Help pls it’s urgent

Answer:

10

Explanation:

10 is answer because velocity is time /position. So time is 50 and position is 5

The electric potential energy stored in the capacitor is 4.70 x 10^-8 Joules.

The electric potential energy stored in a capacitor is given by the formula:

U = (1/2) * C * V^2

where U is the potential energy in Joules, C is the capacitance in Farads, and V is the voltage across the capacitor in Volts.

In this case, we are given that the capacitor stores 9.40 x 10^-10 C of charge at 50.0 V. However, we are not given the capacitance value. Therefore, we cannot calculate the potential energy directly using the above formula.

To find the capacitance value, we can use the formula:

C = Q / V

where Q is the charge stored in the capacitor and V is the voltage across the capacitor.

Substituting the given values, we get:

C = 9.40 x 10^-10 / 50.0

= 1.88 x 10^-11 F

Now we can use the formula for electric potential energy to find the energy stored in the capacitor:

U = (1/2) * 1.88 x 10^-11 * (50.0)^2

= 4.70 x 10^-8 J

Therefore, the electric potential energy stored in the capacitor is 4.70 x 10^-8 Joules.

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After multiple contacts with the charged ball, the charge on the rod will be arranged so that the net charge of the rod is zero.

This is because the ball is a conductor, so when it contacts the rod, the charge will spread out evenly over the rod. The rod will then have an equal amount of positive and negative charge.

Electrical charge is the physical property that causes objects to experience a force when they are in an electric field. It is the charge on an object that causes it to be attracted to or repelled from other objects. Positively charged objects will be attracted to negatively charged objects and vice versa. Electrical charge is measured in coulombs, which is the amount of charge that flows through a conductor when a current of one ampere flows for one second.

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Answer:

Magnetism is a physical phenomenon that manifests itself in a force acting between magnets or other magnetized or magnetisable objects, and a force acting on moving electric charges, such as in current-carrying cables. The force action takes place by means of a magnetic field, which is generated by the objects themselves or otherwise. There are natural and artificial magnets. All magnets have two poles called the north pole and the south pole. The north pole of one magnet repels the north pole of another magnet and attracts the south pole of another magnet; the same with south poles.  

bonjours

non il y a des métaux  type alu, argent, plomb qui ne reagissent pas au aimants

j espère que cela vous aura aidée

bonne fin de journée a vous

Answer:

the maximum allowable current is 7302.967  amperl

Explanation:

The computation of the maximum allowable current is shown below;

Force F = mean ÷ 4π 2 I_1 I_2 ÷d  × ΔL

200 N = (10)^-7 (2I × I) ÷ 0.08 × 1.5

200 = 3.75 × 10^-6 I^2

I = √200 ÷ √ 3.75 × 10^-6

= 7302.967  amperl

Hence, the maximum allowable current is 7302.967  amperl

Basically we applied the above formula

Nuclear power plants have backup generators to ensure that essential equipment, such as cooling systems, can continue to function in the event of a power outage or other emergency.

Nuclear power plants rely on a constant supply of electricity to operate the equipment that controls the nuclear reaction and cools the reactor. If the power supply is interrupted, the reactor can overheat and damage can occur. Backup generators provide power to essential equipment, such as cooling systems, that keep the reactor and spent fuel pools from overheating.  If the backup generators fail, there is a risk of a nuclear accident, as was seen in the disaster in 2011, where the failure of backup generators led to a loss of cooling and a major nuclear incident.

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The speed of the box 2.8 s after you started pushing on it is 9.1 m/s.

The gravitational force is a force of attraction that attracts all the physical forms having mass.

Given, gravitational force on the box is 29.4 N.

At the instant you start pushing the box, normal force is equal in magnitude to the gravitational force, which is 29.4 N. Given, frictional force 13.0 N, so : Fnet = 23.0 sin 45 - 13.0 - 29.4 = -9.7 N

d = (1/2)at² = (1/2)(-9.7/3.0)(2.8)^2 = -27.1 m.

Negative sign indicates that the box has moved in opposite direction to the force you applied.

As, v² = u² + 2as,

v = sqrt(2as) = sqrt(2(9.7/3.0)(27.1)) = 9.1 m/s.

Therefore, the speed of the box 2.8 s after you started pushing on it is 9.1 m/s.

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In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.

