which statement regarding a short circuit is true? group of answer choices a short circuit is an accidental low-resistance connection in a circuit, typically when the power is connected directly to ground. a short circuit happens when a circuit is broken or interrupted a short circuit happens when the resistance in a circuit is too low a short circuit is dangerous because it creates a build-up of static charge

The current flowing through the loop is approximately 1.96 amperes.

Ampere's law states that the magnetic field around a closed loop is directly proportional to the current passing through the loop and inversely proportional to the distance from the center of the loop. By rearranging the formula, we can solve for the current:

B = (μ₀ * I) / (2 * π * r),

where B is the magnetic field, I is the current, μ₀ is the permeability of free space (a constant), and r is the radius of the loop.

In this case, we are given the magnetic field B = 2.5 mT and the diameter of the loop, which is equal to twice the radius (1.0 cm). We can convert the magnetic field to tesla by dividing by 1000 (1 T = 1000 mT). Thus, B becomes 0.0025 T, and the radius r is 0.5 cm.

Substituting these values into the rearranged Ampere's law equation, we have:

\(0.0025 T = (4\pi * 10^{-7} T m/A * I) / (2 * \pi * 0.5 cm).\)

Simplifying the equation, we cancel out the common factors and convert cm to meters:

\(0.0025 = (4\pi * 10^{-7}I) / 0.01.\).

Further simplification yields:

\(I = (0.0025 * 0.01) / (4\pi * 10^{-7}).\)

Evaluating the right side of the equation, we find:

I ≈ 1.96 A.

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The current in power lines and the current in wires in the home are both measured in amperes (amps), but they differ in terms of their magnitudes.

Power lines carry high voltage and high current electricity, typically in the range of thousands of volts and amperes. This high voltage and current are required to transmit electricity over long distances efficiently. In contrast, the current in wires in the home is much lower, typically in the range of 10-20 amps, and the voltage is lower as well, typically around 120 volts. This lower voltage and current are sufficient to power most household appliances and electronics. It is important to note that the amount of current that flows through a wire depends on the resistance of the wire. Power lines have a much lower resistance compared to the wires in a home, which means that more current can flow through them without causing overheating or damage. In homes, wires are designed to handle a certain amount of current safely, and exceeding this limit can result in electrical fires and other hazards. In summary, power lines carry high voltage and high current electricity to transmit power over long distances, while wires in the home carry lower voltage and current to power household appliances and electronics.

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Explanation:

Pressure = Height * Density * acc. due to gravity

P = 2 * 680 * 9.8 = 13, 328 Pa

Answer:

13328pa

Explanation:

p = hgd

h = height = 200cm = 2m

g = 9.8m/s²

d = density = 680kg/m³

p = pressure

p = 2 x 9.8 x 680 = 13328pa

Answer:

progession

Explanation:

Astrophysics is a branch of science inside physics aimed at understanding the universe and human civilization from its place within it.

Astrophysics can be defined as a branch of science that studies celestial bodies in the universe and all referred to physics and chemistry in space, which is fundamental to understanding the role played by human civilization in the universe.

Therefore, with this data, we can see that Astrophysics is a branch of science aimed at deciphering the place of human civilization in the universe and space.

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The air space would be half the size it was at the surface.

It should be noted that airspace means the portion of the atmosphere controlled by a country that's above its territory.

Based on the information given, the The air space would be half the size it was at the surface.

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Answer:

Explanation:

Answer:

Earth receives the perfect amount of heat and light that allow life to flourish

Answer:

When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases. The opposite is also true—as frequency decreases, wavelength increases.

Explanation:

0.75

According to the formula, P=IV

150 = I×200

Unlike the IQ, your emotional intelligence (EQ) may be improved over time by becoming more mindful

Emotional intelligence is the understanding and usage of one's own emotions in a positive way to relieve their stress. It also helps for effective communication, to overcome challenges, to empathize and to defuse any bad situation.

Option A is the correct for IQ ( Intelligence quotient ). Option C is wrong because EQ can be built in any stage of your life. EQ is basically emotions. So option D is incorrect.

Therefore, Unlike the IQ, your emotional intelligence (EQ) may be improved over time by becoming more mindful

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The answer is  24.84kJ.

