at point p the magnetic field due to a long straight wire carrying a current of 2.0 a is 1.2 µt. how far is p from the wire? ( μ 0 = 4π × 10 -7 t ∙ m/a)\

Answer:

to verify his identity and authorization to work in the United States

Explanation:

That us what a USCIS I-9 form is for.....

  (NOTE : it is Ɪ - 9     not 1-9   )

The amount of power required for the firefighter to run up the stairs in 60s is 28.66 watts

Power is described as the amount of energy transferred or converted per unit time.

parameters given ate

mass= 80kg

distance = 60seconds

We need to calculate the distance over which the force is applied. In this case, the firefighter is running up a 21.5m flight of stairs, so the distance is 21.5m.

Then, we calculate the amount of work required, we use the formula

Work done = Force* distance

Work done =  80kg * 21.5m = 1720 Newton

Therefore power = work done/ time

= 1720/ 60

Power = 28.66 watts

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Answer:

A mass driver or electro magnetic catapult is a proposed method of non-rocket space launch which would use a linear motor to accelerate and catapult payloads up to high speeds. All existing and contemplated mass drivers use coils of wire energized by electricity to make electromagnets.

Explanation:

may i be marked brainliest?

(a) The type of simple machine given in image is wheel and axle.

(b.i) The velocity ratio of the machine is 5.

(b.ii) The mechanical advantage of the machine is  4.

(b.iii) The efficiency of the simple machine is 80%.

(a) The type of simple machine given in image is know as the wheel and axle, as we can see the wheel with bigger and axle with smaller radius.

(b.i) The velocity ratio of the machine is calculated by applying the following formula;

V.R = R/r

V.R = 20 cm / 4 cm

V.R = 5

(b.ii) The mechanical advantage of the machine is calculated as follows;

M.A = Load / Effort

M.A = 200 N / 50 N

M.A = 4

(b.iii) The efficiency of the simple machine is calculated as follows;

E = M.A / V.R x 100%

E = 4 / 5  x 100%

E = 80%

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Answer:

Los coeficientes de fricción estática y cinética son \(\frac{1}{15}\) y \(\frac{1}{60}\), respectivamente.

Explanation:

Por la Primera Ley de Newton, sabemos que la fuerza externa debe tener igual magnitud y dirección contraria a la fuerza de reacción (fricción). Puesto que el trineo se mueve sobre una superficie horizontal, la magnitud de la fuerza normal es la del peso (\(W\)), en newtons. El coeficiente de fricción estática (\(\mu_{s}\)), sin unidad, es la razón de la fuerza de fricción justo antes del movimiento inminente (\(F\)), en newtons, a la fuerza normal (\(N\)), en newtons:

\(\mu_{s} = \frac{F}{W}\) (1)

Si sabemos que \(F = 40\,N\) y \(W = 600\,N\), entonces el coeficiente de fricción estática es:

\(\mu_{s} = \frac{F}{W}\)

\(\mu_{s} = \frac{40\,N}{600\,N}\)

\(\mu_{s} = \frac{1}{15}\)

El coeficiente de fricción cinética (\(\mu_{k}\)), sin unidad, es la razón de la fuerza de fricción experimentada por el trineo en movimiento (\(F\)), en newtons, a la fuerza normal:

\(\mu_{k} = \frac{F}{W}\) (2)

Si sabemos que \(F = 10\,N\) y \(W = 600\,N\), entonces el coeficiente de fricción cinética es:

\(\mu_{k} = \frac{F}{W}\)

\(\mu_{k} = \frac{10\,N}{600\,N}\)

\(\mu_{k} = \frac{1}{60}\)

Los coeficientes de fricción estática y cinética son \(\frac{1}{15}\) y \(\frac{1}{60}\), respectivamente.

The process of heating a cooled cup of coffee from 55°F to 130°F is an example of endothermic reaction. Endothermic reactions absorb energy in the form of heat and result in an increase in temperature. The coffee absorbs the energy from the microwave, causing its temperature to rise.

Heat reactions, also known as thermochemical reactions, are chemical reactions that involve a change in temperature. These reactions can either be endothermic or exothermic. Endothermic reactions absorb heat and result in a decrease in temperature, while exothermic reactions release heat and result in an increase in temperature. Heat reactions play an important role in many industrial processes such as chemical synthesis, power generation, and food preparation. They can also occur in biological systems, where heat energy is used to drive metabolic processes. Understanding heat reactions is essential for developing sustainable energy technologies, controlling environmental pollution, and improving human health.

