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4 years ago

Lenses can be found in a variety of objects which example does not have a lens?

Physics

2 answers:

Burka [1]4 years ago

4 0

Tbh ! All of them have lens but I would go with B.) Smart Phone

Hope This Helps !!!

Aleksandr [31]4 years ago

4 0

Answer:

The correct option is B). Smart phone.

Explanation:

Consider the provided options:

Diving masks and night vision goggles have a lens.

Electron microscopes have electromagnetic lenses or electron optical lens systems.

Which means diving mask, electron microscope and night vision goggles have a lens.

Thus, the correct option is B). Smart phone.

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Answer: D) It should be handled in a fume hood, away from open flames.

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3 years ago

Hydrogen gas is generated when acids come into contact with certain metals. When excess hydrochloric acid reacts with 2.2 g of (

CaHeK987 [17]

To solve the problem it is necessary to apply the concepts related to Byle's Law and Avogadro's Law.

The ideal gas equation would help us find the final solution to the problem, defined by

$PV = nRT$

Where,

T= Temperature of the gas

R = Universal as constant

n = number of moles

V = Volume

P = Pressure

For our case we have that the mass of Zn is 2.2g in moles would be

$[tex]Zn = \frac{2.2}{65}$ [/tex]

$Zn = 0.0338$

We know that 1 mole of hydrogen gas is proceed by 1 mole of zinc and the result is $Zn^{2+}$ , then Hydrogen can produce the same quantity,

$H_2 = 0.0338$

Applying the previous equation we have that

$V= \frac{nRT}{P}$

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$V = 0.829L$

Therefore the volume of hydrogen gas is collected is 0.829L

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3 years ago

A certain fluid (with properties listed below) is heated from 25 to 75 °C as it moves at 0.2 m/s through a straight thin-walled

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Answer:

not sure. I'll try answering this later

Explanation:

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3 years ago

How to tell if a circuit is connected in.a series.or parallel?

stepladder [879]

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Parallel circuits split the current of resistors, so if you see several diodes connected along different branches or pathways, it will be in parallel.

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3 years ago

a car is moving with a constant speed of 20 meters per second.What total distance does the car travel in 2 minutes

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3 years ago