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
Doubtnut Promotions Banner Mobile Dark
|

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 lead bullet hits a target at a velocity of 300 m cdot s^(-1) . If it stops completely on hitting, determine the increase in temperature of the bullet. Assume that 50% of the heat produced is retained by the bullet. Specific heat of lead = 0.03 cal cdot g^(-1) cdot^(@)C^(-1) .

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 ?

Knowledge Check

  • 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
    `0.035^(@)C`
    B
    `0.07^(@)C`
    C
    `0.35^(@)C`
    D
    `0.7^(@)C`

    • Similar Questions

    Explore conceptually related problems

    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

    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).

    Home
    Profile