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False. if a person shoots a beam from a flashlight from a car in the same direction the car is moving at 60mph, the speed of the beam of light will be the speed of light plus 60mph

When a person shoots a beam from a flashlight from a car moving at 60mph in the same direction, the speed of the beam of light will not be the speed of light plus 60mph. According to the theory of relativity, the speed of light remains constant (approximately 299,792 kilometers per second) regardless of the motion of the light source or the observer.

A beam of light is a concentrated stream of electromagnetic radiation that travels in a straight line through space or a medium, such as air or water. Light is a form of energy that travels in waves and can be characterized by its wavelength, frequency, and polarization.

The behavior of a beam of light can be described by the laws of optics, which govern the way that light interacts with surfaces, lenses, and other optical components. For example, light can be refracted or bent when it passes through a lens or a prism, and it can be reflected off of surfaces at different angles depending on the angle of incidence and the surface's properties.

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A

An object at rest will remain at rest unless acted on by a force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by a force.

Explanation:

Answer:

Law of inertia is Newton's first law of motion..

Explanation:

It means that a body will tend to be in it's motion or tend to move in a straight line unless any external force is acted upon it..

Eg: while you are travelling in bus.. If breaks are suddenly applied your body falls forward because you were in motion with bus but it tries to be in motion when breaks are applied...

The amount of time required to generate energy on the exercise bike is almost impractical, and other sources of energy should be considered.

Let's start with calculating the amount of energy that the AC unit consumes in a day.

Power = Voltage x Current

The power consumption of the AC unit is 3500 Watts.

Time = Power / Voltage x Current (Ohm's Law)

Assuming that your home uses 120 volts AC, the amount of current needed is as follows:

Current = Power / Voltage

= 3500 W / 120 V

= 29.16 A.

The time required to operate the AC unit for four hours per day is:

Time = Power / Voltage x Current

= 3500 W x 4 hr / 120 V x 29.16 A

= 12 hours.

Now, if you can generate a consistent power of 300 watts on the exercise bike, the amount of time you'd need to work out each day to keep the AC unit running for four hours would be:

Time required for the exercise bike = Time for AC Unit x (Power required by AC unit / Power generated by exercise bike)

Time required for the exercise bike = 4 hours x (3500 W / 300 W)

Time required for the exercise bike = 46.7 hours.

Using an exercise bike to generate electricity is a great idea, but it would be difficult to generate enough energy to keep large home appliances running, such as a central AC unit.

In this case, the amount of time required to generate energy on the exercise bike is almost impractical, and other sources of energy should be considered.

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The tension in the cello string is approximately 88.6 N.

The frequency of the fundamental mode of vibration of a string can be calculated using the formula:

f = (1/2L) √(T/μ)

Where

We can rearrange this formula to solve for the tension T:

T = (4π^2μL^2)f^2

Where we have substituted the given frequency f and the length of the string L.

The linear mass density of the string μ is given by the mass per unit length, which can be calculated as:

μ = m/L

Where m is the mass of the string.

Substituting the given values into the formula for T, we get:

T = (4π^2)(m/L)(L^2)(f^2)

T = 4π^2mf^2

T = 4π^2(0.0018 kg)(113 Hz)^2

T ≈ 88.6 N

Therefore, the tension in the cello string is approximately 88.6 N.

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Answer:

Colour of any object is by the colour of light it reflects i.e if white light is incident on the object,it will reflect blue color.so it will appear blue.But if red light is incident on it,it will not reflect that and absorb it.so as it will not reflect any light it will appear black.

Explanation:

Answer:

But once the core runs out of hydrogen, the star starts to contract again briefly, until a shell of hydrogen around the core becomes hot enough to fuse into helium. When this happens, the radiation pushes the outer layers of the star far out into space, turning the star into a red giant

Explanation:

Correct?

Answer:

chemical - electrical- light

The magnitude of the force exerted on the 0.02 C point charge in a 400 N/C electric field is 8 N. It is important to note that the force is a vector quantity, meaning it has both magnitude and direction. In this case, the direction of the force would depend on the polarity of the charge and the direction of the electric field.

