired results.

For an adult, a reasonable diet and exercise plan can help him lose 1-2 pounds over a week.

Following this schedule on annual basis, there are maximum chances of losing weight around 50-100 pounds.

Moreover, burning more calories than taking inside can also help lose weight.

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The sun only appear to pass through the constellations of the zodiac because Over the course of a year, the sun appears to be in front of, or “in”, different constellations due to its orbit .

A group of stars that can be identified with the shape of an identifiable object like an animal or a known object is called a constellation. Major constellations are the Ursa Major, Ursa Minor and Cassiopeia.

Its motion is entirely an illusion, caused by Earth's own motion around our star. Over the course of a year, the sun appears to be in front of, or “in”, different constellations. One month, the sun appears in Gemini; the next month, in Cancer.

If we wanted to (and were endowed with supernatural powers), we could alter Earth's orbit so that the Sun appears to move through other constellations. Neither Lupus nor Lyra can be zodiac constellations, however, because the Sun doesn't "move through them."

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To calculate the three-sigma control limits, we first need to find the mean and standard deviation of the sample.

The mean is:

μ = (4 + 12 + 16 + 8 + 9 + 6 + 5 + 12 + 15 + 7 + 6 + 4 + 2 + 11) / 14 = 8.071

The standard deviation is calculated using the standard deviation formula and is arrived at:

σ = 4.319

The three-sigma control limits are:

Upper control limit = μ + 3σ = 8.071 + (3 × 4.319) = 20.027

Lower control limit = μ - 3σ = 8.071 - (3 × 4.319) = -3.886

b. We can check if the process is in control by looking at whether any of the data points fall outside of the control limits.

From the given data, we can see that the maximum number of complaints is 16, which is well within the upper control limit of 20.027. The minimum number of complaints is 2, which is also well within the lower control limit of -3.886.

Therefore, based on the given data, we can conclude that the process is in control.

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To move the cargo a distance δ along the microtubule, the kinesin needs to expend some amount of energy, which is measured in terms of work. According to the problem, the kinesin molecule has a force constant of k, and it moves the cargo by a distance δ against a resistive force of F. Therefore, the work done by the kinesin can be expressed as W = Fδ + ½ kδ^2. Here, Fδ represents the work done against the resistive force, while ½ kδ^2 represents the work done by the kinesin in stretching the microtubule. Therefore, the total amount of work done by the kinesin to move the cargo a distance δ along the tubule can be expressed as W = Fδ + ½ kδ^2, where F, k, and δ are the symbols used in the problem.
To calculate how much work the kinesin has to do to move the cargo a distance δ along the tubule, you'll need to use the work formula: W = F × d × cos(θ), where W is work, F is force, d is distance, and θ is the angle between the force and the direction of movement.

In this case, the force exerted by the kinesin is F, and the distance it moves the cargo is δ. The angle θ will be 0 degrees since the force and the direction of movement are in the same direction, so cos(0) = 1.

Using these variables, the formula becomes:

W = F × δ × cos(0)

As cos(0) = 1, the equation simplifies to:

W = F × δ

So, the work done by the kinesin to move the cargo a distance δ along the tubule is expressed in terms of δ and the force exerted by the kinesin (F) as:

W = F × δ

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Answer:

The Bowling Ball is Denser.

Explanation:

If we consider both balls in terms of mass they are very different.  Size and volume can be the same though.

What makes the mass?  Think of what fills each of the balls.

A Basketball is filled with air, which weighs very little.

Meanwhile, a bowling ball is filled with coverstock, made up of plastic, urethane and resin.  These materials weigh considerably more than air!

The given question is incomplete as the essential graphical result is missing, however the correct graph is attached with the answer :

Answer:

The correct answer is - According to the graph,  the current in the LDR is directly proportional to the potential difference across the LDR.

Explanation:

Two variables that are in directly proportion will consistently deliver a straight-line graph that goes through the beginning. On the off chance that the steady of proportionality is sure, the chart will have a positive slope. On the off chance that the steady is negative, the graph will have a negative angle.

