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3 years ago

Which statement best describes the role of folders in your operating system?

Physics

2 answers:

Snezhnost [94]3 years ago

5 0

D. Folders help you organize and maintain files, which are also used to run certain programs.

nordsb [41]3 years ago

3 0

"Folders allow you to organize and maintain files" is the statement that best describes the role of folders in the operating system. The correct option in respect to the question given is option "D". Folders help a person to assimilate all the required files within one common space. It helps the person to find all documents related to a single subject within a single folder. If the folder was not present, then there was probality of missing an important file or loosing valuable time searching through a huge number of files. The folder can easily be moved from one drive to another without any hassle.

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An insect 1.1 mm tall is placed 1.0 mm beyond the focal point of the objective lens of a compound microscope. The objective lens

Pavlova-9 [17]

Answer:

Explanation:

For image formation in objective lens

object distance u = 14 +1 = 15 mm

focal length f = 14 mm .

image distance v = ?

lens formula

$\frac{1}{v} -\frac{1}{u} =\frac{1}{f}$

Putting the values

$\frac{1}{v} +\frac{1}{15} =\frac{1}{14}$

v = 210 mm .

B )

magnification = v / u

= 210 / 15

= 14

size of image = 14 x 1.1 mm

= 15.4 mm

= 15 mm approx

C )

For final image to be at infinity , image produced by objective lens must fall at the focal point of eye piece . so objective lens's distance from the image formed by objective must be equal to focal length of eye piece that is 21 mm .

21 mm is the answer .

D )

overall magnification =

$\frac{210}{15} \times \frac{D}{f_e}$

D = 25 cm , f_e = focal length of eye piece

= 14 x 250 / 21

= 166.67

= 170 ( in two significant figures )

7 0

3 years ago

1. If you add air to a flat tire through a single small entry hole, why does the air spread out to fill the tire?

ikadub [295]

Answer:

The tire fills up just like anything else that holds air when u pump a ball or tire up it fills all the way up cause it is a small confined space and after filling it with air the atoms of the air fill the tire up

Explanation:

7 0

3 years ago

To determine athletes body fat, there are weighed first in air and then again while they are completely underwater. It is found

rodikova [14]

Answer:

1065 Kgm-3

Explanation:

We can determine the relative density of the athlete from the formula;

Relative density of athlete = weight of athlete in air/upthrust on athlete

Since weight of athlete in air= 690 N

Weight of athlete in water = 42 N

Upthrust on athlete= weight in air - weight in water

Upthrust on athlete= 690 N - 42 N = 648 N

Relative density of athlete= 690 N / 648 N

Relative density of athlete= 1.065

Therefore, average density of the athlete= relative density × density of water = 1.065 × 1000 Kgm-3 = 1065 Kgm-3

4 0

4 years ago

What are some superheroes that resemble neurotransmitter functions. Dopamine: Acetylcholine: Endorphins: GABA: Glutamates: Norep

dezoksy [38]

Answer:

Serotonin

___________

7 0

3 years ago

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary

Alenkinab [10]

Answer:

T = 4200N

Explanation:

When the submersible craft is at rest, the tension in the cable is 6000N.

With this information you can calculate the weight of the craft by summing the forces (the summation of the force is zero because the craft is at rest):

$T-W=0\\\\W=T=6000N$

When the craft is going down with a constant speed, there is a drag force of 1800N. Then, by using the second Newton law you have:

$T-W+F_d=0$ (1)

Fd: drag force

The summation of the forces is zero because the craft moves with constant velocity, that is, there is no acceleration.

You calculate the new tension on the cable by solving the equation (1) for T:

$T=W-Fd=6000N-1800N=4200N$

hence, the tension is 4200N

5 0

3 years ago