This relationship is described by the equation for the generated emf in a DC generator:

Emf = Φ * N * A * Z / 60

Where:

Emf is the generated electromotive force (in volts),

Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),

N is the number of turns in the armature winding,

A is the effective area of the armature coil (in square meters),

Z is the total number of armature conductors, and

60 is a constant representing the conversion from seconds to minutes.

From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.

The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.

The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.

Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.

By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.

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Explanation:

F = kx

mg = kx

(20 kg) (10 m/s²) = (1800 N/m) x

x = 0.11 m

Momentum is conserved, so the sum of the separate momenta of the car and wagon is equal to the momentum of the combined system:

(1250 kg) ((36.2 i + 12.7 j ) m/s) + (448 kg) ((13.8 i + 10.2 j ) m/s) = ((1250 + 448) kg) v

where v is the velocity of the system. Solve for v :

v = ((1250 kg) ((36.2 i + 12.7 j ) m/s) + (448 kg) ((13.8 i + 10.2 j ) m/s)) / (1698 kg)

v ≈ (30.3 i + 12.0 j ) m/s

Answer:

An object is called a horizontal projectile if it is launched from a certain height with some initial horizontal velocity only. The initial vertical velocity of such an object is zero. But as the object falls through the atmosphere the horizontal component of velocity remains constant but vertical component increases due to gravitational acceleration.

Explanation:

Answer:

\(59000\)

\(1.8\times 10^5\)

\(4.3\times 10^{-2}\)

\(9.0\times 10^{-6}\)

\(8.4\times 10^{-6}\)

Explanation:

The given numbers are

\(1.8\times 10^5=18000\)

\(4.3\times 10^{-2}=0.043\)

\(8.4\times 10^{-6}=0.0000084 \)

\(9.0\times 10^{-6}=0.000009\)

\(59000\)

The arrangement of the numbers from largest to smallest is

\(59000\)

\(1.8\times 10^5\)

\(4.3\times 10^{-2}\)

\(9.0\times 10^{-6}\)

\(8.4\times 10^{-6}\).

We have that the absolute pressure at the bottom of the tank is mathematically given as

Pabs=209.21Kpa

Question Parameters:

A 3-m-diameter vertical cylindrical tank is filled

with water to a depth of 11 m.

Generally the equation for the Absolute Pressure  is mathematically given as

Pabs=Patm+pgh

Therefore

Pabs=101.3e3+(1000*9.81*11)

Pabs=209.21Kpa

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These are some frictional disadvantages: Overheating caused by friction consumes energy. Money is spent on both reducing resistance and

What does friction mean?

A force called friction keeps two objects from slamming into or rolling over one another. While friction force, such the traction needed to walk without slipping, may be helpful, they can also present a sizable degree of impediment to motion.

Why does Friction arise?

Friction is caused by flaws on the surfaces that are in touch. Even for the finest materials include minute imperfections, and these flaws produce friction when two surfaces come into contact. As the defects get worse, the friction gets worse.

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Answer: 1.098 meters

Explanation: I don't know, I found the answer on the internet

Answer:

1. 90N

2. 200N

3. 400N

4.20w

5.7200N

Explanation:

1.F=ma

30 * 3 = 90

2.W=FD

50 * 4=200

4. P=W/t

300/15=20

5.W= Pt. 2minutes = 120sec

60*120 = 7200

Answer:

a) 0.47MW

b) 39.24%

Explanation:

In order to find the power needed for the elevator to operate at its maximum capacity, we can make use of the following formula:

P=Fv

where P is the power, F is the force and v is the velocity.

The force the elevator must carry can be calculated with the following formula:

F=mg

where m is the mass of the elevator and g is the acceleration of gravity, so:

\(F=(8000 kg)(9.81 m/s^{2})\)

F=78 480 N

so now we can make use of the power formula:

P=Fv

P=(78 480N)(6 m/s)

P=470 880W

P=0.47W

b)

In order to find the efficiency, we will suppose that the generator can generate a maximum of 0.47 W so we use the following formula:

\(efficiency = \frac{P_{in}}{P_{out}}*100\%\)

\(efficiency=\frac{0.470880}{1.2}*100\%\)

efficiency=39.24%

12. The time taken for the journey is 400 s

13. The time taken for the train is 200 s

14. The time taken is 7 h

15. The time taken for the beetle is 12 s

16. The time taken for the journey is 0.0068 h

The time taken in each case as given by the question can be obtain as follow:

12. The time taken for the journey

Time taken = Distance / Speed

Time taken = 26000 / 65

Time taken = 400 s

13. The time taken for the train

Time taken = Distance / Speed

Time taken = 3200 / 16

Time taken = 200 s

14. The time taken to travel

Time taken = Distance / Speed

Time taken = 672 / 96

Time taken = 7 h

15. The time taken for the beetle

Time taken = Distance / Speed

Time taken = 1.08 / 0.09

Time taken = 12 s

16. The time taken for the journey

Time taken = Distance / Speed

Time taken = 35 / 5147

Time taken = 0.0068 h

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So, if strength is your goal: Warm up, do your strength workout, then finish with longer cardio bouts if you want to bake cardio into the equation. However, if you're training for a race or looking to build cardio endurance, start with cardio-just be careful when you get to the weights.

