A solenoid made out of cylindrical copper wire has exactly 8000 turns, a length of 0.647 m, and a radius of 1.60 cm.

Answer:

hey from what I know the answer is C

Explanation:

When a book is kept on a table , weight (gravitational force) of book acts on table vertically downwards and as a reaction of weight , table also exerts an equal and opposite ( upward) force on book .

The wavelength of a wave with a frequency of 500 Hz that is traveling at a speed of 200 meters per second is 0.4 meters (m).

A wave is a disturbance that travels through space and matter, transferring energy from one location to another without actually moving any matter. Light waves, sound waves, and water waves are some examples of waves. Waves can be characterized by their amplitude, frequency, and wavelength. Wavelength is the distance between two corresponding points on a wave, such as two peaks or two troughs. It is represented by the symbol λ (lambda) and is measured in meters.

The wavelength of a wave can be calculated using the formula:

λ = v/f Where λ is the wavelength, v is the speed of the wave, and f is the frequency of the wave. Given that a wave with a frequency of 500 Hz is traveling at a speed of 200 meters per second, the wavelength can be calculated as follows:

λ = v/fλ

  = 200/500λ

  = 0.4 m

Therefore, the wavelength of the wave is 0.4 meters (m).

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Answer:

a, Vì E0// AC

⇒UBC=UBA=120V

⇒UAB=−120V

Hình chiếu của AC lên E0=0

nên AC=0

E0=UBABA=1200,06.cos60=4000V

/m

Explanation:

Not sure but hope it helps

Answer:

25 N  in the direction of your push

Explanation:

The friction force acts against your pushing force....it reduces the net amount of force you are exerting

Net force =  40 - 15 = 25 N  

Answer: Collinear forces are forces that have a common line of action, i.e. the line of action of the forces lies along a single straight line.

Explanation:

The word that best describes something that works in the same way as a radar is "sonar".

Sonar is an acronym for "sound navigation and ranging," and it is a technology that uses sound waves to detect and locate objects underwater. Sonar works by emitting a sound wave or pulse and then measuring the time it takes for the sound to bounce back from an object and return to the source. This information is then used to calculate the distance to the object and its location. Like radar, sonar is used in a variety of applications, including military, scientific, and commercial.

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Answer:

Centripetal acceleration = 46.26m/s2

Tension = 4.6N

Explanation:

Centripetal acceleration is given by the following formula: \(a_c = \frac{v^2}{r}\)

So, to calculate acceleration we first need velocity and radius.

The radius is given to us as 75cm = 0.75m, and we can find velocity from the following formula:\(v=r\omega\) where w = the angular velocity given by: \(\omega = \frac{2\pi}{T}\)

We are given a period of 0.80s, meaning that our angular velocity is:

\(\frac{2\pi}{0.80} = 7.85 rad s^{-1}\)

Now we just need to multiply is by the radius to find the velocity:

\(0.75*7.85=5.89ms^{-1}\)

Finally we square the velocity and divide by the radius to find the final centripetal acceleration: \(\frac{5.89^{2} }{0.75} =46.26ms^{-2}\)

\(F=\frac{mv^{2} }{r}\) so we just need to multiply the centripetal acceleration by mass to get the tension force of the string: \(46.26*0.1 = 4.6N\)

Hope this helped!

Answer:

P = E / t      definition of power

P = (1/2 m v2^2 - 1/2 m v1^2) / t

P = m / (2 * t) * (v2^2 - v1^2)

P = 1300 kg / 6 sec * (17.9^2 - 13.4^2)

P = 217 * 141 = 30,600 J/sec

The power required to pass the slow-moving truck is 34,905 watts.

Power is a physical quantity that measures the rate at which work is done or energy is transferred. It is defined as the amount of energy transferred or work done per unit time. The SI unit of power is watts (W), which is equivalent to joules per second (J/s).

In simpler terms, power is the rate at which energy is used or work is done. It is a measure of how quickly something can accomplish a certain task or transfer energy. The greater the power of a system, the faster it can perform a given amount of work.

