an intern pushes a 72-kg patient on a 15-kg gurney, producing an acceleration of 0.60 m/s2 . how much work will the intern do by pushing the patient and gurney through a distance of 2.5 m if the kinetic friction between the gurney wheels and the floor is 25 n?

When the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

From the question, we have

Voltage in the circuit, V = 1.5 volts,

The circuit's resistance, R = 50,

In the third diagram, the bulb is connected in parallel, which means that the voltage in the circuit will remain constant. Additionally, because the current depends on the resistor, the resistance in this circuit will be larger.

Additionally, according to Ohm's law, a high resistance will result in a low current flow.

Since there is only one bulb in the first circuit, resistance will be minimal and current flow will be high.

As a result, the third circuit's resistance would be the highest and its current the lowest when the switch is closed.

Current :

The phrase "electric current" is frequently used to describe how much electricity flows through a circuit and how it flows in an electronic circuit. Amperes are used to measure it (A). As more electricity passes through the circuit, the ampere value increases.

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When the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

What is current?

When describing how much electricity flows through a circuit and how it flows in an electronic circuit, the term "electric current" is often employed. It is measured in amperes (A). The ampere number rises as more electricity flows through the circuit.

Given:

The Voltage in the circuit, V = 1.5 volts,

The resistance in the circuit, R = 50 Ω,

As you can see in the third diagram, there is a parallel connection of the bulb, so the voltage in the circuit will remain the same and the current depends on the resistor, so there will be higher resistance in this circuit.

And if the resistance is high the current flow will be low, (By Ohm's law)

In the first circuit, there is only one bulb, so resistance will be low, and the current flow will be high.

Therefore, when the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

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The new electrostatic force will be 384 units.  

The electrostatic force of attraction between two charges \(q_{1} \\\)(charge of object 1)  and \(q_{2}\)(charge of object 2) separated by a distance d is given by

\(F = \frac{q_{1} q_{2}}{4\pi E_{0} d^{2} } \\\)

\(E_{0} = 8.854 * 10^{-12} C^{2} N^{-1} m^{-1}\) is the permittivity of free space.

Initially, we have,

\(\frac{q_{1} q_{2}}{4\pi E_{0} d^{2} } =F_{1} = 8 units\)  

Now, if the charge of object 1 is multiplied by 1, the charge of object 2 is multiplied by 3, and the distance separating objects 1 and 2 is divided by 4, we have, \(q_{1} =q_{1}, q_{2} =3q_{2} , d=\frac{d}{4}\).

The new electrostatic force will be,

\(F_{2} = \frac{q_{1} 3q_{2}}{4\pi E_{0} (\frac{d}{4} )^{2} } \\\\\) units.

We have, \(F_{1} = 8 units= \frac{q_{1} q_{2}}{4\pi E_{0} d^{2} } \\\)

Hence,

\(F_{2} =\frac{8*3}{(\frac{1}{4}) ^{2} } units= 384 units.\)

Hence, the new electrostatic force will be 384 units.

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The de broglie wavelength of an electron accelerated by a potential of 1000 v is 2.212 x 10⁻¹¹ m. The de broglie wavelengthof a proton accelerated by potential of 1000 v 0.9×10 ⁻¹² m

The de Broglie wavelength is a concept in quantum physics which states that all matter has a wave-like character, and may thus be described as a wave.

A particle's de Broglie wavelength () is determined by the equation = h/p, where h is the Planck constant (6.626 x 10⁻³⁴ J.s.) and p is the particle's momentum.

The equation p = eV/c, where e is the electron charge (1.602 x 10⁻¹⁹ C) and c is the speed of light (2.998 x 10⁸ m/s), gives the momentum of an electron with a 1000-V potential drop.

The de broglie wavelength  of an electron accelerated by a potential of 1000 v will be

λ = h/(eV/c)

= (6.626 x 10⁻³⁴ J.s) / (1.602 x 10⁻¹⁹ C x 1000 V)/2.998 x 10⁸ m/s

= 2.212 x 10⁻¹¹ m.

