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goldenfox [79]
3 years ago
7

Which value is NOT equivalent to the others?

Physics
1 answer:
pishuonlain [190]3 years ago
8 0

Answer:

A) 5 × 1011nm

I think It's A

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c she's very clever

Explanation:

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1) Una carga de 10 uC colocada en un campo eléctrico experimenta una fuerza de 60x104N ¿Cuál es la magnitud del campo eléctrico?
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Answer:

pls translate in English

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3 years ago
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A 1000-n weight is hanging from a 2.0 m long aluminum rod. A 500-n weight is hanging from a 1.0 m long aluminum rod. The two alu
Hunter-Best [27]

Answer:

Both rod have the same tensile stress

Explanation:

Given information,

The weight first rod, W_{1} = 1000 N

The length of first rod, l_{1} = 2.0 m

The weight second rod, W_{2} = 500 N

The length of second rod, l_{2 = 1.0 m

The equation of tensile stress, σ = \frac{F}{A}

where

σ = tensile stress (N/m^{2} or Pa)

F = Force (N)

A = Area (N/m^{2} or Pa)

so

σ1 =  \frac{W_{1} }{A_{1} }, A = 2πl

    = \frac{1000}{2\pi(2) }

    = \frac{250}{\pi } N/m^{2}

now calculate σ2

σ2 =  \frac{W_{2} }{A_{2} }

     = \frac{500}{2\pi(1) }

     = \frac{250}{\pi } N/m^{2}

σ1/σ2 = \frac{250}{\pi } / \frac{250}{\pi }

σ1/σ2 = 1

σ1 = σ2

Hence, the tensile stress of first and second rod are the same.

5 0
4 years ago
A boy finds an abandoned mine shaft in the woods, and wants to know how deep the hole is. He drops in a stone, and counts 4 seco
Shalnov [3]

The shaft is 78m approximately deep. The correct option is D which is 78 meters

<h3>What are Sound Waves ?</h3>

Sound waves are longitudinal. That is, the direction of the waves is parallel to the direction of its propagation of particles.

Given that a boy finds an abandoned mine shaft in the woods, and wants to know how deep the hole is. He drops in a stone, and counts 4 seconds before he hears the "plunk" of the stone hitting the bottom of the shaft.

  • The speed of the sound V = 330m/s
  • The time it takes the sound to reach the top = t

Speed V = distance / time

330 = h/t

Make t the subject of formula

t = h/330

As the stone is dropped, initial velocity = 0, Using the formula

h = 1/2gT²

But T = 4 - t

T = 4 approximately

Substitute all the parameters

h = 1/2 × 9.8 × (4)²

h = 4.9 × (16)

h = 78.4m

Therefore, the shaft is 78m approximately deep. The correct option is D which is 78 meters

Learn more about sound wave here: brainly.com/question/16093793

#SPJ1

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2 years ago
What is the amount of a certain isotope that occurs in a natural sample of an element?
svet-max [94.6K]

last answer better for question

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3 years ago
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