In the given data and graph of the result collected by the student shows a straight line in between the current in the LDR and the potential difference across the LDR. It means they are in relation of directly proportional.

Thus, the correct answer is - According to the graph,  the current in the LDR is directly proportional to the potential difference across the LDR.

Answer:

40 to 80

Explanation:

A car's kinetic energy changes with the speed.  Cars going slower have less potential energy than cars going faster.

Large hydroelectric dams have significant environmental consequences for areas nearby.

Therefore, Making decisions about the development of hydroelectric dams requires balancing the environmental costs against the advantages of clean, renewable electricity.

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False

The Pressure Gradient Force (PGF) is the force that drives air from areas of high pressure to areas of low pressure. In both a trough and a ridge, the PGF is the same.

However, the winds will not be the same in both features.  

In a trough, the winds tend to move towards the center of the trough, where the air is rising, and this causes convergence and lifting. This upward motion causes a decrease in pressure, leading to a steeper pressure gradient, which means stronger winds. On the other hand, in a ridge, the winds move away from the center of the ridge, where the air is sinking, and this causes divergence and sinking. This sinking motion causes an increase in pressure, leading to a weaker pressure gradient and lighter winds.  

Therefore, assuming the same PGF, the trough will have the faster winds compared to the ridge.

Answer:

gamma rays

Explanation:

hope it helps

The action phase is where the actual complex movement is really carried out. The movement or action that was planned is carried out during this stage. Option B is the answer.

The stage or time frame in which a planned movement or action is actually carried out or done is referred to as the action phase. It is the time when people or other entities carry out their objectives or plans. Individuals perform the mental or physical tasks necessary to complete a certain task or objective during the action phase.

During this stage, the actions necessary to produce the intended results are actively carried out. Making ideas, plans, or intentions into observable behaviors or real results is accomplished through the action phase.

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Answer:

Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it.

Answer:

Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it. ... When in free fall, the only force acting upon your body is the force of gravity - a non-contact force.

Answer:

Rainfall

Explanation:

Streams receive their water from the rain that falls and runs directly off of the land surface into the streams, wetlands or lakes. Stream water also comes from seeps and springs where groundwater discharges from aquifers to the land surface.

Hope this helps :)

Pls brainliest...

A, water enters a watershed through rainfall. Hope this helps! :)

Boyle's Law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure, while keeping the amount of gas constant.

This means that if the pressure of a gas is doubled, the volume of the gas will be reduced to half, and if the pressure is reduced to one-third of its original value, the volume of the gas will be increased by a factor of three.

Mathematically, Boyle's Law can be expressed as:

P1V1 = P2V2

where P1 and V1 represent the initial pressure and volume, respectively, and P2 and V2 represent the final pressure and volume, respectively. As long as the temperature and the amount of gas are kept constant, the product of pressure and volume remains constant.

Boyle's Law is often observed in everyday life, such as when inflating a balloon. When the balloon is inflated, the pressure inside the balloon increases, causing the volume to expand. Conversely, when the balloon is deflated, the pressure decreases, causing the volume to decrease as well.

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Now we need to solve these equations simultaneously to find the values of M2, P2, and T2. This can be done using numerical methods or software.

Given A1 = 50 cm², A2 = 40 cm², T1 = 300 K, P1 = 100 kPa, and V1 = 100 m/s, find M2, P2, and T2 for an isentropic flow in a converging duct.

Given:

A1 = 50 cm²

A2 = 40 cm²

T1 = 300 K

P1 = 100 kPa

V1 = 100 m/s

A1 = 50 cm² = 50 × 10^(-4) m² = 0.005 m²

A2 = 40 cm² = 40 × 10^(-4) m² = 0.004 m²

M2 = sqrt((A1 / A2) ˣ ((P2 / P1) ˣ (T2 / T1)))

P2 = P1 ˣ ((A1 / A2) ˣ ((T2 / T1)) ˣ (1 / M2^2))^(gamma / (gamma - 1))

T2 = T1 ˣ ((A1 / A2) ˣ (1 / M2^2))

Where:

gamma is the specific heat ratio of the gas. For air, it is approximately 1.4.