The de broglie wavelength of an proton accelerated by a potential of 1000 v will be

λ = h /√ 2mV e

λ=                      6.6×10 −34                      =0.9×10 ⁻¹² m

         2×1.6×10 −27 ×1.6×10 −19 ×1000

​

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Answer:

Force of kinetic friction, Fk = 6N

Explanation:

Given the following data;

Coefficient of kinetic friction, μ = 0.2

Normal force, Fn=30N

To find the Force of kinetic friction;

Mathematically, the force of kinetic friction is given by the formula;

Fk = μFn

Where;

Substituting into the equation, we have;

Fk = 0.2*30

Fk = 6N

Therefore, the force of kinetic friction is 6N.

A force that is present between two moving objects or surfaces is called kinetic friction. It is estimated in newtons (N) and is calculated by:

\(\rm F_{k} =\rm \mu _{\rm k} F_{n}\)

Where, \(\rm F_{k}\) = frictional force,  \(\mu _{\rm k}\)  = coefficient, \(\rm F_{n}\) = normal force.

The kinetic friction of the object is 6N.

The kinetic friction can be estimated as:

Given,

Substituting values in the formula:

\(\rm F_{k} =\rm \mu _{\rm k} F_{n}\)

\(\begin{aligned}\rm F_{k} &= 0.2 \times 30\\\\\rm F_{k} &= 6 \rm N\end{aligned}\)

Therefore, 6N is the frictional force.

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It is the product of the length and the linear charge density.

Linear charge density is defined as the amount of charge per unit length of the rod. Therefore, if we know the length of the rod and its linear charge density, we can easily calculate the amount of charge on that length of the rod by multiplying the two values.For example, if a rod is 2 meters long and has a linear charge density of 5 C/m, the amount of charge on the rod would be:Charge = Length x Linear Charge Density Charge = 2 m x 5 C/m Charge = 10 C .

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The correct answer is b. It is the product of the length and the linear charge density.

The amount of charge on a certain length of a rod that is uniformly charged can be determined by multiplying the length of the rod by its linear charge density. Linear charge density is defined as the amount of charge per unit length, and is expressed in units of Coulombs per meter (C/m). By multiplying the linear charge density by the length of the rod, we can determine the total amount of charge present on the rod. For example, if a rod has a linear charge density of 5 C/m and a length of 2 meters, the amount of charge on the rod would be 10 Coulombs (5 C/m x 2 m = 10 C). Therefore, option b is the correct answer as it describes the relationship between the charge and length of a uniformly charged rod.

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Answer:

Newton' second law  and third law describes the situation.

Explanation:

According to the Newton's second law, the force applied on a body is proportional to the rate of change of momentum of the body.

According to the Newton's third law, for every action there is an equal and opposite reaction.

When ice skater pushes harder means more force is applied so he moves fast and more be the action force more be the reaction force.

Thus, Newton' second law  and third law describes the situation.

The net force on the box perpendicular to the floor is

∑ F[perp] = F[normal] - mg = 0

where mg is the weight of the box. Then

F[normal] = mg = 147 N

so that

F[friction] = 0.3 F[normal] = 44.1 N

The net force parallel to the floor is

∑ F[para] = F[applied] - F[friction] = ma

where a is the acceleration of the box. Then

F[applied] = (15 kg) a + 44.1 N

Then the work done by the applied force is

W[applied] = ((15 kg) a + 44.1 N) (1 m) = (15a + 44.1) J

We can't find the exact amount of work without any more information. If the box is pulled with constant speed, then a = 0 so the work would be 44.1 J.

Answer:

3. Large butterfly in flight, flying through the air?

Explanation:

Momentum is simply defined as the quantity of motion a body possess. It is mathematically given as;

 Momentum  = mass x velocity

The larger the mass, the larger the momentum and also the velocity

Since the large butterfly is in flight, it has the largest velocity.

