1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nydimaria [60]
3 years ago
6

A 3.53-g lead bullet traveling at 428 m/s strikes a target, converting its kinetic energy into thermal energy. Its initial tempe

rature is 40.0°C. The specific heat is 128 J/(kg · °C), latent heat of fusion is 24.5 kJ/kg, and the melting point of lead is 327°C.
(a) Find the available kinetic energy of the bullet.
J
Physics
1 answer:
Taya2010 [7]3 years ago
3 0

Complete question:

A 3.53-g lead bullet traveling at 428 m/s strikes a target, converting its kinetic energy into thermal energy. Its initial temperature is 40.0°C. The specific heat is 128 J/(kg · °C), latent heat of fusion is 24.5 kJ/kg, and the melting point of lead is 327°C.

(a) Find the available kinetic energy of the bullet. J

(b) Find the heat required to melt the bullet. J

Answer:

Part (a) the available kinetic energy of the bullet is 323.32 J

Part (b) the heat required to melt the bullet is 216.17 J

Explanation:

Given;

mass of the bullet = 3.53 g = 0.00353 kg

velocity of the bullet = 428 m/s

initial temperature of the bullet = 40.0°C

final temperature of the bullet =  327°C

specific heat capacity, c= 128 J/(kg · °C)

latent heat of fusion, Hf  = 24.5 kJ/kg

Part (a) the available kinetic energy of the bullet. J

KE = ¹/₂ × mv²

KE = ¹/₂ × 0.00353 × 428²

     = 323.32 J

Part (b) the heat required to melt the bullet. J

This is the thermal energy required to increase the temperature of the bullet and the heat energy required to melt the bullet.

Quantity of heat required to raise the temperature of the bullet:

Q = mcΔT

   = 0.00353 × 128 × (327-40)

   = 0.00353 × 128 × 287

   = 129.68 J

Quantity of heat required to melt the bullet:

Q = mH_f

Q = 0.00353 × 24500

   = 86.49 J

TOTAL energy required to melt the bullet = 129.68 J + 86.49 J

                                                                      = 216.17 J

You might be interested in
What are non-clastic?
igor_vitrenko [27]
Non clastic sedimentary rocks from chemical reactions, chiefly in the ocean. Nonclastic and clastic sedimentary rocks are the only members of the rock family that contain fossils as well as indicators of the climate that was present when the rock was formed.
8 0
3 years ago
Which officeholders are elected by the electoral college
NikAS [45]

Answer:Electoral Vote

Explanation:i did it before

4 0
3 years ago
Which shows the order of mechanical advantage from least to greatest?
Eduardwww [97]
What do you mean? I'm confused... You need to put the rest  of the question

3 0
3 years ago
Why are bells made up of metals instead of wood?
Morgarella [4.7K]
The main reason why bells are made up of metals instead of wood is because metal is much more dense than wood, meaning that it resonates at much stronger frequencies. Wood has far too much air in it to make loud noises when struck.
6 0
3 years ago
What was your electric potential relative to a metal pipe if a spark jumped 1.1 cm through dry air from your finger to the pipe?
romanna [79]
The electric field is given by volts/distance: E= \frac{V}{d}.  The breakdown voltage of dry air is about 3x10^6V/m.  So solving for V we get
V=Ed
or V=(3e6V/m)(0.011m)=33,000V
6 0
3 years ago
Read 2 more answers
Other questions:
  • Match the measurement with the proper Sl unit<br> Acceleration:<br> Velocity<br> Distance:
    8·2 answers
  • The sun is important to is because of the heat it provides. The sun is just one of ________ of stars in the universe.
    5·1 answer
  • certification programs are available at all of the following except A. online schools B. vocational school C. community colleges
    8·2 answers
  • TheStability of atomic nuclei seems to be related to the ratio of what
    9·1 answer
  • The length of second, s pendulum at a place where gravitational acceleration ]g] is 9.8 m/s
    8·1 answer
  • If a car is traveling at an average speed of 60 kilometers per hour, how long does it take to travel 12 kilometers?
    12·1 answer
  • The source of all magnetism is. A. tiny pieces of iron. B. tiny domains of aligned atoms. C. Ferromagnetic materials. D. moving
    6·2 answers
  • The dipole moment of HI is 0.42D. What is the dipole moment of HI in C⋅m?
    8·1 answer
  • You are sitting 3 m away from you friend who is watching a cartoon on his phone. How will the sound itensity change if your frie
    6·1 answer
  • How will you separate mixture of metal and nonmetal objects​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!