A boy weighs 400 N. What is his mass?

option "C". 'ε​​​​​0​​' is the permittivity of free space,'A' the area of each plate, and,'d' is the distance between the plates,Hence, to get capacitance C/2, we can decrease the area of the plates by a factor 2, putting A=A/2 in the above formula, we get value of new capacitance half of the previous one.

Increasing the spacing would only result in a drop in capacitance because the capacitance was inversely related to the separation, or the length between the plates.

Increase the surface area of the parallel plate capacitor, shorten the distance between the plates, and utilize a dielectric material with a greater dielectric breakdown strength between the plates if you wish to improve capacitance.

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Answer:

positive acceleration.

Explanation:

As its slowing down gradually, its positive acceleration. When the ball slows down, its acceleration vector is in the opposite direction of its motion. Therefore positive acceleration.

The energy stored in a capacitor is determined as  ¹/₂Q²/C.

The energy stored in a capacitor is determined from the following formulas as shown below;

U = ¹/₂Q²/C

Where;

Thus, the energy stored in a capacitor is determined as  ¹/₂Q²/C.

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The pace at which electrons flow past a location in a complete electrical circuit is defined as current.

In a circuit, the maximum alternating voltage and current are 400 V and 20 A, respectively. The alternating values have a frequency of 50 hertz and are sinusoidal. Current is the rate at which a charge moves through a circuit point. The highest current might be drawn while the external resistance is zero. Electromotive force, abbreviated E or emf, is the amount of energy per unit electric charge delivered by an energy source such as a generator or a battery. As the gadget works on the electric charge being transported inside itself, energy is changed from one form to another in the generator or battery.

Electromotive force (also electroosmotic, abbreviated emf, indicated or) is an energy transfer to an electric circuit per unit of electric charge, measured in volts, in electromagnetism and electronics. Electrical transducers generate an emf by transforming various types of energy into electrical energy.

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Answer

Explanation

It would take 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

To calculate the time required to crumple the barrier and safely slow down the person, we can use the concept of impulse.

The impulse, denoted by J, is defined as the product of force and time, and it represents the change in momentum of an object. In this case, the impulse required to safely slow down the person can be calculated using the maximum force and the person's initial momentum.

The momentum of a person is given by the product of their mass and velocity:

Momentum = mass × velocity

Given that the person's mass is 68 kg and their velocity is 27 m/s, the initial momentum is:

Initial momentum = 68 kg × 27 m/s

To safely slow down the person, the impulse provided by the barrier should be equal to the change in momentum.

Therefore, we have:

Impulse provided by barrier = Final momentum - Initial momentum

Since the person is brought to rest, the final momentum is zero. Thus, we have:

Impulse provided by barrier = -Initial momentum

Now we can express the impulse in terms of force and time:

Impulse provided by barrier = Force × Time

Plugging in the known values, we can solve for time:

-Initial momentum = Force × Time

68 kg × 27 m/s = 1180 N × Time

Simplifying the equation, we find:

Time = (68 kg × 27 m/s) / 1180 N

Evaluating the expression:

Time = 1836 kg·m/s / 1180 N

Finally, converting kg·m/s to seconds, we get:

Time ≈ 1.5559 seconds

Therefore, it would take approximately 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

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The shortest chain sling, ACB, that can be used to lift the loaded bin without exceeding a tension of 5 kN

To determine the shortest chain sling configuration, we need to consider the forces acting on the loaded bin during lifting. The maximum tension in the chain sling should not exceed 5 kN.

Let's assume that A, B, and C are the lifting points on the loaded bin, and ACB represents the chain sling configuration.

To calculate the tension in the chain sling, we need to consider the angles at each point and the weight of the loaded bin.

Let W be the weight of the loaded bin (in kN) and θ1, θ2, and θ3 be the angles at points A, B, and C, respectively.

The tension in the chain sling, T, can be calculated using the following formula:

T = W / [(cos θ1)(cos θ2)(cos θ3)]

To find the shortest chain sling configuration, we need to determine the values of θ1, θ2, and θ3 that minimize the tension T while not exceeding 5 kN.

By applying appropriate rigging techniques and considering the geometry of the loaded bin and the available lifting points, the specific chain sling configuration, ACB, can be determined. This may involve using various combinations of chain lengths and angles to achieve the desired result.