Power = Work done / time taken = Force x distance/time taken

Here in the Question,

To calculate the power required to pass the slow-moving truck, we need to use the formula:

Power = Force x Velocity

where Force is the net force acting on the car and Velocity is the final velocity of the car after acceleration.

To find the force, we can use Newton's second law of motion:

Force = mass x acceleration

where mass is the mass of the car and acceleration is the change in velocity over time.

Given:

Initial velocity, u = 13.4 m/s

Final velocity, v = 17.9 m/s

Time, t = 3 s

Mass of car, m = 1300 kg

The acceleration can be calculated using the formula:

Acceleration = (Final velocity - Initial velocity) / Time

Acceleration = (17.9 m/s - 13.4 m/s) / 3 s

Acceleration = 1.5 m/s^2

Now we can calculate the force:

Force = mass x acceleration

Force = 1300 kg x 1.5 m/s^2

Force = 1950 N

Finally, we can calculate the power required to pass:

Power = Force x Velocity

Power = 1950 N x 17.9 m/s

Power = 34,905 W

Therefore, the power required to pass the slow-moving truck is 34,905 watts (or approximately 35 kW).

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The potential difference between the plates of a capacitor changes when the plates are pulled apart. As the capacitor plates are slowly separated from each other, the potential difference between the plates decreases.

The correct answer is option (c).The electric potential difference decreases because plate separation increases, the electric field between the plates decreases. As the plates are separated, the distance between them increases, causing the electric field to weaken. As a result, the potential difference decreases. The capacitance of the capacitor does not change, as it depends on the size and shape of the plates, the distance between them, and the permittivity of the dielectric used. If the plates are brought closer together or moved away from each other, the capacitance remains unchanged. The electric potential difference decreases because plate separation increases, the electric field between the plates decreases. the capacitor is a device that stores electrical energy in the form of an electric field. It consists of two parallel conductive plates, with a dielectric material in between them. When a voltage is applied to the capacitor, it charges up, and stores energy.
The amount of energy that can be stored depends on the capacitance of the capacitor, which is determined by the size and shape of the plates, the distance between them, and the permittivity of the dielectric used. When the plates are pulled apart, the distance between them increases, and the electric field between them decreases. As a result, the potential difference between the plates decreases. This happens because the electric field is proportional to the potential difference, and inversely proportional to the distance between the plates. The capacitance of the capacitor does not change when the plates are moved, as it depends only on the physical properties of the capacitor. the electric potential difference decreases as plate separation increases, due to the decrease in electric field between the plates.

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Kilowatt hours are a unit of measurement for the energy required to heat a house. It is the amount of energy used every hour. Hence option B.

Power is a tangible measure of how much work or energy is expended in a certain amount of time. Therefore, power is the rate at which an object expends energy or performs work. Watt is the definition of power. The joule is a unit of both work and energy.

Kilowatts are the unit of measurement for power for higher energy usage. Power input and time are the components of work or energy.

W in J hence equals power in Watt/time in hours.

Kilowatts hours are the unit used to measure domestic energy use. Hence, option B is our answer.

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The temperature change produced when 0.35 kg of water is heated using 9600 J is 6.34 °C.

What is Specific Heat Capacity?

Specific heat capacity is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or one Kelvin). It is a measure of the substance's ability to store heat energy. The specific heat capacity is a physical property of the substance and is usually denoted by the symbol c.

The amount of heat required to raise the temperature of a substance is given by the formula:

Q = mcΔT

where Q is the amount of heat energy transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

In this problem, we are given:

m = 0.35 kg (mass of water)

c = 4200 J/kg/°C (specific heat capacity of water)

Q = 9600 J (amount of heat energy transferred)

We can rearrange the formula to solve for ΔT:

ΔT = Q/(mc)

Substituting the given values, we get:

ΔT = (9600 J) / (0.35 kg x 4200 J/kg/°C)

ΔT = 6.34 °C

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The friction force acting on the firefighter sliding down a vertical pole is approximately 222.6 N.

To find the friction force, we need to analyze the forces acting on the firefighter. In this case, the firefighter is sliding down a vertical pole, so the gravitational force (mg) is acting downward. Additionally, there is a friction force (f) acting in the upward direction opposing the motion.