We apply the expression for the work done by the heat engine is,

\(W=E_{i n}-E_{o u t}\). Putting all given values in the equation we get the final answer.

What is heat engine?

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Answer:

Elijah Mikaelson

like, who else?????

Explanation:

a) Distance ➤ (80+50+70+40) m. ➤ Distance= 240m.

b) Displacement ➤ (50+40)m. ➤ Displacement= 90m

c) Average Speed ➤ Total distance travelled/total time taken

                              ➤ 240/48

                              ➤ 5 \(ms^{-1}\)

d) Average Velocity ➤ Total displacement/total time taken

                                 ➤ 90/48

                                 ➤ 1.875 \(ms^{-1}\)

Explanation:

Molecular motion is defined as the movement of constituent particles or molecules in a certain direction. The molecular motions are affected by heat and temperature. This is because the temperature is the measurement of the average kinetic energy of the molecules and represents the motion of molecules.

Answer:

Nuisance static charges are more likely to occur when the air is dry.

When the air is dry, it is not able to hold a sufficient amount of moisture or humidity. When the moisture content of the air is low, the air has a low electrical conductivity, which increases the likelihood of static charges.Static electricity can be created by the rubbing of two objects. When these objects are separated after rubbing, they are left with a static electric charge. The strength of the electric charge is determined by the materials used to create the two objects. Some materials are better at holding static charges than others.

Dry air only exacerbates the situation. Static charges can be a nuisance for a variety of reasons. They can cause shocks, interfere with electronic devices, and can even cause damage to sensitive equipment. In order to reduce the occurrence of static charges, it is important to ensure that the air in your environment is sufficiently humid. This can be achieved by using a humidifier or by simply placing bowls of water around the room. Additionally, anti-static products, such as sprays and mats, can be used to reduce the occurrence of static charges.

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Answer:

Acceleration, a = 0.375 m/s²

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

Given the following data;

Initial velocity, u = 0m/s

Final velocity, v = 0.3m/s

Time, t = 0.8secs

Substituting into the equation, we have;

\(a = \frac{0.3 - 0}{0.8}\)

\(a = \frac{0.3}{0.8}\)

Acceleration, a = 0.375 m/s²

Therefore, the the magnitude of the vacuum's acceleration is 0.375 m/s²

Explanation:

F = ma

213 N = 21.4 kg * a

a = 213 / 21.4 = 9.95 m/s^2

The cylinders would have the most kinetic energy of motion when they are at the bottom of their trajectory, just before they hit the ground.

Trajectory is the path of an object or particle as it moves through space. It is determined by the object's initial velocity and the force acting on it, such as gravity. Trajectory can be used to describe the movement of a rocket, a ball, a wave, or any other object in motion. Trajectories are used to calculate the path of an object and the time it will take to reach its destination. In physics, trajectories are studied using the equations of motion and Newton's laws of motion. In engineering, they are used in the design of missiles, aircraft, and vehicles. Trajectories are also used in the design and construction of maps. In ballistics, trajectories are used to model and predict the behavior of a projectile, such as a bullet or missile, when fired. Trajectories can be calculated in two dimensions, three dimensions, or more, depending on the application.

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Number of oxygen molecules in each breath is 2.9X10^21

Given that the volume of air inside a breath (V) = 6.0×10^−4 m^3

oxygen in fresh air = 20%

volume of oxygen in fresh air = 20/100 x 6.0×10^−4 = 1.2x10-4m^3

pressure in the lungs (P)=  1.0×10^5 pa

Temperature of air (T) =300K

Using ideal gas equation find the number of moles of oxygen

PV = nRT

Then n = 1.0×10^5 x  1.2x10-4 / 8.314 x 300 = 4.8x10-3mol

We know the number of molecules in 1 mol is 6.023x10^23

Then the number of molecules in 4.8x10-3mol of oxygen is =

4.8x10-3molx 6.023x10^23 = 2.9x10^21

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Answer:

anything stationary

Explanation:

anything that is not moving outside the train like passing trees or the train's station is considered to be a frame reference.

A. Decrease the mass of one of the objects.

B. Increase the distance between the objects.

this two changes would decrease the gravitational force between two

objects. Hence option A and B is correct.