The shortest chain sling configuration, ACB, that can be used to lift the loaded bin without exceeding a tension of 5 kN is determined based on the weight of the bin, angles at the lifting points, and the calculated tension in the chain sling. This configuration can be obtained by employing appropriate rigging techniques and considering the specific requirements of the lifting operation.

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Answer:

b is the equivalent

do u want explanation

The exact charge of the other piece is -3C.

Since the object had a charge of -6 C, the total charge of the two pieces must still be -6 C after breaking. If one piece has a charge of -3 C, then the other piece must have a charge of -6 C - (-3 C) = -6 + 3 = -3 C.

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Answer:

d

Explanation:

atoms exits everywhere

Answer: The correct choices to this question are, "B. Atoms are smaller than quarks," and "D. Atoms only exist on earth." Hope this helped.

Answer:

A physical can be changed back to its original state. A chemical can not.

Explanation:

Answer:

Physical and chemical changes are similar because matter experiences a change in state. Physical changes are different because matter remains the same substance, just in a different state, whereas chemical changes change the matter

Explanation:

copied from the internet

Answer:

4.0 kg

Hope it helps

Please mark me as the brainliest

Thank you

Answer:

An undercut is the burning away of the sidewalls of the welding groove during the welding process. Undercut appears at the edge or toe of the weld bead and runs parallel to the weld.

<3

Answer:

watts !

Explanation:

the answer is b. blah blah blah filling out space

According to special relativity, one can travel at increased rates. However, this is only possible when moving at very high speeds approaching the speed of light. When an object moves at high speeds, the time slows down, and the length of the object appears to be shortened.

These observations are known as time dilation and length contraction. Time dilation refers to the difference in the elapsed time measured by two observers, where one is stationary, and the other is moving at a constant velocity relative to each other. The faster the moving observer, the slower time appears to be for them. Length contraction, on the other hand, refers to the phenomenon where an object appears to be shorter in length when it's moving at high

This effect is more noticeable as the speed of the object approaches the speed of light. As a result, traveling at very high speeds can allow one to cover great distances in less time, which can be used for space exploration and other scientific research. However, it's worth noting that the effects of relativity are only noticeable at very high speeds, which are currently impossible to achieve with our current technology.

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Answer: C it was located at a higher altitude

Explanation:

none of the other ones make any sense so it definitely c

Answer: 267 m

Explanation:

2.99x10^8 m/s

———————-

1.12 x 10^6 Hz

A 24.0 kg dog running at 0.50 m/s has a momentum of 12 kg.m/s.

The momentum is the quantity of motion of a moving body, measured as a product of its mass and velocity.

A 24.0 kg dog is running with a momentum of 12 kg.m/s. We can find the speed of the dog using the following expression.

p = m × v

v = p / m

v = (12 kg.m/s) / 24.0 kg

v = 0.50 m/s

where,

A 24.0 kg dog running at 0.50 m/s has a momentum of 12 kg.m/s.

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Answer:

324 J

Explanation:

KE= 1/2 m*v^2

1/2*8*9^2

324 joules (=^w^=) woof woof

Answer:

3.gravitational energy is used based on force and kinetic base on gravity

Answer:

Below

Explanation:

CO2 buildup during exercise stimulates respiration

The resultant magnitude and direction of the takeoff velocity are 8.17 m/s and 21.6° above the horizontal, respectively.

The resultant magnitude and direction of the takeoff velocity can be found by using the Pythagorean theorem and trigonometry.

The Pythagorean theorem states that for a right triangle, the square of the hypotenuse (c) is equal to the sum of the squares of the other two sides (a and b):
c² = a² + b²

In this case, the horizontal velocity (7.6 m/s) and the vertical velocity (3 m/s) are the two sides of the right triangle, and the resultant velocity is the hypotenuse. Plugging in the values, we get:
c² = 7.6² + 3²
c² = 57.76 + 9
c² = 66.76
c = √66.76
c = 8.17 m/s

So the resultant magnitude of the takeoff velocity is 8.17 m/s.

To find the direction of the takeoff velocity, we can use trigonometry. The tangent of the angle (θ) between the horizontal and the resultant velocity is equal to the opposite side (vertical velocity) divided by the adjacent side (horizontal velocity):
tan θ = 3/7.6
θ = tan⁻¹(3/7.6)
θ = 21.6°

So the direction of the takeoff velocity is 21.6° above the horizontal.

