Home
Class 11
PHYSICS
The mass of a box measured by a grocer's...

The mass of a box measured by a grocer's balance is 2.3 kg. Two gold pieces 20.15 g and 20.17 g are added to the box.
(i) What is the total mass of the box?
(ii) The difference in masses of the pieces to correct significant figures.

Text Solution

Verified by Experts

(i) Mass of box = 2.3 kg
Mass of gold pieces = 20.15 + 20.17 = 40.32 g = 0.04032 kg
Total mass = 2.3 + 0.04032 = 2.34032 kg
In correct significant figure mass = 2.3 kg (as least decimal)
(ii) Difference in mass of gold pieces = 0.02 g
In correct significant figure (2 significant fig, minimum decimal) will be 0.02 g
Promotional Banner

Topper's Solved these Questions

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED ( SHORT ANSWER QUESTIONS (1 MARK))|15 Videos

  • MOTION OF SYSTEM OF PARTICLES AND RIGID BODIES

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED - III (LONG ANSWER QUESTIONS (5 MARKS))|6 Videos

  • OSCILLATIONS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (IV NUMERICAL PROBLEMS )|10 Videos

Similar Questions

Explore conceptually related problems

Two bocks of masses 10 kg and 20 kg are placed on the X-axis. The first mass is moved on the axis by a distance of 2 cm. By what distance should the second mass be moved to keep the position of the centre of mass unchanged?

Two small bodies of masses 2.00 kg and 4.00 kg are kept at rest at a separation of 2.0 m. Where should a particle of mass 0.10 kg be placed to experience no net gravitational force from these bodies? The particle is placed at this point. What is the gravitational potential energy of the system of three particle with usual reference level?

Figure shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. A. What is the reading of the balance? B. Will the reading change if the balance is heavy, say 2.0 kg?

A copper piece of mass 10 g is suspended by a vertical spring. The spring elongates 1 cm over its natural length to keep the piece in equilibrium. A beaker containing water is now placed below the piece so as to immerse the piece completely in water. Find the elongation of the spring. Density of copper =9000 kgm^-3. Take g=10ms^-2

The two blocks in an Atwood machine have masses 2.0 kg and 3.0 kg. Find the work done by gravity during the fourth second after the system is released from rest.

A helicopter of mass 2000 kg rises with a vertical acceleration of 15 m//s^2 . The total mass of the crew and passengers is 500 kg. Give the magnitude and direction of the : (i) Force on the floor of the helicopter by the crew and passenger. (ii) Action of the rotor of the helicopter on the surrounding air (iii) Force on the helicopter due to the surrounding air (g =10 m//s^2)

Figure shows a man of mass 60 kg standing on a light weighting machine kept in a box of mass 30 kg. The box is hanging from a pulley fixed to the ceiling through a light rope, the other end of which is held by the man himself. If the man manages to keep the box at rest, what is the weight shown by the machine? What force should he exert on the rope to get his correct weight on the machine?

A mass of 6kg is suspended by a rope of length 2m from a celling a force of 50N in the horizontal direction is applied at the midpoint of the rope as shown in the figure what is the angle the rope makes with the vertical is equalibrium take g=10 ms^(-2) neglect mass of the rope

FULL MARKS-NATURE OF PHYSICAL WORLD AND MEASUREMENT -ADDITIONAL QUESTIONS SOLVED ( SHORT ANSWER QUESTIONS (2 MARK))
  1. The vernier scale of a travelling microscope has 50 divisions which co...

    Text Solution

    |

  2. If the unit of force is 100N, unit of length is 10m and unit of time i...

    Text Solution

    |

  3. State the principle of homogeneity. Test the dimensional homogeneity o...

    Text Solution

    |

  4. In Vander Waal's gas equation (P + (2)/(V^(2))) (V-b) = RT. Determine ...

    Text Solution

    |

  5. Magnitude of force experienced by an object moving with speed v is giv...

    Text Solution

    |

  6. A book with printing error contains four different formulae for displa...

    Text Solution

    |

  7. Determine the number of light years in one metre.

    Text Solution

    |

  8. The mass of a box measured by a grocer's balance is 2.3 kg. Two gold p...

    Text Solution

    |

  9. 5.74 g of a substance occupies 1.2 cm^(3) Express its density to corre...

    Text Solution

    |

  10. If displacement of a body s = (200 pm 5) m and time taken by it t = (2...

    Text Solution

    |

  11. If the error in measurement of mass of a body be 3% and in the measure...

    Text Solution

    |

  12. The length of a rod as measured in an experiment was found to be 2.48 ...

    Text Solution

    |

  13. A physical quantity is measured as Q = (2.1 pm 0.5) units. Calculate t...

    Text Solution

    |

  14. Jupiter is at a distance of 824.7 million km from the Earth. Its angul...

    Text Solution

    |

  15. A laser light beamed at the Moon takes 2.56s and to return after refle...

    Text Solution

    |

  16. Convert 3 ms^(-2) "to km" h^(-2) (ii) G = 6.67 xx 10^(-11) N m^(2) ...

    Text Solution

    |

  17. A calorie is a unit of heat or energy and it equals 4.2 J where 1J = 1...

    Text Solution

    |

  18. The escape velocity v of a body depends upon (i) the acceleration due ...

    Text Solution

    |

  19. The frequency of vibration of a string depends on, (i) tension in the ...

    Text Solution

    |

  20. One mole of an ideal gas at STP occupies 22.4 L. What is the ratio of ...

    Text Solution

    |