NCERT Class 8
149. Repeater Machine Similarly, repeater machine is a hypothetical machine which automatically enlarges items several times. For example, sending a piece of wire through a (× 2^4) machine is the same as putting it through a (× 2) machine four times. So, if you send a 3 cm piece of wire through a (× 2^4) machine, its length becomes 3 × 2 × 2 × 2 × 2 = 48 cm. It can also be written that a base (2) machine is being applied 4 times.
01
Aug
149. Repeater Machine Similarly, repeater machine is a hypothetical machine which automatically enlarges items several times. For example, sending a piece of wire through a (× 2^4) machine is the same as putting it through a (× 2) machine four times. So, if you send a 3 cm piece of wire through a (× 2^4) [...]
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149. Repeater Machine Similarly ,
if you send a 3 cm piece of wire through a (× 2^4) machine ,
its length becomes 3 × 2 × 2 × 2 × 2 = 48 cm. It can also be written that a base (2) machine is being applied 4 times. ,
repeater machine is a hypothetical machine which automatically enlarges items several times. For example ,
sending a piece of wire through a (× 2^4) machine is the same as putting it through a (× 2) machine four times. So ,
148. Two machines can be hooked together. When something is sent through this hook up, the output from the first machine becomes the input for the second. (a) Which two machines hooked together do the same work a ( ×10^2) machine does? Is there more than one arrangement of two machines that will work?
01
Aug
148. Two machines can be hooked together. When something is sent through this hook up, the output from the first machine becomes the input for the second. (a) Which two machines hooked together do the same work a ( ×10^2) machine does? Is there more than one arrangement of two machines that will work? 144. [...]
147. Stretching Machine Suppose you have a stretching machine which could stretch almost anything. For example, if you put a 5 metre stick into a (× 4) stretching machine (as shown below), you get a 20 metre stick. Now if you put 10 cm carrot into a (× 4) machine, how long will it be when it comes out?
01
Aug
147. Stretching Machine Suppose you have a stretching machine which could stretch almost anything. For example, if you put a 5 metre stick into a (× 4) stretching machine (as shown below), you get a 20 metre stick. Now if you put 10 cm carrot into a (× 4) machine, how long will it be [...]
Tags:
147. Stretching Machine Suppose you have a stretching machine which could stretch almost anything. For example ,
how long will it be when it comes out? ,
if you put a 5 metre stick into a (× 4) stretching machine (as shown below) ,
you get a 20 metre stick. Now if you put 10 cm carrot into a (× 4) machine ,
146. The given table shows the crop production of a State in the year 2008 and 2009. Observe the table given below and answer the given questions.
01
Aug
146. The given table shows the crop production of a State in the year 2008 and 2009. Observe the table given below and answer the given questions. 146. The given table shows the crop production of a State in the year 2008 and 2009. Observe the table given below and answer the given questions. August [...]
145. There are 864,00 seconds in a day. How many days long is a second? Express your answer in scientific notation.
01
Aug
145. There are 864,00 seconds in a day. How many days long is a second? Express your answer in scientific notation. 00 seconds in a day. How many days long is a second? Express your answer in scientific notation. 145. There are 864 August 1, 2021 Category: Chapter 12 - Exponents and Powers , Maths [...]
144. Fill in the blanks
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Aug
144. Fill in the blanks 144. Fill in the blanks August 1, 2021 Category: Chapter 12 - Exponents and Powers , Maths , NCERT Class 8 ,
143. Use the properties of exponents to verify that each statement is true.
01
Aug
143. Use the properties of exponents to verify that each statement is true. 143. Use the properties of exponents to verify that each statement is true. August 1, 2021 Category: Chapter 12 - Exponents and Powers , Maths , NCERT Class 8 ,
142. The paper clip below has the indicated length. What is the length in standard form.
01
Aug
142. The paper clip below has the indicated length. What is the length in standard form. 142. The paper clip below has the indicated length. What is the length in standard form. August 1, 2021 Category: Chapter 12 - Exponents and Powers , Maths , NCERT Class 8 ,
141. One Fermi is equal to 10^–15 metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard form.
01
Aug
141. One Fermi is equal to 10^–15 metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard form. 141. One Fermi is equal to 10^–15 metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard form. August [...]
140. Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3^–t
01
Aug
140. Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3^–t 140. Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3^–t August 1, 2021 [...]