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2 years ago

What is the mathematical equation for resistivity

Physics

1 answer:

nordsb [41]2 years ago

7 0

Answer:

See below

Explanation:

rho = R A/l R = resistance A = cross sectional area l = length

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What are the 2 factors that increase the electric force between objects?

harkovskaia [24]

The two factors that affect the electric force are the charges and the separation between the objects

Explanation:

The magnitude of the electrostatic force between two objects is given by Coulomb's law:

$F=k\frac{q_1 q_2}{r^2}$

where:

$k=8.99\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the charges of the two objects

r is the separation between the two objects

Looking at the equation, we see that the electric force between objects depends on two factors:

The charges of the objects: the force is directly proportional to the product of the two charges, therefore the greater the charges, the stronger the force
The distance between the two objects: the force is inversely proportional to the square of the distance, therefore the smaller the distance between the objects, the stronger the force

Learn more about electric force:

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3 years ago

An athlete at the Olympic Games runs at constant speed and covers the 100yard dash in 9.52s what will be his time for 100metre d

alex41 [277]

Answer:

His time for 100 meter distance running at the same speed is 10.42 s.

Explanation:

Given:

Distance covered in $t_{0}=9.52$ seconds, $d_{0}=100$ yd.

So, speed for running 100 yards is, $v_{0}=\frac{\textrm{Distance}}{\textrm{Time}}=\frac{100}{9.52}=10.5$

Now, new distance covered is, $d_{new}=100$ m.

The conversion factor for meter to yard is 1 m = 1.0936 yards

Therefore, new distance in yards is, $d_{new}=1.0936 \times 100=109.36\textrm{ yd}$

Speed is same which is equal to 10.5 yd/s.

Therefore, time taken to cover 109.36 yards is given as:

$t_{new}=\frac{d_{new}}{v_{0}}\\t_{new}=\frac{109.36}{10.5}=10.415\approx10.42\textrm{ s}$

Therefore, his time for 100 meter distance running at the same speed is 10.42 s.

5 0

3 years ago

WILL GIVE BRAINLIEST DON'T KNOW IF I SPELLED IT WRONG BUT U KNOW WHAT I MEAN:)

eimsori [14]

Answer: well jabberwocky means like happy or like good vs evil

Synonyms: abracadabra, double talk, gibberish, gobbledygook, mumbo jumbo, babble, blather, blatherskite, gabble, jabber and jargon

Definition: invented or meaningless language; nonsense.

Explanation:

3 0

3 years ago

Read 2 more answers

Please help! Questions are in the picture

Mars2501 [29]

Answer:

3500j

0.250 kg

14.14 m/s

220500 j

93.91 m/s

Explanation:

K.E =1/2 m v^2

first question

1/2×700×10=3500 j

second question

2×78.2/25^2= 0.250 kg

Third question

8kj=8000j

root (2×8000/80)= 14.14 m/s

Last one

P.E=MGH

so it will be

P.E=50×450×9.8=220500 j

the speed

root (2×220500/50)=93.91 m/s

7 0

3 years ago

Where would sound NOT be

Tcecarenko [31]

The answer is D, or Outer Space.

Explanation:

Sound is implemented through mechanical wave transferral, which requires a medium (solid, liquid, or gas) to travel through. Because sound is a mechanical wave, it cannot travel through vacuums (space).

6 0

3 years ago

What is the mathematical equation for resistivity​

What is the mathematical equation for resistivity