Chapter 12 – Exponents and Powers
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.
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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 [...]
139. A half-life is the amount of time that it takes for a radioactive substance to decay to one half of its original quantity. Suppose radioactive decay causes 300 grams of a substance to decrease to 300 × 2^–3 grams after 3 half-lives. Evaluate 300 × 2^–3 to determine how many grams of the substance are left. Explain why the expression 300 × 2^–n can be used to find the amount of the substance that remains after n half-lives.
01
Aug
139. A half-life is the amount of time that it takes for a radioactive substance to decay to one half of its original quantity. Suppose radioactive decay causes 300 grams of a substance to decrease to 300 × 2^–3 grams after 3 half-lives. Evaluate 300 × 2^–3 to determine how many grams of the substance [...]
138. About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in an year? Write your answer in standard notation.
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Aug
138. About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in an year? Write your answer in standard notation. 118. 6^n/6^-2 = 6^3 August 1, 2021 Category: Chapter 12 - Exponents [...]
137. While studying her family’s history. Shikha discovers records of ancestors 12 generations back. She wonders how many ancestors she has had in the past 12 generations. She starts to make a diagram to help her figure this out. The diagram soon becomes very complex.
01
Aug
137. While studying her family’s history. Shikha discovers records of ancestors 12 generations back. She wonders how many ancestors she has had in the past 12 generations. She starts to make a diagram to help her figure this out. The diagram soon becomes very complex. 118. 6^n/6^-2 = 6^3 August 1, 2021 Category: Chapter 12 [...]