Home
Class 11
PHYSICS
Subtract according to significant digit....

Subtract according to significant digit.
`3.9xx10^(5)-2.5xx10^(4)`

Text Solution

Verified by Experts

`3.9xx10^(15)=39.0xx10^(4)`
`2.5xx10^(4)=(2.5xx10^(4))/(36.5xx10^(4))=3.65xx10^(5)`
Here, least significant digit is 2 hence it will be represented as after rounding off `3.9xx10^(5)-2.5xx10^(4)=3.6xx10^(5)`
Promotional Banner

Topper's Solved these Questions

  • UNITS AND MEASUREMENT

    KUMAR PRAKASHAN|Exercise SECTION -D (NECERT EXEMPLAR SOLUTIONS) (MULTIPLE CHOICE QUESTIONS (MCQS)|12 Videos

  • UNITS AND MEASUREMENT

    KUMAR PRAKASHAN|Exercise SECTION -D (NECERT EXEMPLAR SOLUTIONS) (Multiple Choice Questions (More than one options))|6 Videos

  • UNITS AND MEASUREMENT

    KUMAR PRAKASHAN|Exercise SECTION -B (NUMERICALS) (QUESTIONS)|29 Videos

  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Question Paper|11 Videos

  • WAVES

    KUMAR PRAKASHAN|Exercise SECTION-F (Questions From Module) (Sample questions for preparation of competitive exams)|23 Videos

Similar Questions

Explore conceptually related problems

Write no. of significant digit in (3204.80)xx10^(5)

Write number of significant digits (i) 62.3 cm (ii) 6.23 xx 10^(1) cm (iii) 20.00 (iv) 0.02 xx 10^(-19) (v) 500.000 (vi) 0.5210 (vii) 896.80 (viii) 201 (ix) 1200 (x) 1200 N.

State the number of significant 2.64xx10^(24) kg

Show with regards to significant figure (i) 908 + 2.76 (ii) 999-989 (iii) 4.0 xx 10^(4) - 2.5 xx 10^(2) (iv) 4.0 xx 10^(4) - 2.5 xx 10^(5) (v) 6.75 xx 10^(3) + 4.52 xx 10^(2) (vi) 625 + 125

The presssure of a medium is changed from 1.01xx10^(5) Pa to 1.165xx10^(5) Pa and change in volume is 10 % keeping temperature constant . The bulk modulus of the medium is (a) 204.8 xx 10^(5) Pa (b) 102.4xx10^(5) Pa (c ) 5.12xx10^(5) Pa (d) 1.55xx10^(5) Pa

Comprehension 3: If P is the non negative characteristic of (log)_(10)N , the number of significant digit in N i s P+1 . If P is the negative characteristic of (log)_(10)N , then number of zeros after decimal before a significant digit start are P-1 . (Use log_(10) 2=0. 301,log)_(10)3=0. 4771 ) Number of significant digit in N , where N=(5/3)^(100), is- a. 23 b. 22 c. 21 d. none

KUMAR PRAKASHAN-UNITS AND MEASUREMENT-SECTION -C (OBJECTIVE QUESTIONS (VSQS)
  1. Which are inferior planets ?

    Text Solution

    |

  2. What is elongation ?

    Text Solution

    |

  3. In modern times which method is used to measure the distance between t...

    Text Solution

    |

  4. "Fundamental unit of length is kilometer and fundamental unit of mass ...

    Text Solution

    |

  5. x=a+bt+ct^(2)=x in metre and tis in sec then write unit of a, b, c.

    Text Solution

    |

  6. Light year is unit of …... .

    Text Solution

    |

  7. A physical quantity has unit ("Watt")/(m^(2)) write its dimension.

    Text Solution

    |

  8. y=x^(2)r+M^(1)L^(1)T^(-2) is dimensionally correct. If r represent dis...

    Text Solution

    |

  9. Pressure P = FK where F is force, obtain dimension of K.

    Text Solution

    |

  10. Obtain dimension of rho gv where, rho = density, g = acceleration, v...

    Text Solution

    |

  11. Explain supplementary quantities and their unit of SI system.

    Text Solution

    |

  12. The mass of an object is (225 +- 0.05) gm calculate percentage error i...

    Text Solution

    |

  13. If theta(1)=(25.5+-0.1)^(@)C and theta(2)=(35.3+-0.1)^(C), then find t...

    Text Solution

    |

  14. Subtract according to significant digit. 3.9xx10^(5)-2.5xx10^(4)

    Text Solution

    |

  15. Why 10^(6) km cannot be represented by Mkm?

    Text Solution

    |

  16. Volume and total surface area of a cube is equal. Find volume of cube....

    Text Solution

    |

  17. Write no. of significant digit in (3204.80)xx10^(5)

    Text Solution

    |

  18. Which number is obtained by rounding off 96378 upto 2 significant digi...

    Text Solution

    |

  19. Explain "By changing unit zero are added. This will not change number ...

    Text Solution

    |

  20. By suitable example show that "Trailing zero in nonzero number are not...

    Text Solution

    |