Gravitational force is force of attraction between two masses. Gravitational force(F) between two bodies is directly proportion to the product of masses(m₁,m₂) of two object and inversely proportional to square of distance(r) between them. mathematically it is written as,

F ∝ m₁.m₂

F ∝ 1/r²

F = G m₁,m₂÷r²

where G is gravitational constant, whose value is 6.6743 × 10⁻¹¹ m³ kg-1s⁻².

Force is expressed in Newton N in SI unit. its dimensions are [M¹L¹T⁻²].

This is analogous with coulomb's law which gives force between two charges.

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Answer:

The car applies a force in the opposite direction it is moving to. That is; from east to west.

Explanation:

This obeys Newtons third law of motion.

Answer: 1.44m/s West

Explanation:

Given the following :

Mass of skater = 60kg

Average force = 240N east

Time of = 0.360 seconds

The Velocity after 0.360seconds

Recall the relation:.

Force(f) * time(t) = mass (m) * (final Velocity(V) - initial velocity(u))

Where ; final Velocity(v) - initial velocity(u) = Magnitude of velocity(V)

Ft = mV

240 × 0.360 = 60 × V

60 × V = 86.4

V = 86.4 / 60

V = 1.44m/s

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

The action force acts in the eastern direction hitting the wall with a force of 240N, therefore direction after hitting the wall will be in the opposite (western direction) direction, which is the direction of the reaction force

Therefore, velocity is 1.44ms West

Answer:

\(a=\frac{v^2}{r}\)

\(v=\sqrt{a*r}\)

\(r=\frac{v^2}{a}\)

Explanation:

This is the formula for centripetal acceleration in terms of the tangential velocity (v) and the radius of the circular motion (r).  The expression for the acceleration is already given, so simply type it as shown:

\(a=\frac{v^2}{r}\)

For the velocity (v) multiply by "r" both sides and then use the square root to solve for v:

\(a*r=v^2\\v=\sqrt{a*r}\)

For the radius multiply both sides by r and then divide both sides by the acceleration (a) in order to isolate r completely:

\(a*r=v^2\\r=\frac{v^2}{a}\)

Answer:

b and c

Explanation:

you had it correct :)

Answer:

It's C and D.

Explanation:

Answer: D.

Explanation: Just took the quiz.

Answer:

D. F represents the activation energy

Explanation:

Answer:

Reaction is 20N.

Explanation:

In general, Newton's third law of motion explains that when a force is applied on an object, a reaction of equal magnitude applies in the reverse direction of the force.

i.e F = -R

This implies that, reaction is a force in the opposite direction to that of the force applied.

Force can also be related to the weight of an object as;

F = W = mg

Thus to prevent the 20N stone from falling, a force of 20N is applied in the opposite direction. So the reaction, R is 20N.

Answer:

(a) h = 5.1 m

(b) v = 14.13 m/s

Explanation:

(a)

We will use the law of conservation of energy. For this situation it states that:

Loss in Potential Energy of Sphere = Gain in Kinetic Energy of the Sphere

mgh = (1/2)mv²

h = v²/2g   --------------- equation (1)

where,

h = height = ?

v = speed at lowest point = 10 m/s

g = 9.8 m/s²

Therefore,

h = (10 m/s)²/(2)(9.8 m/s²)

h = 5.1 m

(b)

using the equation (1)

h = v²/2g

v = √2gh

where,

v = velocity = ?

g = 9.8 m/s²

h = height = 2(5.1 m) = 10.2 m

Therefore,

v = √[2(9.8 m/s²)(10.2 m)]

v = 14.13 m/s

The height from which the sphere was released is 5.1 m

When the height is doubled, the speed of the sphere becomes 14.14 m/s.

The given parameters:

The height from which the sphere was released is calculated as follows;

\(P.E = K.E\\\\mgh = \frac{1}{2}mv^2\\\\gh = \frac{1}{2}v^2\\\\h = \frac{v^2}{2g}\\\\h = \frac{(10)^2}{2(9.8)} \\\\h = 5.1 \ m\)

When the height is doubled, the speed of the sphere becomes;

\(h = \frac{v^2}{2g} \\\\v^2 = 2gh\\\\v = \sqrt{2gh} \\\\v = \sqrt{2 \times 9.8 \times (2 \times 5.1)} \\\\v = 14.14 \ m/s\)

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