According to Newton's second law, the net force acting on an object is equal to the product of its mass and acceleration. In this case, the net force is the difference between the gravitational force and the friction force:

Net force = mg - f

Given:

Mass of firefighter (m) = 78 kg

Acceleration (a) = 3.0 m/s²

We can rearrange the equation to solve for the friction force:

f = mg - ma

Substituting the given values, we have:

f = (78 kg)(9.8 m/s²) - (78 kg)(3.0 m/s²)

Calculating the expression, we find that the friction force is approximately 222.6 N.

Therefore, the friction force acting on the firefighter sliding down the vertical pole is approximately 222.6 N. It opposes the motion and helps control the acceleration of the firefighter.

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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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Answer:

Too what i know its because of the air

Explanation:

The steel rod is more dense and doesnt have air whil'st the oil tanker is less dense with lots of air

Measuring current in series is essential because it ensures that the current passing through each component in the circuit is the same. In a series circuit, there is only one path for the current to flow, which means that the current measured at any point is the same throughout the entire circuit.

If you were to connect a current probe in parallel, you would create an additional path for the current to flow, which could lead to an inaccurate measurement. Connecting the probe across the resistor (opposite sides) in parallel would essentially create a short circuit, bypassing the resistor and causing a potentially dangerous situation with increased current flow, potential damage to the circuit, and an incorrect current reading.

Therefore, it's essential to measure current in series to ensure accuracy and maintain the safety of the circuit.

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Answer:

acceleration is 18

Explanation:

45N/3kg=18

Answer:

18

Explanation:

The speed of the wave is 11 m/s, the wavelength is 1 m, and the period is 0.1 seconds.

The given information describes the characteristics of a wave. The speed of the wave, which represents how fast it propagates through a medium, is stated as 11 m/s. The wavelength, which is the distance between two consecutive points in the wave that are in phase, is mentioned as 1 m. The period, which refers to the time it takes for one complete cycle of the wave, is given as 0.1 seconds.

These parameters are fundamental properties of a wave and are interconnected through the wave equation: speed = wavelength / period. Understanding these values helps in analyzing the behavior and properties of the wave, such as its frequency and amplitude, and allows for further exploration of wave phenomena in various fields, including physics and engineering.

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Answer:

A. Cue, White Ball, Blue Ball

Explanation:

Visualize in which order things are being hit

Answer:

Dietz

Explanation:

He is the guy you must justt be smart and know stuff.

The response is: A. The current density in Example 1 is the largest, but it is lower in Cases 2 and 3 for resistors.

The amount of current flowing through a resistor expressed as a percentage of its cross-sectional area is known as its current density. As a result, the resistor's cross-sectional area and current density are inversely related.

The current density in Case 1 is simply I/A1, where A1 is the cross-sectional area of R1, since R1 is the sole resistor present.

The cross-sectional area of R2 in Case 2 is twice that of R1, hence its current density is I/A2, where A2 = 2A1. As a result, in Case 1, the current density via R1 is I/(2A1), while the current density through R2 is I/(2A1).

In Example 3, R3 is three times longer but has the same cross-sectional area as R1. As a result, the resistance of R3 is three times greater than that of R1, resulting in an I/3 current flow through it. Hence, (I/3)/A1 = I/(3A1) is the current density through R3, which is also less than the current density through R1 in Case 1.

The response is: A. The current density in Example 1 is the largest, but it is lower in Cases 2 and 3.

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Answer:

D. The tea loses heat to the spoon causing the spoon to become warmer

Explanation:

When the silver spoon at a lower temperature than the tea, is added to the tea, it makes thermal contact. Hence, the heat transfer starts between the two until the equilibrium is reached. We know that the heat transfer takes place from the body with a higher temperature to a body with a lower temperature. As a result, the body with higher temperature loses heat and its temperature lowers down. While the body with a lower temperature gains heat and its temperature rises.

Therefore, the correct option is:

D. The tea loses heat to the spoon causing the spoon to become warmer

The 3 function options in the what-if-anlysis dropdown are data table, scenario manager and goal seek.