Let's calculate M2, P2, and T2 using the given values:

A2 = 0.004 m²

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Answer:

1.) 440 Hz

2.) 659.3 Hz

Explanation:

1.) Given parameters are:

wavelength = 0.77955 m.

speed of sound = 343.00 m/s

Frequency = speed/ wavelength

Substitute speed and wavelength into the formula

Frequency = 343/ 0.77955

Frequency = 439.99

Frequency = 440 Hz approximately

2.) The parameters given are:

wavelength = 0.52028 m.

speed of sound = 343.00 m/s

Using the same formula

Frequency = speed/wavelength

Substitute all the parameters into the formula

Frequency = 343 / 0.52028

Frequency = 659.3 Hz approximately

The pitch of a note depends on the frequency of the sound waves.

The pitch of a sound increases as the frequency of the sound waves increases.

Answer:

1.) 440 Hz

2.) 659.3 Hz

Explanation:

1.) Given parameters are:

wavelength = 0.77955 m.

speed of sound = 343.00 m/s

Frequency = speed/ wavelength

Substitute speed and wavelength into the formula

Frequency = 343/ 0.77955

Frequency = 439.99

Frequency = 440 Hz approximately

2.) The parameters given are:

wavelength = 0.52028 m.

speed of sound = 343.00 m/s

Using the same formula

Frequency = speed/wavelength

Substitute all the parameters into the formula

Frequency = 343 / 0.52028

Frequency = 659.3 Hz approximately

The pitch of a note depends on the frequency of the sound waves.

The pitch of a sound increases as the frequency of the sound waves increases.

The initial height of a pendulum bob can be determined based on the speed of the bob at the bottom of the swing.

At the bottom of the swing, the pendulum bob possesses only kinetic energy. The relationship between kinetic energy (KE) and potential energy (PE) can be used to find the initial height. Since the bob is released from rest, it has no initial kinetic energy, so all its initial energy is potential energy. At the bottom of the swing, all the potential energy is converted to kinetic energy.

Equating the initial potential energy to the final kinetic energy, we can solve for the initial height. Using the equation PE = mgh, where m is the mass of the bob, g is the acceleration due to gravity, and h is the initial height, we can rearrange the equation to find h = KE/(mg). Substituting the given values, the initial height of the bob is approximately 1.99 meters.

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There are several objects that move in space.

There are many scenarios that demonstrate the motion of objects in space. Here are some examples:

Planetary motion: The motion of planets in the solar system is a classic example of objects in space in motion. The planets orbit around the sun in elliptical paths, with their motion governed by the gravitational pull of the sun.

Satellites: Satellites are artificial objects that are launched into space to perform various tasks, such as communication, navigation, and weather monitoring. The motion of satellites is determined by the gravitational forces of the Earth and other celestial bodies.

Asteroids and comets: Asteroids and comets are small, rocky or icy objects that orbit the sun. Their motion is also governed by the gravitational forces of the sun and other celestial bodies, and their orbits can be highly elliptical.

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To calculate the heat (Q) for process D to B, we need to use the first law of thermodynamics, which states that the change in thermal energy of a system is equal to the heat added to the system minus the work done by the system.

In this case, we are going from state D to state B, which means the gas is expanding and doing work on its surroundings. The work done by the gas is given by the formula W = PΔV, where P is the pressure and ΔV is the change in volume. Since the gas is expanding, ΔV will be positive.

To calculate ΔV, we can use the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin. We know the temperature at state A is 293 K, and we are told that state D has a volume twice that of state A, so we can calculate the volume at state D as:

V_D = 2V_A = 2(nRT/P)

Now, at state B, we are told that the pressure is 2 atm, so we can calculate the volume at state B as:

V_B = nRT/P = (nRT/2)

The change in volume is then:

ΔV = V_B - V_D = (nRT/2) - 2(nRT/P) = (nRT/2) - (4nRT/2) = - (3nRT/2P)

Since we are given the pressure at state A as 1 atm, we can calculate the number of moles of gas using the ideal gas law:

n = PV/RT = (1 atm x V_A)/(0.08206 L atm/mol K x 293 K) = 0.0405 mol

Now we can calculate the work done by the gas:

W = PΔV = 1 atm x (-3/2) x 0.0405 mol x 8.3145 J/mol K x 293 K = -932 J

Note that we have included the negative sign in our calculation because the gas is doing work on its surroundings.