The magnitude of the force exerted on a point charge in an electric field can be determined using the formula:

F = q * E

Where: F is the force exerted on the charge, q is the magnitude of the charge, and E is the magnitude of the electric field.

In this case, the magnitude of the electric field is given as 400 N/C, and the magnitude of the point charge is 0.02 C.

Substituting these values into the formula, we get:

F = (0.02 C) * (400 N/C)

Calculating this, we find:

F = 8 N

Therefore, the magnitude of the force exerted on the 0.02 C point charge in a 400 N/C electric field is 8 N. It is important to note that the force is a vector quantity, meaning it has both magnitude and direction. In this case, the direction of the force would depend on the polarity of the charge and the direction of the electric field.

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Answer:

the size, length, or amount of something, as established by measuring.

Explanation:

Answer: Manipulated Variable

Explanation:

The thing that is changed on purpose is called the manipulated variable. Sometimes it is also called the independent variable, the scientist may change this to discover something new or change it for better results.

Assume for the moment that it shows a young child embracing her mother before he departs for a tour of service abroad. How would you employ science to analyse her effects.

What in physics is an energy?

The definition of energy is ability to do work," which is the capacity to apply a force that causes an item to move. organismal biology the study of sentient creatures Social science is the study of people and society.

photo of How might science be used for research,Students who study science get the chance to learn more about how and how things work. Children can learn about the environment they live in through science.

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Answer: The science I would use to study the impact of the father’s departure from her family would be interpretive sociology.

Explanation: The reason I chose this science is because it focuses on the cause of people’s actions.

The minimum thickness of the electrolyte must be at least 1/108 m, or 0.009 m.

Electrolytes are minerals found naturally in the body, including sodium, potassium, chloride, calcium, phosphorus, and magnesium. They play a key role in maintaining healthy bodily functions, as they help regulate fluid balance, blood pressure, and the pH level of the body’s fluids. When these electrolytes become imbalanced, it can lead to a variety of health issues, including dehydration, muscle cramps, headaches, and fatigue. To maintain electrolyte balance, one needs to consume the right amount of electrolytes through both diet and supplementation.

The absolute minimum thickness of the electrolyte would be determined by the dielectric breakdown strength of the electrolyte, which is 108 V/m. The voltage across the electrolyte will be 1 V, so the minimum thickness of the electrolyte must be at least 1/108 m, or 0.009 m.

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Complete Question:
4.8 Given that fuel cell voltages are typically around 1 V or less, what would be the absolute minimum possible functional electrolyte thickness for a SOFC if the dielectric breakdown strength of the electrolyte is 108 V/m?

stop your hand so it doesn't hurt as much and if u stop your hand it would make more of an impact because if your hand bounces it means not enough strength so she should stop her hand

When three different resistors are connected in series to a battery, the current through all resistors is the same.

In a series circuit, there is only one path for current to flow through. Current is the same through each component.

In a series circuit, the total voltage is divided across each component, and the voltage drop across each component is proportional to its resistance.

The equivalent resistance of the circuit is the sum of all resistors. It is not an algebraic sum, rather it is the arithmetic sum of the resistors. Hence, option A is incorrect.

The other two statements are also incorrect as the voltage on each resistor is not the same, it is divided across each resistor in proportion to its resistance. Therefore, the correct statement about the given circuit is: Currents through all resistors are the same.

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The dot product is 25, the angle is \(\theta = cos^{-1} \frac{25}{\sqrt{35} \times \sqrt{21}}\), the cross product is 1i + (-6)j + (-7)k, and the area of the parallelogram spanned by vectors A and B is \(\sqrt{86}\).

Given,

A = 5i + 3j + k

B = 4i + j + 2k

i. Dot Product (A · B):

The dot product of two vectors A and B is given by the sum of the products of their corresponding components.

\(A.B = (A_x \times B_x) + (A_y \times B_y) + (A_z \times B_z)\\A.B = (5 \times 4) + (3 \times 1) + (1 \times 2) \\= 20 + 3 + 2 \\= 25\)

ii. Angle between vectors A and B:

The angle between two vectors A and B can be calculated using the dot product and the magnitudes of the vectors.

