can someone explain it please?​

At the instance a current of 0.15 a is flowing through a coil of wire, the energy stored in its magnetic field is 8.5 mj. The self-inductance of the coil is approximately 0.757 henry.

To find the self-inductance of the coil, we can use the formula for the energy stored in a magnetic field:
Energy = (1/2) * L * I²
Where Energy is the magnetic energy stored in the coil (8.5 mJ), L is the self-inductance we are trying to find, and I is the current (0.15 A).
First, convert 8.5 mJ to J (joules) by multiplying by 10^-3:
Energy = 8.5 * 10^-3 J
Now, plug in the given values and solve for L:
8.5 * 10^-3 = (1/2) * L * (0.15)^2
To find L, first multiply both sides by 2:
2 * 8.5 * 10^-3 = L * (0.15)^2
Now, divide by (0.15)^2:
(2 * 8.5 * 10^-3) / (0.15)^2 = L
L ≈ 0.757 H

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The tension in the wires is greater when they are not vertical (option B).

When the wires are vertical, they are only supporting the weight of the painting, which is acting straight down due to gravity.

However, when the wires are at an angle, they are not only supporting the weight of the painting but also providing a force to counteract the component of the weight that is acting perpendicular to the direction of the wires.

This means that the wires are under more tension when they are at an angle than when they are vertical.

In other words, the tension in the wires is directly proportional to the angle between the wires and the vertical direction.

The greater the angle, the greater the tension in the wires. This is why it is important to use an appropriate angle when hanging heavy objects with wires, to ensure that the wires are under enough tension to support the weight without breaking.

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The statement 'all energy in the universe is a result of mass being converted into energy' correctly describes mass-energy equivalence.

The expression mass-energy equivalence refers to the proportion of matter that can be converted into energy in the universe.

This mass-energy equivalence is an outcome of process of converting mass into energy.

In conclusion, the statement 'all energy in the universe is a result of mass being converted into energy' correctly describes mass-energy equivalence.

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Answer:

C

Explanation:

Answer:

from food eaten (i.e contain carnlbohyadrates)

Answer:

D- fuerza nuclear fuerte

Explanation:

Answer:

Explanation:

Magnetic field due to current carrying wire at a distance r from the  wire is

\(B=\frac{\mu_0I}{2r}---(1)\)

In our case

\(I=\frac{I_0}{2}\)

where,

I₀ = max current or peak current

and r = h (where h is the height of power line)

\(\therefore B=\frac{\mu (I_0/2)}{2h} \\\\=\frac{\mu_0 I_0}{4h} ----(2)\)

put

h ≈ 370m

I₀ ≈ 3KA

\(B= \frac{(1.26*10^-^6)(3*10^3)}{4*(370)} \\\\=2.5*10^-^6 T\)

Answer:

Escape velocity is defined as the velocity which will take a body to go the infinite distance away above the surface of the earth when projected upwards.

Hope this helps...

Good luck on your assignment....

Answer:

atom

Explanation:

the first guy who gave link this is for you:

we cannot use links in brainly

Thankyou.

On calculation, the Average speed of the swimmer = 1 m/s and the average velocity = 0 m/s for the swimmer

Average speed = total distance / total time= (50+50)/100 = 1m/s

Average velocity = total displacement / total time = 0/100 = 0 m/s

The overall distance that an object covers in a given amount of time is its average speed. A scalar value represents the average speed. This average speed has no direction and is indicated by its magnitude.

The formula for an object’s general speed average is [Average Speed = Total Distance Traveled Total Time Taken]. M/s is considered as the SI unit for average speed.

Average speed is determined by dividing the total distance you travelled by the total time, whereas average velocity is determined by dividing your displacement (a vector pointing from your initial position to your end position) by the whole time.

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Answer:

"correlated positively*  one doesn't know any move than that

Answer:

my dad is a physics professor so when he comes home i will tell him to answer the question for you

Answer:

solar eclipse mostly occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Answer:A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation:

Hope it helps

The sprinter runs a distance of 122.08 meters during the acceleration phase. Sprinter's acceleration from rest to a top speed with an acceleration whose magnitude = a = 3.69 m/s², Total race length = 50 meters, Time taken = t = 8.12 s.

Now, we are going to calculate the distance covered during the acceleration phase.

The formula to calculate distance covered in acceleration is:

S = ut + 1/2 at².

Here,u = Initial velocity = 0m/s (As he was at rest initially).

Let's put the given values in the above formula,S = 0 + 1/2 × 3.69 × (8.12)²= 122.08 meters.

Therefore, the sprinter runs a distance of 122.08 meters during the acceleration phase.

