Home
Class 11
PHYSICS
When a bullet of 6g mass hits a target a...

When a bullet of 6g mass hits a target at a speed of `400m cdot s^(-1)`, 70% of its energy is converted into heat. The value of heat generated is

A

336 cal

B

80 cal

C

`3.36 xx 10^(5) cal`

D

80000 cal

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • FIRST AND SECOND LAW OF THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise Exercise - Very Short Answer Type Questions (Mark 1)|53 Videos

  • FIRST AND SECOND LAW OF THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise Exercise - Short Answer Type Questions-I (Marks 2)|5 Videos

  • FIRST AND SECOND LAW OF THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise Higher Order Thinking Skill (HOTS) Questions|35 Videos

  • EXPANSION OF SOLIDS AND LIQUIDS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|2 Videos

  • FRICTION

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|7 Videos

Similar Questions

Explore conceptually related problems

A 5kg rifle fires a 5g bullet with a speed of 500 m*s^(-1) . What kinetic energy is acquired (ii) by the the rifle ?

Water drops from a height of 50 m in a waterfall. Find out the rise in temperature of water, if 75% of its energy is converted into heat and absorbed by water. (J = 4.2 xx 10^(7) erg cdot cal^(-1) , g = 9.8 m cdot s^(-2))

A bullet of mass 6 g is fired with a velocity of 500 m cdot s^(-1) from a gun of mass 4 kg. Find the recoil velocity of gun.

A 5kg rifle fires a 5g bullet with a speed of 500 m*s^(-1) . What kinetic energy is acquired (i) by the bullet and

Water drops from a height of 40 m in a waterfall. if 75% of its energy is converted into heat and absorbed by the water, the rise in temperature of the water will be

A lead bullet stopped on hitting an iron plate at a velocity of 300 m cdot s^(-1) . Find out the rise in temperature of the bullet, if the heat evolved is shared equally between the bullet and the plate. Given, J = 4 cdot 2 xx 10^(7) erg cdot cal^(-1) , specific heat of lead = 0.03 cal cdot g^(-1) cdot^(@)C^(-1) .

A bullet of mass 80 g strikes a target at 100 cm*s^(-1) . After penetration, its velocity reduces to 50 cm*s^(-1) . How much of its kinetic energy is spent ?

A body of mass 1 kg falls to the ground from a height of 1km. If the entire amount of energy is converted into heat , find out the amount of heat produced. (J = 4 cdot 1 xx 10^(7) erg cdot cal^(-1)) .

On a planet X, a man throws a 500 g mass with a speed of 20 m cdot s^(-1) and catches it as it comes down 20 second later. Find the weight of the mass (in unit).

CHHAYA PUBLICATION-FIRST AND SECOND LAW OF THERMODYNAMICS-Exercise - Multiple Choice Questions (Mark 1)
  1. When a bullet of 6g mass hits a target at a speed of 400m cdot s^(-1),...

    Text Solution

    |

  2. Water drops from a height of 40 m in a waterfall. if 75% of its energy...

    Text Solution

    |

  3. The amount of work done to convert 1 g ice at 0^(@)C into steam at 100...

    Text Solution

    |

  4. 169 J energy is required to transform 1g (1cm^(3)) of water into steam...

    Text Solution

    |

  5. A man of mass 90 kg gains 10^(5) cal of heat from his food intake. If ...

    Text Solution

    |

  6. Which of the following quantities does not indicate any thermodynamic ...

    Text Solution

    |

  7. The internal energy of a substance actually means

    Text Solution

    |

  8. If the average kinetic energy of the molecules of a certain mass of a ...

    Text Solution

    |

  9. If the volume of a gas of a certain mass changes from 1 L to 0.5 L at ...

    Text Solution

    |

  10. The internal energy of a system is U(1). In a process, work done by th...

    Text Solution

    |

  11. The work done by an ideal gas at constant temperature is 10 J. the amo...

    Text Solution

    |

  12. The work done by an ideal gas at constant pressure is 10 J. The amount...

    Text Solution

    |

  13. If the internal energy U and the work W are expressed in unit of J and...

    Text Solution

    |

  14. C(v) = 5/2 R, for 1 mol of any diatomic ideal gas. The value of the ra...

    Text Solution

    |

  15. If R = 2 cal cdot mol^(-1) cdot^(@)C^(-1) and hydrogen is assumed to b...

    Text Solution

    |

  16. Work done becomes zero

    Text Solution

    |

  17. The change in internal energy of an ideal gas becomes zero

    Text Solution

    |

  18. The process in which changes in pressure, volume and temperature occur...

    Text Solution

    |

  19. It is observed by comparing the specific heat of all solid, liquid and...

    Text Solution

    |

  20. In an adiabatic expansion, the change in internal energy of 10 mol of ...

    Text Solution

    |