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3 years ago

Question 14 of 30

Physics

2 answers:

kiruha [24]3 years ago

8 0

Answer:

Explanation:

HACE 2500 AÑOS NO SE CONOCÍAN LAS CARGAS ATÓMICAS.

docker41 [41]3 years ago

6 0

Answer: a.

Explanation: i have done this before .. hope this helps (⌐■_■)

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A current carrying gold wire has diameter 0.84 mm. The electric field in the wire is 0.49 V/m. What are (a) the current carried

NNADVOKAT [17]

Explanation:

Given that,

Diameter of the gold wire, d = 0.84 mm

Radius, r = 0.42 mm

Electric field in the wire, E = 0.49 V/m

(a) Electric current density is given by :

$J=\dfrac{I}{A}$

And electric field is :

$E=\rho J$

$\rho$ is resistivity of Gold wire

So,

$E=\dfrac{\rhi I}{A}\\\\I=\dfrac{EA}{\rho}\\\\I=\dfrac{0.49\times \pi (0.42\times 10^{-3})^2}{2.44\times 10^{-8}}\\\\I=11.12\ A$

(b) The potential difference between two points in the wire is given by :

$V=E\times l\\\\V=0.49 \times 6.4\\\\V=3.136\ V$

(c) Resistance of a wire is given by :

$R=\rho \dfrac{l}{A}\\\\R=2.44\times 10^{-8}\times \dfrac{6.4}{\pi (0.42\times 10^{-3})^2}\\\\R=0.281\ \Omega$

Hence, this is the required solution.

8 0

4 years ago

A physical science test book has a mass of 2.2 kg what is the weight on mars??? please help

Nastasia [14]

Weight = (mass) x (gravity)
= (2.2 kg) x (3.7 m/s^2)

= 8.1 newtons. (about 1.84 pounds)

4 0

3 years ago

An example of convection and conduction within a BBQ. I also accept diagrams but please write honestly or I will report.

qwelly [4]

Conduction could be the way in which heat is transferred through a sausage to get it up to cooked temperature. convection could be the air around the barbecue and the smell of the barbecue being carried on thermal convection currents. hope this is honest enough

7 0

3 years ago

A human hair is approximately is 50um in diameter. express this diameter in meters

stealth61 [152]

50 μm = 5 × 10⁻⁵ m in diameter

<h3>Steps</h3>

1μm = 1 x $10^{-6}$ m

<h3>Given</h3>

1μm = 1 x $10^{-6}$ m

50μm = 50 x $10^{-6}$ m

50μm = 50 x 10 x $10^{-6}$

50μm = 5 x $10^{-5}$ m

<h3>Conclusion</h3>

A human hair is approximately 50 μm = 5 × 10⁻⁵ m in diameter

<h3>How big is a human hair on average?</h3>

between 17 and 181 micrometers

The typical diameter of human hair can range from 17 micrometers to 181 micrometers, according to research. Using 50 micrometers as an average figure for its diameter, this translates to 50,000 nanometers.

<h3>What is a human hair's diameter in inches?</h3>

The finest hair is flaxen, with a diameter ranging from 1/1500 to 1/500 of an inch. the coarsest hair is black, measuring between 1/450 and 1/140 of an inch.

learn more about human hair diameter here

<u>brainly.com/question/13147893</u>

#SPJ4

6 0

1 year ago

10.20) Perform the following conversions: (a) 0.912 atm to torr,(b) 0.685 bar to kilopascals, (c) 655 mm Hg to atmospheres,(d) 1

masha68 [24]

Answer:

(a) 693.12 torr

(b) 68.5 kilopascals

(d) 1.306 atmospheres

(e) 36.74 psi

Explanation:

(a) 0.912 atm = 0.912 atm × 760 torr/1 atm = 693.12 torr

(b) 0.685 bar = 0.685 bar × 100 kPa/1 bar = 68.5 kPa

(d) 1.323×10^5 Pa = 1.323×10^5 Pa × 1 atm/1.01325×10^5 Pa = 1.306 atm

(e) 2.50 atm = 2.50 atm × 14.696 psi/1 atm = 36.74 psi

5 0

3 years ago

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