The three function options in the ”What-If Analysis” dropdown menu typically found in spreadsheet software like Microsoft Excel are:

1. Data Table: This option allows you to create a table that shows the impact of changing one or two input variables on the results of a formula. It is useful for conducting sensitivity analysis and understanding how changes in input values affect the final outcome.

2. Scenario Manager: This option enables you to create and manage different scenarios by specifying different sets of input values. It allows you to compare and analyze the results of different scenarios without modifying the original data or formulas directly.

3. Goal Seek: This option helps you find the input value needed to achieve a specific goal or target result in a formula. It allows you to specify a desired outcome and Excel will determine the value of an input variable required to achieve that result.

These functions provide tools for performing various types of “what-if” analyses, allowing you to explore different scenarios, evaluate the impact of changes, and determine the necessary inputs to achieve desired outcomes within your spreadsheet models.

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Answer:

Explanation:

All the work done by the friction force results in a transfer of energy into thermal energy of the box-floor system. This thermal energy flows as heat within the box and floor, ultimately raising the temperature of both of these objects.

Answer:

Fgrav. = GM1×M2/R2

Explanation:

Gravitational force is mostly related

to planetary bodies by Newton's law of gravitation which states that the gravitional force is proportional to the product of the mass of the object and inversely proportional to the square of the distance between them.

Hence in this case the Gravitational force,

Fgrav. = GM1×M2/R2

M1 and M2 are the mass of the two students and R is their distance apart

G is a constant known as gravitational constant.6.67408 × 10-11 m3/kgs2

Signals generated by transducers are normally of the order of microvolts to millivolts.

What are transducers?

Transducers are electrical components that transform energy from one form into another. They are electrical sensors that generate an electrical signal based on the quantity being assessed.

A transducer is a device that transforms a physical quantity such as force, pressure, or temperature into an electrical signal. This electrical signal can then be amplified, filtered, or measured in other ways.

Some common examples of transducers include microphones, strain gauges, accelerometers, and thermocouples.

What are the signals generated by transducers?

The signals generated by transducers are normally of the order of microvolts to millivolts. The magnitude of the signal generated depends on the quantity being assessed, as well as the type and sensitivity of the transducer.

In order to use the signal generated by a transducer, it is usually necessary to amplify and filter the signal to remove noise and unwanted frequencies. This can be done using an amplifier or other signal processing equipment.

Overall, the signals generated by transducers are a crucial part of many electronic systems and are used in a wide variety of applications.

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Answer:

force is the total impact of one object on another, whereas pressure is the physical quantity of force spread over a certain area.

Explanation:

hope it helps <33

have a good day :)

brainliest plz?

Explanation:

: A force can be a push or a pull. When a force is exerted on an object it can change the object's speed, direction of movement or shape.

: Pressure is the amount of force per unit of area

Pressure can be found using the equation pressure = force / area

The maximum angular displacement of the pendulum is ±0.28 radians, and the rate of change of θ at t = 4 seconds is approximately -0.268 radians per second.

The equation given for the angular displacement of the pendulum is θ = 0.28sin(4t). We can analyze this equation to find the maximum angular displacement and the rate of change of θ at a specific time.

The maximum angular displacement (θ_max) of a sine function occurs when the argument of the sine function is equal to ±1. In this case, the argument is 4t. To find θ_max, we substitute ±1 into the equation:

θ_max = 0.28sin(4t) = 0.28sin(4t_max) = ±0.28

Therefore, the maximum angular displacement is θ_max = ±0.28 radians.

To find the rate of change of θ when t = 4 seconds, we need to differentiate the equation with respect to time:

dθ/dt = 0.28cos(4t)

Substituting t = 4 seconds into this equation:

dθ/dt = 0.28cos(4(4)) = 0.28cos(16) ≈ 0.28 * (-0.959) ≈ -0.268 radians per second

So, when t = 4 seconds, the rate of change of θ is approximately -0.268 radians per second.

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The answer will be interpersonal.

According to Gardner there are 8 types of intelligence, one of those being Interpersonal intelligence.

This type of intelligence is related to the ability to interact and understand people and their relationships.Empathy is a concept related to this type of intelligence.

Thus the answer will be interpersonal.

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