The solvent used for extraction is known as.....

Option a) with open('record.bin','wb') as myfile: pickle.dump(lst1,myfile) opens a binary file record bin in write mode and writes the data from a list lst1.

• To open a file in Python in write mode we use .wb. Here, record.bin is the file that is to be opened in write mode. Hence, inside the open bracket, we mention the name of the file - record.bin along with .wb.
• Since the list is added to the file, pickle. dump module is used.
• In the pickle. dump, we mention the name of the list to be added and then myfile is written.
• Hence option a is correct.

Answer:

in python, the return type of input() function is a string.

Explanation:

mark as brainliest.

input() function gives a string datatype output.

• input() function allows the user to enter information into the program.
• Then the program saves that information to an assigned variable.
• That is the job of the input()function,
• To determine which type of information the user entered and stored in the variable, the data type is used.
• Integer, string, float, and boolean are some of the types.
• input()function, will give a string type of data in return after the process.

Navneet English HL Grammar And Writing Skills | Std 8 | Maharashtra State Board | English Medium

Navneet English HL Grammar and Writing skills | Std 8 | Maharashtra State Board | English Medium

Navneet English HL Grammar And Writing Skills | Std 8 | Maharashtra State Board | English Medium

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Salient Features:

1. Entirely based on the Syllabus and English Balbharati

2. An interesting and systematic way of learning the essentials Grammar of English

3. Simple and easy-to-follow explanations.

4. Ample text-based exercises an each chapter for consolidating what has been learnt.

5. Answers for cross-checking

6. A separate section of writing skills.

Navneet English HL Grammar And Writing Skills | Std 8 | Maharashtra State Board | English Medium

0 reviews Write a review

Publisher : Navneet

Author: Navneet

Availability: In Stock

Normally Deliver within 3-4 days

Rs.100

Qty

1

ADD TO CART BUY NOW

product shipping

Description :

Salient Features:

1. Entirely based on the Syllabus and English Balbharati

2. An interesting and systematic way of learning the essentials Grammar of English

3. Simple and easy-to-follow explanations.

4. Ample text-based exercises an each chapter for consolidating what has been learnt.

5. Answers for cross-checking

6. A separate section of writing skills.

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The object should be placed 1.5 cm away from the objective lens to obtain the desired magnification.

Answer:

The eyepiece and objective lens should be separated [tex]11.67[/tex] [tex]cm[/tex] apart.

Explanation:

• To view very high magnification of samples, compound microscopes are used.
• Two types of lenses are used in combination in a compound microscope.

Step 1:

The angular magnification of the eyepiece:

[tex]m_{e} = 1 +\frac{d}{f_{e} }[/tex]

where [tex]d[/tex] is the least distance

           [tex]f_{e}[/tex] is the eyepiece's focal length.

[tex]m_{e} = 1 +\frac{25 cm}{5 cm }[/tex]

[tex]m_{e} = 6[/tex]

Angular magnification value of the objective lens, [tex]m_{o} =\frac{30}{6}[/tex]

                                                                                            [tex]= 5[/tex]

We know that [tex]m_{o} =-\frac{v_{o} }{u_{o} }[/tex]

[tex]v_{o} =-5u_{o}[/tex]

Step 2:

Applying the lens formula:

[tex]\frac{1}{v} -\frac{1}{u} =\frac{1}{f}[/tex]

[tex]\frac{1}{-5u_{o} } -\frac{1}{u_{o} } =\frac{1}{1.25}[/tex]

[tex]u_{o} =-1.5[/tex] [tex]cm[/tex]

[tex]v_{o} =7.5[/tex] [tex]cm[/tex]

[tex]\frac{1}{-25} -\frac{1}{u_{e} } =\frac{1}{5}[/tex]

[tex]u_{e} =-4.17[/tex] [tex]cm[/tex]

So, the distance between the eyepiece and objective lens is

[tex]=(7.5 + 4.17)[/tex] [tex]cm[/tex]

[tex]=11.67[/tex] [tex]cm[/tex]

Hence, the eyepiece and objective lens should be separated [tex]11.67[/tex] [tex]cm[/tex] apart.