Finally, we can calculate the heat (Q) using the first law of thermodynamics:

ΔU = Q - W

ΔU is the change in thermal energy of the system, which we can calculate using the formula ΔU = (3/2)nRΔT, where ΔT is the change in temperature. We know the temperature at state B is 120ºC, which is 393 K, so ΔT = 393 K - 293 K = 100 K. Substituting in the values for n and R, we get:

ΔU = (3/2) x 0.0405 mol x 8.3145 J/mol K x 100 K = 151 J

Now we can solve for Q:

Q = ΔU + W = 151 J - (-932 J) = 1083 J

To convert to MJ, we divide by 1,000,000: Q = 1.083 x 10^-3 MJ

Our answer has two significant figures and is negative because the gas is losing thermal energy.

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To calculate the heat (Q) for process D to B, we need to first understand the changes in thermal energy and work done by the gas during the process. As the temperature at state A is 20ºC or 293 K, we can use this as our initial temperature.

Process D to B involves a decrease in temperature, which means the thermal energy of the gas decreases. This change in thermal energy is given by the equation ΔE = mcΔT, where ΔE is the change in thermal energy, m is the mass of the gas, c is the specific heat capacity of the gas, and ΔT is the change in temperature.

As we don't have information about the mass and specific heat capacity of the gas, we cannot calculate ΔE. However, we do know that the change in thermal energy is equal to the heat transferred in or out of the system, which is represented by Q.

The work done by the gas during this process is given by the equation W = -PΔV, where W is the work done, P is the pressure, and ΔV is the change in volume. Again, we don't have information about the pressure and change in volume, so we cannot calculate W.

Therefore, we cannot calculate the heat (Q) for process D to B with the given information. We would need additional information about the gas and the specific process to calculate Q accurately.

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Answer: Rock slope failures can occur due to the presence of water; ice jacking occurs when water between joint or fissure surfaces freezes and expands. This type of failure is progressive, resulting in incremental weakening over time, often requiring several cycles before failure. Ice jacking is one form of rock erosion.

The number of unique rearrangements of the letters in the word "corridor" is 1,680.

To find the number of unique rearrangements of the letters in the word "corridor," we can calculate the factorial of the total number of letters. In this case, "corridor" has 8 letters.

The factorial of a number is the product of all positive integers from 1 to that number. In this case, the factorial of 8 is:

8! = 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 40,320

However, we need to consider that the letter "r" is repeated twice in the word "corridor." To account for the duplicate letters, we divide the total factorial by the factorial of the number of times the duplicate letters appear. In this case, we divide by the factorial of 2.

2! = 2 x 1 = 2

So, the number of unique rearrangements is:

40,320 / 2 = 20,160

Therefore, there are 20,160 unique rearrangements of the letters in the word "corridor."

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1. The force that makes a car traveling at 65mph slow down is primarily the force of friction, including air resistance, rolling resistance, and brake friction when the brakes are applied.

2. The device within the car that makes it speed up is the accelerator pedal. When driver presses the accelerator pedal, it controls the flow of fuel to the engine, increasing engine power and propelling car forward.

3. No, the car does not maintain a constant speed of exactly 65mph when the cruise control is set at that speed. There are various factors such as variations in road conditions, inclines, wind resistance, that can cause slight fluctuations in the car's speed.

4. The graph showing the speed of a car with the cruise control set at 65mph would display a relatively constant horizontal line around the desired speed of 65mph.

5. The computer in a cruise control system plays a crucial role in monitoring and controlling the car's speed. It receives input from various sensors such as speed sensors and throttle position sensors.

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A source of straight waves is a linear item attached to an oscillator that bobs back and forth in the water.

The crests and troughs of these straight waves alternate. On the sheet of paper beneath the tank, the crests are the long, dark lines, and the troughs are the short, brilliant lines.

