4 years ago

A good thesis statement does all of the following

Physics

2 answers:

Vesna [10]4 years ago

4 0

Propose a unique explanation

sveticcg [70]4 years ago

4 0

The answer would be B).
Cheers!
AlexFray555

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An object is 16.0cm to the left of a lens. The lens forms an image 36.0cm to the right of the lens. a) What is the focal length

PSYCHO15rus [73]

Answer:

-2.25

Real and inverted image

Explanation:

u = Object distance = 16 cm

v = Image distance = 36 cm

f = Focal length

Lens Equation

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}=\frac{1}{16}+\frac{1}{36}\\\Rightarrow \frac{1}{f}=\frac{13}{144}\\\Rightarrow f=\frac{144}{13}=11.07\ cm$

Focal length of the lens is 11.07 cm. Positive value indicates the lens is a convex lens

Magnification

$m=-\frac{v}{u}\\\Rightarrow m=-\frac{36}{16}\\\Rightarrow m=-2.25$

Since magnification is negative the image inverted

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A refrigerator has a coefficient of performance equal to 4.00. The refrigerator takes in 110 J of energy from a cold reservoir i

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Answer:

The correct answer is:

(a) 27.5 Joules

(b) 141.5 Joules

Explanation:

Given:

Energy,

$Q_c = 110 \ J$

Coefficient of performance refrigerator,

$Cop(refrig)=4$

(a)

As we know,

⇒ $Cop(refrig) = \frac{Q_c}{Work}$

or,

⇒ $Work=\frac{Q_c}{Cop(refrig)}$

$=\frac{110}{4}$

$=27.5 \ Joules$

(b)

⇒ $Heat \ expelled = Heat \ removed +Work \ done$

or,

⇒ $Q_h = Q_c+Work$

$=114+27.5$

$=141.5 \ Joules$

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