A sleeping bear and resting caterpillar have no momentum because their velocity is 0

It takes around 4 seconds for the camera ro fall 250 feet

use the quadratic formula where a=-16 b=0 and c=250

The correct answer of terrestial weather:

The solar insolation in the visible and infrared regions of the solar electromagnetic spectrum is much more than the energy that space weather occurrences release into the troposphere and stratosphere. Despite claims to the contrary, there may be some connection between the Earth's climate and the 11-year sunspot cycle. There is no proof of this. For instance, it has frequently been suggested that the Maunder minimum, a 70-year period almost devoid of sunspots, is correlated to a cooler climate, but these correlations have vanished after further research. Changes in cosmic ray flux are hypothesized to affect how much cloud formation occurs.

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The first gear set (12-72) provides a speed increase of 6, and the second gear set (8-64) further increases the speed by a factor of 8, resulting in an overall speed increase of 48.

To design a compounded reverted gear train as a step-up gear with a speed increase of 48 times while minimizing the gearbox size and avoiding interference problems, we need to carefully select the numbers of teeth for the gears.

The compounded reverted gear train consists of two sets of gears: the first set is the compound gear train, and the second set is the reverted gear train. The compound gear train is used to achieve a moderate speed increase, and the reverted gear train further amplifies the speed.

To determine suitable numbers of teeth, we can start by considering the speed increase ratio of 48. This ratio can be achieved by breaking it down into smaller ratios for the compound and reverted gear sets. For example, we can choose a speed increase ratio of 6 in the compound gear train and a ratio of 8 in the reverted gear train.

Next, we need to select suitable numbers of teeth for each gear to avoid interference problems and ensure smooth operation. To minimize gearbox size, we aim to keep the gears as small as possible. One approach is to use gears with a small number of teeth, which can help reduce their size.

For the compound gear train, we can select gears with, for example, 12 and 72 teeth. This gives a speed increase ratio of 6. For the reverted gear train, we can choose gears with 8 and 64 teeth, resulting in a speed increase ratio of 8.

The sketch of the designed compounded reverted gear system would show the gear positions and their numbers of teeth as follows:

     ----    12 teeth    ----

   /                              \

--- 72 teeth 8 teeth ---

\ /

      ---- 64 teeth ----

In this configuration, the first gear set (12-72) provides a speed increase of 6, and the second gear set (8-64) further increases the speed by a factor of 8, resulting in an overall speed increase of 48. By carefully selecting the numbers of teeth and the gear ratios, we can achieve the desired speed increase while minimizing the size of the gearbox and avoiding interference problems between the gear teeth.

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The wavelength of waves 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. The wavelength of the waves with a frequency of 0.50 Hz and a speed of 4.0 m/s is 8.0 meters.

In this case, the frequency of the waves is given as 0.50 Hz and the speed is given as 4.0 m/s.
Substituting these values in the formula, we get:
λ = 4.0 m/s / 0.50 Hz
λ = 8.0 m
It is important to note that the wavelength of a wave is directly proportional to its frequency and inversely proportional to its speed. This means that if the frequency of the wave increases, its wavelength also increases, while if the speed of the wave increases, its wavelength decreases.
Understanding the relationship between wavelength, frequency, and speed of waves is crucial in various fields, including physics, engineering, and telecommunications. These concepts are used to design and optimize systems that rely on the transmission and reception of waves, such as radios, televisions, and satellite communications.

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Answer:

dyow

Explanation:

sorrrey

The magnitude of the magnetic field halfway between the wires is 2.14×\(10^{-5\) T.

The magnitude of the magnetic field halfway between the wires can be calculated using the formula:

B = μ0I1I2/(2πd)

where B is the magnetic field, μ0 is the permeability of free space, I1 and I2 are the currents in the two wires, and d is the distance between the wires.

Plugging in the given values, we get:

B = (4π T*m/A) * (13.0 A) * (23.0 A) / (2π * 0.456 m)

B = 2.14×\(10^-5\) T

Therefore, the magnitude of the magnetic field halfway between the wires is 2.14×\(10^-5\)T.

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Three different people weigh a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 g for the mass of the standard. These results imply that the balance that was used is neither accurate nor precise.

The question states that three different people weigh a standard mass of 2.00 g on the same balance. However, each person obtains a reading of 7.32 g for the mass of the standard. This result is unexpected because the actual mass of the standard is known to be 2.00 g.