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Answer:

(0.5x Time)²)

Explanation:

jump height = 4.9 x (0.5 x Time)2).

Potential difference, is same for all three resistors.

Hence, the correct option is B.

A. The current, on the other hand, is not the same for all three resistors, as it depends on the resistance of each resistor and the total resistance of the circuit.

B. The potential difference (delta V) across each resistor is the same in this circuit. This is because the circuit is a series circuit, meaning that there is only one path for the current to flow. Therefore, the same amount of charge flows through each resistor, resulting in the same potential difference across each resistor.

Hence, the correct option is B.

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Anxiety disorders are not completely curable.

An anxiety disorder is a disorder in which an individual easily develops feelings of anxiety even in situations which do not warrant such feeling.

The individual feels excessively anxious that it becomes a disability and does not allow the individual to live a  normal life.

There are five main types of anxiety disorders and they are as follows:

Anxiety disorders are not completely curable since they are purely psychological problems.

However, therapy and psychological assistance can lessen symptoms.

In conclusion, anxiety disorders affect productivity and makes an individual excessively anxious.

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Answer:

200

Explanation:

P = M x V

P = 8 x 25

P = 200

Thus Kinetic energy of the object is 200J when mass is 25 kg and velocity is 4 m/s.

if a charge of -3 x 10^-6 C were allowed to fall through a potential difference of +500 V, the change in potential energy for the charge would be -0.0015 J.

When a charge is allowed to fall through a potential difference, it gains or loses potential energy. In this case, the charge is negative, so it is being pulled toward the positive potential. The potential difference of +500 V means that the charge is falling from a higher potential to a lower potential.

The change in potential energy for the charge can be calculated using the equation ΔPE = qΔV, where ΔPE is the change in potential energy, q is the charge, and ΔV is the potential difference.

Plugging in the values given, we get ΔPE = (-3 x 10^-6 C) x (+500 V) = -0.0015 J. The negative sign indicates that the charge is losing potential energy as it falls through the potential difference.

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The weight of the top barrel does not contribute to the moment at point B.

Since the bottom barrel is hanging from the hand truck, its weight exerts a clockwise moment about the axle at point B. Let's call the weight of the bottom barrel W1 and the distance from point B to the center of mass of the barrel L1. The moment due to the weight of the barrel can be calculated as:

M1 = W1 × L1

where M1 is the moment due to the weight of the barrel.

Note that the weight of the top barrel does not contribute to the moment at point B, since it is supported by the bottom barrel and the hand truck.

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Refrigerant oil boiling pressure The boiling pressure of refrigerant oil is determined by the temperature of the system. This temperature varies depending on the pressure exerted on the oil. The refrigerant oil will boil at a different temperature for each refrigerant.

The boiling point of refrigerant oil can be estimated by determining the boiling pressure at a certain temperature of the system. The approximate boiling pressure of refrigerant oil in a system ranges from 20 to 30 psig. However, this value may vary depending on the type of refrigerant used in the system. The refrigerant oil can also be changed depending on the type of refrigerant used in the system.The type of refrigerant used in the system will also affect the boiling pressure of refrigerant oil. A refrigerant is a substance that changes from a liquid state to a gaseous state at a specific temperature. It is used in refrigeration systems to transfer heat from one location to another. The refrigerant oil is added to the system to ensure that all parts of the system are lubricated. This prevents the parts from grinding together and causing damage.

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Temperature measures the vigor of atomic motion and collisions in a material.

Temperature is a fundamental property that measures the average kinetic energy of particles in a material. It reflects how vigorously atoms or molecules are moving and colliding with each other.

When the temperature of a substance increases, its particles gain more energy, resulting in increased motion and collision frequency. This heightened activity affects the material's physical properties, such as expansion and changes in phase.

Temperature also influences chemical reactions, as higher temperatures generally lead to faster reaction rates due to increased energy available for overcoming activation barriers. Additionally, temperature gradients drive heat transfer, enabling the flow of thermal energy from hotter regions to cooler ones.

Understanding temperature is crucial for comprehending the behavior of materials, their phase transitions, reaction kinetics, and heat transfer processes. By studying temperature, scientists gain insights into the fundamental nature of matter and its interactions.

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