These waves will propagate through the water until they run into a barrier, such the tank wall or a submerged object. In the illustration to the right, a line of waves traveling in a straight line are shown approaching a long barrier that is extending across the water tank at an angle.

The blue arrow indicates the direction in which these wavefronts (straight-line crests) are moving through the water.

Therefore, A source of straight waves is a linear item attached to an oscillator that bobs back and forth in the water.

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Answer:

A and D

Explanation:

Some particulates absorb the water vapor around them, and they are said to be hygroscopic.

Hygroscopic materials are able to attract and hold water molecules from their surrounding environment. This property is essential in various applications such as humidity control, moisture absorption, and preservation of certain products.

In the atmosphere, hygroscopic particulates play a crucial role in cloud formation and air quality. When water vapor is absorbed by these particles, they increase in size, which can lead to the formation of cloud droplets. This process is known as cloud condensation nucleation. The presence of hygroscopic particulates in the atmosphere can impact weather patterns, precipitation, and even climate.

Furthermore, hygroscopic materials can influence air quality by removing excess moisture from the air, which can help to maintain a comfortable and healthy environment. They can also reduce the likelihood of mold growth and other issues related to excess humidity. However, it is important to note that some hygroscopic particles, such as certain pollutants, can have negative effects on air quality and human health when present in high concentrations.

In summary, hygroscopic particulates have the ability to absorb water vapor from their surroundings, playing a significant role in various environmental processes such as cloud formation, humidity control, and air quality.

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The work done by the force is √7 Newtons. The result is obtained by multiplying the distance by the force.

The work done on an object can be counted by the equation:

W = F × d

Where

Find the work done by the force!

We have:

The distance (straight line) is

\(d = \sqrt{(x_{1}- x_{2})^{2} + (y_{1}- y_{2})^{2} + (z_{1}- z_{2})^{2} }\)

\(d = \sqrt{(9-19) + (-7 + 5) + ((-10) - (-9)) }\)

\(d = \sqrt{(10) -2 + (-1 )\)

d = √7 meters

The force is F.

Hence, the magnitude of the force on the object are √7 F.

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The wavelength of the visible light that is most strongly reflected by the soap bubble is 633 nm.

(a) The wavelength of the visible light that is most strongly reflected by a soap bubble can be found using the equation for the thickness of the soap film at which constructive interference occurs:

2nt = mλ

where n is the refractive index of the soap film, t is the thickness of the film, m is an integer representing the order of the interference, and λ is the wavelength of the light.

For the visible spectrum, we can assume that the light is monochromatic and has a wavelength of 550 nm (yellow-green light). Substituting the given values, we can solve for the value of m:

2(1.28)(107 nm) = m(550 nm)

m = 4.01

Since m must be an integer, the closest integer value to 4.01 is 4. Therefore, the order of the interference is 4. Substituting this into the equation, we can solve for the wavelength of the light:

2(1.28)(107 nm) = 4(λ)

λ = 633 nm

Therefore, the wavelength of the visible light that is most strongly reflected by the soap bubble is 633 nm.

(b) A bubble of different thickness could also strongly reflect light of the same wavelength if the difference in thickness between the two bubbles is an integer multiple of the wavelength of the light.

This is because the condition for constructive interference depends on the path difference between the two rays of light reflecting off the two surfaces of the bubble. If the path difference is an integer multiple of the wavelength, the two rays will interfere constructively and produce a strong reflection.

(c) To find the two smallest film thicknesses larger than 107 nm that can produce strongly reflected light of the same wavelength, we can use the same equation as in part (a) and solve for the thickness t when m = 5 and m = 6:

2(1.28)t = 5(633 nm)

t = 196.5 nm

2(1.28)t = 6(633 nm)

t = 235.8 nm

Therefore, the two smallest film thicknesses larger than 107 nm that can produce strongly reflected light of the same wavelength as in part (a) are 196.5 nm and 235.8 nm.

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26 seconds per meter

Answer:

0.038m/s

Explanation:

5.0/130=0.038m