A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a...

Question

Question

A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a...

A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a steel plate. If the bullet melts on impact, what is the minimum speed it must have?

science physics

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

given
m = 9 g = 9*10^-3 kg

we know, specific heat of lead, C = 128 J/(kg C)

latent of melting of lead, L = 23*10^3 J/kg

we know, melting point of leat, T = 327.5 C

heat required to melt the lead bullet, Q = m*C*(327.5 - 110) + m*L

= 9*10^-3*128*(327.5 - 110) + 9*10^-3*23*10^3

= 457.6 J

so, reuired kinetic energy of the bullet, KE = 457.6 J

use, (1/2)*m*v^2 = KE

==> v = sqrt(2*KE/m)

= sqrt(2*457.6/(9*10^-3))

= 319 m/s <<<<<<<<<<<<<<<---------------------Answer

Add a comment

Answer 2

Similar Homework Help Questions

A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a...

A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a steel plate. If the bullet melts on impact, what is the minimum speed it must have?
A 30.0-g lead bullet leaves a rifle at a temperature of 94.0 degrees celsius and hits...

A 30.0-g lead bullet leaves a rifle at a temperature of 94.0 degrees celsius and hits a steel plate. If the buller melts, what is the minimun speed it must have? _______m/s
A 50.0-gram lead bullet hits a steel plate, both initially at 25 °C. The bullet melts...

A 50.0-gram lead bullet hits a steel plate, both initially at 25 °C. The bullet melts and splatters on impact. Assuming that the bullet receives 88% of its kinetic energy as heat energy, at what minimum speed must it be traveling to melt on impact? (The melting temperature of Lead is 327°C)

A 90.0-gram lead bullet hits a steel plate, both initially at 29 °C. The bullet melts...

A 90.0-gram lead bullet hits a steel plate, both initially at 29 °C. The bullet melts and splatters on impact. Assuming that the bullet receives 76% of its kinetic energy as heat energy, at what minimum speed must it be traveling to melt on impact? (The melting temperature of Lead is 327°C)
A 90.0-gram lead bullet hits a steel plate, both initially at 24 °C. The bullet melts...

A 90.0-gram lead bullet hits a steel plate, both initially at 24 °C. The bullet melts and splatters on impact. Assuming that the bullet receives 74% of its kinetic energy as heat energy, at what minimum speed must it be traveling to melt on impact? (The melting temperature of Lead is 327°C) _____ m/s
. A rifle that weights 1.5 kg fires a 6 g bullet. The bullet leaves the...

. A rifle that weights 1.5 kg fires a 6 g bullet. The bullet leaves the rifle traveling at 700 m/s. What is the recoil speed of the rifle?

A 4.0-g bullet leaves the muzzle of a rifle with a speed of 328 m/s. What...

A 4.0-g bullet leaves the muzzle of a rifle with a speed of 328 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.75-m-long barrel of the rifle? A 4.0-g bullet leaves the muzzle of a rifle with a speed of 328 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.75-m-long barrel of the rifle? 765 Your response differs from the correct answer by more...
A 12g bullet is fired from a 3.09 kg rifle. After the bullet leaves the rifle...

A 12g bullet is fired from a 3.09 kg rifle. After the bullet leaves the rifle it moves at a speed of 308 m/s. What is the magnitude of the impulse imparted on the rifle?
A 5.00 gram bullet leaves the barrel of a horizontally aimed rifle located 1.00 [m] above...

A 5.00 gram bullet leaves the barrel of a horizontally aimed rifle located 1.00 [m] above the ground with a speed of 250. [m/s]. (a) What is the force on the bullet (assumed constant) as it travels down the 0.500 m barrel of the rifle? (b) How long after leaving the barrel of the rifle is it before the bullet hits the ground? (c) How far does the bullet travel before hitting the ground? Assume air resistance can be neglected.

If a bullet leaves the muzzle of a rifle with a speed of 600m/s, and the barrel ofthe rifle is...

If a bullet leaves the muzzle of a rifle with a speed of 600m/s, and the barrel ofthe rifle is 0.9m long, what is the acceleration of the bullet while in the barrel?

A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a...

Homework Answers

Add Answer to:
A 9 g lead bullet leaves the rifle at a temperature of 110°C and hits a...

Post as a guest

Earn Coins