Explanation:

i think a cardio workout

The series circuit has components connected in a sequence, while the parallel circuit has components connected in different branches. If bulb B2 is replaced with a wire in the series circuit, bulb B1 will not light up, while in a parallel circuit, it will still light up.

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I'm trying to make an electromagnet that's strength is constantly getting incremented by small amounts every second. I need to know, which would have a greater effect on the electromagnet's strength, amps or volts? (I know increasing the turns and/or density of the magnet wire will increase the strength, but I am looking for answers other than that particular one.)

Answer:  momentum is determined and conserved.

Answer:

monument is determined

Answer:

B. -20 m/s

Explanation:

Given the following data:

Initial velocity = 30 m/s

Acceleration = 5 m/s²

Deceleration = -5 m/s² (deceleration is the negative of acceleration)

Time = 10 seconds

To find the final velocity, we would use the first equation of motion;

\( V = U + at\)

Where;

V is the final velocity.

U is the initial velocity.

a is the acceleration.

t is the time measured in seconds.

Substituting into the formula, we have;

\( V = 30 + (-5)*10\)

\( V = 30 - 50\)

Final velocity, V = -20 m/s

The spring stiffness is quantified by the spring constant, or k. For various springs and materials, it varies.

The stiffer the spring is and the harder it is to stretch, the larger the spring constant.

Springs are pliable mechanical devices that regain their previous shape after deforming, i.e. after being stretched or compressed. They are an essential part of many different mechanical devices.

The well-known metal coil has evolved into an essential element in the modern world, appearing in everything from engines to appliances to tools to automobiles to medical equipment and even basic ball-point pens. The spring's ability to store mechanical energy accounts for its widespread use and applications.

Therefore, The spring stiffness is quantified by the spring constant, or k. For various springs and materials, it varies.

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the angle between vectors is 1

let,  vector A,B and |A| =5 , |B| =12

According to dot product,

A.B = |A| |B| cos∝

-6 = 5x12cos∝

cos∝ = 0.99

nearly equal to 1

hence the angle between A and B is 1

Answer:

By using work energy theorem

Intake energy = work out

Intake energy = (number of lifting barbell) x (work done per lifting)

Ei = n x W

Ei = nW

Now

Work per lifting = Force x displacement

W = (mg) x (displacement)

W = (50 x 9.8) x (2)

W = 980 J

Now

Ei = n x W (Ei = 2000 Cal = 2 kilocalory = 8368 Joule)

8368 = n x 980

n = 8.53

Aprrox 8 times he should raise barbell to expend 2000 calory.

Explanation:

The temperature of a substance is determined by the average kinetic energy of its particles, so Substance X and Substance Y have higher temperatures because their particles have more kinetic energy. The number of particles does not affect temperature. The correct options are (A) and (C).

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To find the acceleration of the 450 kg mass acted upon by three forces with a coefficient of friction of 0.22, we need to first find the net force acting on the mass.

Let F1, F2, and F3 be the three forces acting on the mass. The net force is given by:

F_net = F1 + F2 + F3 - frictional force

where the frictional force is given by:

frictional force = coefficient of friction * normal force

The normal force is equal to the weight of the object, which is given by:

weight = mass * acceleration due to gravity

Substituting these values, we get:

frictional force = 0.22 * 450 kg * 9.81 m/s^2

frictional force ≈ 978.54 N

Therefore, the net force acting on the mass is:

F_net = F1 + F2 + F3 - 978.54 N

Since the mass is accelerating, the net force is equal to the mass times the acceleration, i.e.,

F_net = mass * acceleration

Therefore,

mass * acceleration = F1 + F2 + F3 - 978.54 N

Solving for the acceleration, we get:

acceleration = (F1 + F2 + F3 - 978.54 N) / mass

Without more information about the magnitudes and directions of the three forces, we cannot calculate the acceleration.