If the balance were accurate and functioning correctly, each person should have obtained a reading close to the actual mass of 2.00 g. The fact that all three individuals obtained the same reading of 7.32 g suggests that there is a systematic error or issue with the balance.

There are several possible explanations for the discrepancy:

1. Calibration Error: The balance may be improperly calibrated. Calibration involves adjusting the balance to ensure accurate measurements. If the balance is not calibrated correctly, it can lead to inaccurate readings.

2. Zero Error: The balance might have a zero error, meaning that it does not read zero when there is no mass on the pan. This can cause all subsequent measurements to be incorrect by a consistent amount.

3. Faulty Measurement Mechanism: The internal components of the balance responsible for measuring mass, such as the springs or sensors, may be malfunctioning or damaged. This can lead to inaccurate readings.

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Ptolemy was important in the history of astronomy because he developed a model of the solar system that made sufficiently accurate predictions of planetary positions to remain in use for many centuries. Correct answer: letter C.

Ptolemy was an ancient Greek scientist who developed a model of the solar system that placed the Sun at the center, rather than the Earth. This model was able to make sufficiently accurate predictions of planetary positions to remain in use for many centuries, and was thus an important part of the history of astronomy.

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Answer:

50 meters

Explanation:

Let's start by converting to m/s. There are 3600 seconds in an hour and 1000 meters in a kilometer, meaning that 72km/h is 20m/s.

\(v_f=v_o+at\)

Since the car starts at rest, you can write the following equation:

\(20=0+a(5) \\\\a=20\div 5=4 m/s^2\)

Now that you have the acceleration, you can do this:

\(d=v_o+\dfrac{1}{2}at^2\)

Once again, there is no initial velocity:

\(d=\dfrac{1}{2}(4)(5)^2=2 \cdot 25=50m\)

Hope this helps!

Answer:

The woman's weight at a height of one Earth radius above the surface is approximately 98.67 N.

Explanation:

At a distance of one Earth radius from the surface, the woman's height above the Earth's surface is approximately 6,378,000 meters (assuming the Earth is a perfect sphere).

The gravitational force between the woman and the Earth is given by the formula:

F = G * (m1 * m2) / r^2

where F is the force of gravity, G is the gravitational constant, m1 is the mass of the Earth, m2 is the mass of the woman, and r is the distance between the centers of the Earth and the woman.

Since the woman's weight is the gravitational force that the Earth exerts on her, we can solve for her weight by setting m2 equal to her mass and plugging in the appropriate values:

F = (6.67430 × 10^-11 m^3/kg s^2) * [(5.97 × 10^24 kg) * (400 N) / (6,378,000 m + 6,378,000 m)^2]

F = 98.67 N

Therefore, the woman's weight at a height of one Earth radius above the surface is approximately 98.67 N.

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Answer:

Part A) The maximum energy stored in the capacitor, Emax is 4.19 x 10^-4 J.

Part B) The number of times per second that it contains this energy is 2.18 x 10^6 s^-1.

Explanation:

Part A:

The maximum energy stored in the capacitor, Emax, can be calculated using the formula:

Emax = 0.5*C*(Vmax)^2

where C is the capacitance, Vmax is the maximum voltage across the capacitor, and the factor of 0.5 comes from the fact that the energy stored in a capacitor is proportional to the square of the voltage.

To find Vmax, we can use the fact that the maximum current in the inductor occurs when the voltage across the capacitor is zero, and vice versa. At the instant when the current is maximum, all the energy stored in the circuit is in the form of magnetic energy in the inductor. Therefore, the maximum voltage across the capacitor occurs when the current is zero.

At this point, the total energy stored in the circuit is given by:

E = 0.5*L*(Imax)^2

where L is the inductance, Imax is the maximum current, and the factor of 0.5 comes from the fact that the energy stored in an inductor is proportional to the square of the current.

