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aniked [119]
4 years ago
11

The microscope available in your biology lab has a converging lens (the eyepiece) with a focal length of 2.50 cm mounted on one

end of a tube of adjustable length. At the other end is another converging lens (the objective) that has a focal length of 1.00 cm . When you place the sample to be examined at a distance of 1.30 cm from the objective, at what length l will you need to adjust the tube of the microscope in order to view the sample in focus with a completely relaxed eye
Physics
1 answer:
Natasha_Volkova [10]4 years ago
5 0

Answer:

6.83 cm

Explanation:

Given data:

Focal length of the eye piece, f_e = 2.50 cm

Focal length of the converging lens, f = 1.00 cm

distance of the object, p = 1.30 cm

Now,

we have the lens equation as:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

q is the distance of the image

thus,

on substituting the values in the above equation, we get

\frac{1}{1.00}=\frac{1}{1.30}+\frac{1}{q}

or

q = 4.33 cm

now, the image is formed at the focal point of the eye piece,

therefore, the distance between the objective and the eyepiece, d = f_e + q = 2.50 cm + 4.33 cm

or

d = 6.83 cm

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1.2 A

Explanation:

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3 years ago
What are the applications of pascal's principle​
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3 years ago
On a snowy day, max (mass = 15 kg) pulls his little sister maya in a sled (combined mass = 20 kg) through the slippery snow. max
sesenic [268]

Work done by a given force is given by

W = F.d

here on sled two forces will do work

1. Applied force by Max

2. Frictional force due to ground

Now by force diagram of sled we can see the angle of force and displacement

work done by Max = W_1 = Fdcos\theta

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Now similarly work done by frictional force

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7 0
4 years ago
A truck with 28-in.-diameter wheels is traveling at 50 mi/h. Find the angular speed of the wheels in rad/min, *hint convert mile
solong [7]

Answer:

Angular speed ω=3771.4 rad/min

Revolution=5921 rpm

Explanation:

Given data

d=28in\\r=d/2=28/2=14in\\v=50mi/hr

To find

Angular speed ω

Revolution per minute N

Solution

First we need to convert the speed of truck to inches per mile

as

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1 hour=60 minutes

so

v=(50*\frac{63360}{60} )\\v=52800in/min

Now to solve for angular speed ω by substituting the speed v and radius r in below equation

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To solve for N(revolutions per minute) by substituting the angular speed ω in the following equation

N=\frac{w}{2\pi }\\ N=\frac{3771.4rad/min}{2\pi }\\ N=5921RPM  

3 0
3 years ago
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