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3 years ago

Plsss help I will mark brainlist

Physics

2 answers:

gulaghasi [49]3 years ago

6 0

Metal improves conductivity since Metals usually have small amounts of valance electrons which allow smoother movement through them. Metalloids can either improve or weaken conductivity by adding or removing an electron. Non-metals have poor conductivity because their valance shell haves 4 or more valance electrons.

AKA It is B

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G/O/O/G/L/E

sp2606 [1]3 years ago

4 0

Answer:the 2nd one

Explanation:

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What step of the scientific method involves asking a question based on an observation

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Answer: it’s the first one I think

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4 years ago

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3 years ago

An object is located in air, 25 cm from the vertex of the concave surface of a block of glass (as viewed from the air side of th

Marizza181 [45]

Your question is missing one part as "magnification"

i have completed the missing part below

Answer:

a. $d_{i}=-0.0566cm$

b. $M=441.69$

Explanation:

For this type of numerical we will use the following formulas

$\frac{n1}{d_{o} }+\frac{n_{2} }{d_{i} }=\frac{n_{2}-n_{1} }{R}$ ......... Eq1

where,

$n_{1}$ $=$ refractive index of the medium surrounding refracting surface/object

i.e. $n_{1}$ = $n_{air}$

$n_{2}$ $=$ refractive index of the refracting surface/object

i.e. $n_{2}=n_{glass}$

$d_{0}=$ distance of object from the vertex of the refracting surface

$d_{i}=$ distance of image from the vertex of the refracting surface

$R=$ radius of curvature of the refracting surface

$M=\frac{d_{0} }{d_{i} }$ ........... Eq2

where,

$M=$ magnification

Convention:

$R>0\for\ the\ convex\ refractive\ surface\ of\ curvature\\\ R$

Given:

$n_{1}$ = $n_{air}$ $=1.0$

$n_{2}=n_{glass}$ $=1.5$

$d_{0}=$ $25cm$

$R=-11$ $cm$ because refraction surface is concave

Required:

a. $d_{i}=$ $?$

b. $M=?$

Solution:

a. putting values in eq1, we get

$\frac{1.0}{25}+\frac{1.5}{d_{i} }=\frac{1.5-1.0}{-11}$

$\frac{1.5}{d_{i} }=-0.045-0.040$

$d_{i}=(-0.085)(\frac{1}{1.5} )$

$d_{i}=-0.0566$ cm

b. $M=\frac{25}{-0.05665}$

$M=441.69$

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4 years ago

Imagine that you are an industrial worker in a city in China. What would you put in an e-mail to a relative in the United States

Mumz [18]

In that email, I will tell my relative in the United states that the transition to capitalism now implies that we work for longer hours with less pay.

<h3>What is capitalism?</h3>

The term capitalism means a system in which the means of production is controlled by individuals rather than by the state. Hence, monopoly is possible in a capitalist economy.

In that email, I will tell my relative in the United states that the transition to capitalism now implies that we work for longer hours with less pay and we do not have the social and job security that was once guaranteed in a socialist/communist economy.

Learn more about capitalism:brainly.com/question/679709

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3 years ago

Your camera's zoom lens has an adjustable focal length ranging from 81.0 to 185 mm. What is its range of powers (in D)?

Inessa [10]

Answer:

Maximum

Explanation:

for sure

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3 years ago