Setting this equal to the maximum energy stored in the capacitor, we get:

0.5*L*(Imax)^2 = 0.5*C*(Vmax)^2

Solving for Vmax, we get:

Vmax = Imax/(sqrt(L*C))

Substituting the given values, we get:

Vmax = (1.10 A)/(sqrt(0.420 H * 0.280 nF)) = 187.9 V

Therefore, the maximum energy stored in the capacitor is:

Emax = 0.5*C*(Vmax)^2 = 0.5*(0.280 nF)*(187.9 V)^2 = 4.19 x 10^-4 J

Part B:

The frequency of oscillation of an L-C circuit is given by:

f = 1/(2*pi*sqrt(L*C))

Substituting the given values, we get:

f = 1/(2*pi*sqrt(0.420 H * 0.280 nF)) = 2.18 x 10^6 Hz

The time period of oscillation is:

T = 1/f = 4.59 x 10^-7 s

The capacitor will contain the amount of energy found in part A once per cycle of oscillation, so the number of times per second that it contains this energy is:

1/T = 2.18 x 10^6 s^-1

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Answer:

você tem um camping de em Rio do Rio de Janeiro ou em lojas em SP e SP e RJ e região metropolitana de Porto Velho de Porto Velho Rio

Long distance running is the physical activity I engage in now, and there are a number of items and programs that can greatly improve my performance.

A GPS powered watch is one such item which I think is quite useful. I can monitor my speed, distance, heart rate and other important information while running with this device. This data lets me change my pace, track my effort, and make sure I stay within my desired heart rate range. The watch also provides post-run analysis, which I can use to identify my weaknesses and modify my training appropriately. In my opinion, GPS running watches have changed the game by allowing me to run harder and push my physical limits.

A strength training program designed for runners has also been very helpful in enhancing my performance. The program's primary emphasis is on functional workouts that target the major running muscle groups, such as the core, glutes and legs.

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Answer:

Explanation:

Work done on the lever ( input energy ) = force applied x input distance

= 24 N x 2m = 48 J

Work done by the lever ( output energy ) = load x output distance

= 72 N x 0.5m = 36 J

efficiency = output energy / input energy

= 36 J  / 48 J

= 3 / 4 = .75

In percentage terms efficiency = 75 % .

Answer:

Explanation:

arc length

el huevo so el cuerpo es calvario y fiebre

The given statement "Sensory stimuli activate receptors, which generate action potentials that are sent into the Central Nervous System (CNS)." is true. These action potentials carry information from various sensory receptors to the CNS for processing and response.

Any event or thing that is perceived by the senses and causes a person to react is referred to as a sensory stimulus. The stimulus may take many different forms, including light, heat, sound, touch, and internal elements. We get sensory stimuli and information from the environment through sensory receptors located throughout our bodies. Our hands, feet, lips, mouth, tongue, eyes, ears, nose, and skin all have a significant number of these sensory receptors. Each of the seven senses has a different set of seven types of receptors.

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The armature needs to rotate 360 degrees for one complete cycle of AC sine wave.

In a two-field pole single-phase AC generator with one north and one south field, the armature has to rotate 360 degrees or one full revolution to complete one cycle of the AC sine wave. This is because the magnetic field in the generator changes polarity twice in each cycle, and the armature has to complete one full revolution to experience both north and south fields. Therefore, it takes 360 degrees of mechanical rotation for the armature to generate one complete cycle of AC sine wave in a two-field pole single-phase AC generator.

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In physics, velocity and speed are similar but separate ideas. Speed, which is a scalar quantity, describes the extent of motion or the rate at which an item shifts in space.

A satellite is a body that orbits a planet, star, or moon. For instance, the fact that Earth orbits the sun makes it a satellite.

In physics, velocity and speed are similar but separate ideas. Speed, which is a scalar variable, describes the amount of motion or the rate at which an item shifts in space.

The satellite's speed, which is a scalar measurement of the magnitude of motion, is 100 m/s when it is moving in a circle.

However, because the satellite is moving in a circular path and its velocity has both a magnitude and a direction, it is continually varying.

The satellite's velocity is always moving in the direction of the circle's center, and its magnitude is equal to its speed, or 100 m/s.

Thus, this the comparison of satellites speed and velocity.

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Answer:

5v

Explanation:

W = 10J ;Q = 2C ;V = ?

So,potential between x and y is 5v

Hope it will help you if not so please sorry.