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The potential energy when a force of 540 n keeps a certain ideal spring stretched a distance of 0.500 m is compressed 7.00 cm is 2.646 J.

To calculate the potential energy of the ideal spring when it is compressed 7.00 cm, we need to first determine the spring constant (k) using Hooke's Law. Hooke's Law states that the force (F) exerted by a spring is proportional to the displacement (x) from its equilibrium position:

F = -kx

Given the force of 540 N and the stretched distance of 0.500 m, we can solve for k:

540 N = k(0.500 m)

k = 1080 N/m

Next, we need to convert the compressed distance from 7.00 cm to meters:

7.00 cm = 0.070 m

Now, we can calculate the potential energy (PE) of the spring when compressed 0.070 m using the following formula:

PE = (1/2)kx²

PE = (1/2)(1080 N/m)(0.070 m)²

PE = 2.646 J

Therefore, the potential energy of the ideal spring when it is compressed 7.00 cm is 2.646 J.

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The quality at the final state is 2.96%.

Given,

m = 1 Kg p₂ = 30 bar

Water is cooled at a constant specific volume from p₁ to p₂

At first, water is at a critical point. The final quality will be determined if the water is cooled at a constant specific volume. The precise volume must be determined if the water expands at a constant temperature.

The critical pressure and critical temperature of the water are

\(p_c = 220.9 bar\\T_c = 647.13 K\)

The specific volumes of the saturated liquid and saturated vapor corresponding to the saturation pressure of 30 bar are:

\(v_f = 1.2165 \times 13^{-3}\frac{m^3}{kg} \\v_g = 0.06668 \frac{m^3}{kg}\)

Then the quality of state is:

\(v = v_f + x(v_g-v_f)\\\implies x = \frac{v - v_f}{v_g - v_f} \\\implies x = \frac{0.0031555-1.2165\times10^{-3}}{0.06668-1.2165\times10^{-3}}\)

⇒ x = 0.0296

⇒ x = 2.96%

Therefore, the quality at the final state is 2.96%.

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Answer:

1) Yes, the work done by gravity during the trip upward is -41.405·m J

2) Yes, the work done by gravity on the ball during the trip downward = 41.405·m J

Explanation:

The given parameters are;

The initial velocity of the ball on the way up = 9.1 m/s

The final velocity of the ball on the way up = 0 m/s

The initial velocity of the ball on its trip downward = 0 m/s

The final velocity of the ball on its trip downward = 9.1 m/s

1) The work done by gravity on the trip upward = The change in kinetic energy of the ball

The change in kinetic energy of the ball = 1/2 × m × 9.1² = -41.405·m J, given that the initial kinetic energy is 41.405·m J and the final kinetic energy is  J

Where;

m = The mass of the ball

Therefore, the work done by gravity during the trip upward = -41.405·m J

2) Similarly gravity does work on the ball during the trip downward = 41.405·m J.

Answer:

the girl is running faster because -2 is greater than -8

Explanation:

The rocket attains a speed of 60 m/s in a matter of 6.3 s, so it is undergoing an acceleration a of

a = (60 m/s - 0) / (6.3 s) ≈ 9.52 m/s²

During launch, the only forces acting on the rocket are directed vertically:

• its weight (pointing down) with magnitude W,

• drag (pointing down) with magnitude 50 N, and

• thrust (pointing up) with magnitude T.

(a) By Newton's second law, the magnitude of the net force is proportional to the acceleration according to

∑ F = m a

where m is the mass of the rocket, so the magnitude of the net force is

(8 kg) (9.52 m/s²) ≈ 76.2 N

and it is directed upward.

(b) Expanding the equation from part (a) gives

T - W - 50 N = (8 kg) (9.52 m/s²)

The weight is

W = (8 kg) g = (8 kg) (9.80 m/s²) = 78.4 N

so the thrust force is

T ≈ 76.2 N + 78.4 N + 50 N ≈ 205 N

(c) We found this earlier, a ≈ 9.52 m/s².

(d) The rocket's height y at time t is given by

y = 1/2 a t ²

so that after 6.3 s, it will have reached a height of

y = 1/2 (9.52 m/s²) (6.3 s)² = 189 m

Answer:

hey mate your answer is here

A mass of 48 g is attached to a certain spring, it makes 16 complete vibrations in 2.1 s. The spring constant of the spring is approximately 29.19 N/m.

To find the spring constant (k) of the spring, we can use Hooke's Law, which states that the force exerted by a spring is directly proportional to the displacement from its equilibrium position.

