A hunter fired a metallic bullet of mass...

A hunter fired a metallic bullet of mass 'm' kg from a gun towards an obstacle and it just melts when it is stopped by the obstacle. The initial temperature of the bullet is 300 K . If `1/4 th` of heat is absorbed by the obstacle, then the minimum velocity of the bullet is Melting point of bullet=600 K Specific heat of bullet =`0.03 cal g^-1^@C^-1`, Latent heat of fusion of bullet= `6 cal g^-1`]

`410 ms^-1`

`260 ms^-1`

`460 ms^-1`

`310 ms^-1`

Text Solution

Verified by Experts

Topper's Solved these Questions

Sound
TARGET PUBLICATION|Exercise Exercise|248 Videos

Similar Questions

Explore conceptually related problems

A bullet leaves the rifle of mass one kg and rifle recoils thereby with velocity 30 cm/s. If the mass of the bullet is 3 g, the velocity of the bullet is

50 g of copper is heated to increase its temperature by 10^@C . If the same quantity of heat is given to 10 g water, the rise in its temperature is Specific heat of copper = 420 joule-kg^-1^@ C^-1 , Specific heat of water = 4200 joule-kg^-1^@ C^-1

Calculate the amount of heat absorbed by 100 g of ice to change into water of 30^@ C.(Latent heat of fusion of ice is 80 cal//g )

A bullet of mass 10 g is fired with a velocity of 100 m/s from a rifle of mass 2.5 kg, the recoil velocity of the rifle is

Steam at 100^@C is passed into 20 g of water at 10^@C When water acquires a temperature of 80^@C , the mass of water present will be Take specific heat of water= 1 cal g^-1^@ C^-1 and latent heat of steam = 540 cal g^-1 )

Calculate the heat absorbed if the initial temperature of 50g ice is 0^@C to change into water of the same temperature (Latent heat of fusion of ice is 80 cal//g )

When a bullet fired from a gun strikes the target, the target becomes hot.

When a bullet is fired from the gun, the gun moves in backward direction. This motion is called as

A bullet of mass 40 g moving with a speed of 90 m/s enters a heavy wooden, block and is stopped after a distance of 60 cm. The average resistive force exerted by the block on the bullet is

Practice problems : When 15 cal of heat is supplied to a gold coin of mass 5 g , what will be the rise in temperature of the coin ? ( specific heat of gold = 0.03 cal/g ⁰C)

TARGET PUBLICATION-Thermal Properties of Matter-Exercise

The color of star depends upon its
Text Solution
|
A pendulum clock loses 12 s a day if the temperature is 40^@C and gain...
Text Solution
|
A hunter fired a metallic bullet of mass 'm' kg from a gun towards an ...
Text Solution
|
A piece of ice falls from a height h so that it melts completely. Only...
Text Solution
|
A uniform steel rod of 2.5 mm^2 cross sectional area is heated through...
Text Solution
|
An external pressure P is applied on a cube at 0^@C so that it is equa...
Text Solution
|
A deep rectangular pond of surface area A, containing water (density =...
Text Solution
|
Two identical blocks of ice move in opposite directions with equal spe...
Text Solution
|
A 15kW drilling machine is used to drill a bore in a small aluminium b...
Text Solution
|
When a body has the same temperature as that of its surroundings
Text Solution
|
A body takes 8 min to cool from 60^@ C to 50^@C. If the temperature of...
Text Solution
|
How much steam at 100^@C will just melt 1600 g of ice at -8^@C? (Spec...
Text Solution
|
Assertion: A brass disc is just fitted in a hole in steel plate. The s...
Text Solution
|
The coefficient of thermal conductivity of copper is nine times that o...
Text Solution
|
Two beakers A and B are filled to the brim with water a 4^@C. When A i...
Text Solution
|
The length of a wire is lA when the tension in it is TA and of another...
Text Solution
|
A flask of volume 4000 cc is completely filled with mercury at 0^@C. T...
Text Solution
|
A balloon contains 600 m^3 of helium a 37^@C and atmospheric pressure....
Text Solution
|
The two on pieces A and B appear red and yellow respectively when plac...
Text Solution
|
Expansion during heating
Text Solution
|