\(cos\theta = (A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} ((A.B) / (|A| \times |B|))\\A = \sqrt{(5^2 + 3^2 + 1^2)} =\\ \sqrt{35}\\B = \sqrt{(4^2 + 1^2 + 2^2)} \\= \sqrt{21}cos\theta = \frac{(A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} \frac{25}{\sqrt{35} \times \sqrt{21}}}\)

iv. Cross Product (A × B):

The cross product of two vectors A and B is a vector that is perpendicular to both A and B and its magnitude is equal to the area of the parallelogram spanned by A and B.

\(A\times B = (A_y \timesB_z - A_z \timesB_y)i + (A_z \timesB_x - A_x \timesB_z)j + (A_x \times B_y - A_y \times B_x)k\\A\times B = ((3 \times 2) - (1 \times 1))i + ((1 \times 4) - (5 \times 2))j + ((5 \times 1) - (3 \times 4))k\\= 1i + (-6)j + (-7)k\)

Area of the parallelogram spanned by vectors A and B:

The magnitude of the cross product A × B gives us the area of the parallelogram spanned by A and B.

Area = |A × B|

Area of the parallelogram spanned by vectors A and B:

Area = |A × B| =

\(\sqrt{(1^2 + (-6)^2 + (-7)^2}\\\sqrt{1+36+49\\\\\sqrt{86}\)

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Answer:

circuit b will have the higher current than circuit a

The IMA of a wheel and axle could be increased by increasing the size of the wheel and/or the decreasing size of the axle.

The IMA of a wheel and axle is  ratio of radius of wheel to radius of axle. To increase IMA of wheel and axle, you can increase the size of the wheel, which will increase the radius of the wheel and therefore increase IMA. For example, if you have a wheel with a radius of 10cm and an axle with a radius of 2cm, IMA of the wheel and axle is 5cm . If you increase radius of wheel to 20cm, IMA becomes 10cm. If you decrease  radius of axle to 1 cm, IMA becomes 20cm .

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During capillary action, the water will rise higher in a narrower tube or channel with a smaller diameter.

This is because the smaller diameter creates a greater surface tension, which pulls the water upward against gravity. Additionally, a surface with a higher degree of attraction to the water molecules will also enhance capillary action, allowing the water to rise higher.
                                     This is because the adhesive forces between the water molecules and the tube's surface, as well as the cohesive forces between the water molecules themselves, are stronger in smaller diameter tubes, leading to a greater capillary rise.

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Explanation:

hope this helps you

.....,.......

Answer:

\(a=114\ m/s^2\)

Explanation:

Given that,

Mass of an object, m = 3.68 kg

It is whirled in a horizontal circle of radius 881 cm or 8.81 m

The object completes 10.8 revolutions every 18.8 s.

We need to find the centripetal acceleration of the object. It is given by the formula as follows :

\(a=\omega^2 r\) ...(1)

Where \(\omega\) is angular velocity

10.8 revolutions = 67.85 rad

\(\omega=\dfrac{67.85\ rad}{18.8\ s}\\\\=3.6\ rad/s\)

Put values in equation (1)

\(a=3.6^2\times 8.81\\\\a=114\ m/s^2\)

So, the centripetal acceleration of the object is \(114\ m/s^2\).

Answer:

Range=U√2H/g.

=800√2×80/10.

800√160/10.

800√16.

800×4=3200m

A rifle bullet is fired from the top of a cliff at an angle of 300 below the horizontal. The initial velocity of the bullet is 800 m/s. If the cliff is 80 m high, 3200 m it travel horizontally.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.

Range=U√2H/g.

= 800√2×80/10.

= 800√160/10.

= 800√16.

= 800×4

= 3200 m

A rifle bullet is fired from the top of a cliff at an angle of 300 below the horizontal. The initial velocity of the bullet is 800 m/s. If the cliff is 80 m high, 3200 m it travel horizontally.

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Answer:

20.9 m/s

Explanation:

Given that,

Initial velocity, u = 16 m/s

We need to find its velocity 0.5 s into flight when a ball straight up into the air. Let it is v. It will move under the action of gravity. Using first equation of motion to find it as follows :

v=u+at

Here, a = g

v = 16 + 9.8(0.5)

v = 20.9 m/s

So, the final velocity is 20.9 m/s.

Answer:

Josie's ball faster than T

Answer:

180

Explanation:

Work done= Force x distance

So rearrange the formula to find the force

Force= Work done/distance

Force= 6/30

Force= 1/5 N or 0.2 N