Hooke's Law can be expressed as:

F = -kx

Where:

F is the force exerted by the spring,

k is the spring constant,

x is the displacement from the equilibrium position.

In the case of simple harmonic motion, the period (T) of oscillation is related to the spring constant and the mass (m) attached to the spring:

T = 2π * \(\sqrt{m/k}\)

Given:

Mass (m) = 48 g = 0.048 kg

Number of complete vibrations (n) = 16

Time (t) = 2.1 s

First, let's calculate the period of oscillation (T) using the formula:

T = t / n

T = 2.1 s / 16 ≈ 0.13125 s

Now, we can rearrange the equation for the period to solve for the spring constant (k):

k = (4π² * m) / T²

k = (4 * π² * 0.048 kg) / (0.13125 s)²

k ≈ 29.19 N/m

Therefore, the spring constant of the spring is approximately 29.19 N/m.

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it's C

because the faster an object moves the more kinetic energy it has.

i don't know.

Explanation:

because i don't want responde

It would take approximately 716,943 years for the New Horizons space satellite to travel to Proxima Centauri at its current speed.

To calculate the number of years it would take for the New Horizons space satellite to travel to Proxima Centauri, we need to convert the speed of the satellite to the appropriate units and then use the formula for time:

Distance = Speed × Time

Given:

Distance to Proxima Centauri = 4.3 light years

Speed of New Horizons = 53,000 kilometers per hour

First, we need to convert the speed of New Horizons from kilometers per hour to light years per year. To do this, we'll use the conversion factor:

1 light year ≈ 9.461 × \(10^{12\) kilometers

Speed of New Horizons in light years per year:

Speed in light years per year = (53,000 kilometers per hour) × (1 year / 8766 hours) × (1 light year / 9.461 × \(10^{12\) kilometers)

Speed in light years per year ≈ 0.000006003

Now, we can calculate the time it takes to travel to Proxima Centauri:

Time = Distance / Speed

Time = 4.3 light years / 0.000006003 light years per year

Time ≈ 716,943 years

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The factors that  can cause an induced current in a wire loop are number of turns of the wire, area of the wire and magnetic field strength.

According to Faraday's law of electromagnetic induction, the rate of change of flux in a magnetic field is proportional to the flux through the magnetic field.

emf = dФ/dt

where;

emf = N(BA)/dt

where;

Thus, the factors that  can cause an induced current in a wire loop are number of turns of the wire, area of the wire and magnetic field strength.

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We have that the velocity of the ball when it hits the glass.Using the appropriate significant figures is

V=4.43ft/s

From the question we are told that

Generally the equation for the Velocity  is mathematically given as

\(V^2=2as\\\\Therefore\\\\V=\sqrt{2*9.8*1}\\\\V=4.43ft/s\)

Therefore

the velocity of the ball when it hits the glass.Using the appropriate significant figures is

V=4.43ft/s

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Answer:

:parallel

Explanation:

Potential difference is the difference in potential energy per charge between two different points in an electric circuit. Here is a simpler explanation:

The kWh used per week by the electric range whose voltage and current is 240 V and 11 A respectively is 18.48 kWh.

A kilowatt-hour is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ).

To calculate the kWh per week of the electric range, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the kWh used per week is 18.48 kWh.

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Answer:

Your answer is 5 m/s

Explanation:

The hydrometer reading for a fully charged battery provides an indication of the battery's electrolyte density, which is measured as specific gravity.

Specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water. In the context of batteries, the specific gravity of the electrolyte can be measured using a hydrometer.

A fully charged battery typically has a specific gravity reading in the range of 1.265 to 1.280, or 12.6 to 12.8 on the hydrometer scale. This range may vary slightly depending on the type and manufacturer of the battery. The specific gravity reading is directly related to the concentration of sulfuric acid in the battery electrolyte.

During the charging process, chemical reactions occur within the battery, converting lead plates and lead dioxide plates into lead sulfate. This reaction increases the concentration of sulfuric acid in the electrolyte, resulting in a higher specific gravity reading.

When a battery is fully charged, the specific gravity reading reaches its maximum value because the concentration of sulfuric acid is at its highest. This indicates that the battery has stored the maximum amount of energy possible and is in optimal condition.

However, it's worth noting that newer maintenance-free batteries or sealed batteries may not have easily accessible electrolyte for measurement with a hydrometer. In such cases, other indicators such as voltage readings or battery health indicators provided by the manufacturer may be used to determine the battery's charge level.

It's essential to consult the battery manufacturer's guidelines or specific battery documentation to obtain accurate hydrometer readings for a fully charged state. This ensures proper maintenance and monitoring of the battery's health and performance.

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