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3 years ago

Please help!!!!!! Motion and Forces

Physics

1 answer:

aniked [119]3 years ago

4 0

157.5J
KE=1/2 mv^2
KE= 1/2(35kg)(3m/s)^2
KE=(17.5kg)(9m^2/s^2)
KE= 157.5J

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surveyor is using a magnetic compass 8.3 m below a power line in which there is a steady current of 120 A. (a) What is the magne

yawa3891 [41]

Given Information:

Current in power line = I = 120 A

distance from power line = r = 8.3 m

Required Information:

Magnetic field in (µT) at the site of the compass = B = ?

Answer:

Magnetic field in at the site of the compass = 2.89 µT

Step-by-step explanation:

(a) What is the magnetic field in µT at the site of the compass due to the power line?

A current carrying power line produces a magnetic field given by Biot-Savart Law,

B = μ₀I/2πr

Where μ₀ is the permeability of free space, I is the current flowing through power line and r is the distance between the power line and magnetic compass.

B = (4πx10⁻⁷*120)/(2π*8.3)

B = 2.89 µT

Therefore, a magnetic field of 2.89 µT will be produced at the site of the compass due to the power line.

(b) Will this field interfere seriously with the compass reading? The horizontal component of Earth’s magnetic field at the site is 20 µT.

This magnetic field produced due to the power line will interfere with the compass reading.

tan⁻¹(2.89/20) = 8.22°

Which means that compass reading will be deviated from its true value by 8.22° when magnetic field due to the power line and the Earth’s magnetic field are perpendicular with respect to each other.

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3 years ago

Describe an experiment to find the density of copper turnings using a density bottle amd kerosene

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4 years ago

Solve the following problem showing all work, the formula, and correct units.

Temka [501]

5g/cm³

it is not iron.

Explanation:

Given parameters:

Density of iron = 7.874g/cm³

Mass of metal = 2000g

Volume of metal = 400cm³

Unknown:

Density of bar = ?

Is it iron = ?

Solution:

The density of a substance is its mass per unit area. Every substance have an intensive density value that typifies them all.

The density of water and other substances are the same if they maintain their level of pureness.

Density = $\frac{mass }{volume}$

Density of metal bar = $\frac{2000}{400}$ = 5g/cm³

Since this value is not the same as the given density of iron, it is not iron.

learn more:

Density brainly.com/question/5055270

learnwithBrainly

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3 years ago

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alina1380 [7]

The condition of earths atmosphere at a given time and place is the weather.

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atroni [7]

Answer:

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Explanation:

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3 years ago

Please help!!!!!! Motion and Forces​

Please help!!!!!! Motion and Forces