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
Veronika [31]
2 years ago
8

How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C?

Physics
1 answer:
Ne4ueva [31]2 years ago
6 0

As we know that in order to melt the copper we need to take the temperature of copper to its melting point

So here heat required to raise the temperature of copper is given as

Q = ms\Delta T

We know that

melting temperature of copper = 1085 degree C

Specific heat capacity of copper = 385 J/kg C

now we have

Q = 3(385)(1085 - 83)

Q = 1157310 J

Q = 1157.3 kJ

now in order to melt the copper we know the heat required is

Q = mL

here we know that

L = 205 kJ/kg

now from above formula

Q = 3(205) kJ

Q = 615 kJ

now total heat required will be

Q = 1157.3 kJ + 615 kJ

Q = 1772.3 kJ

As we know that

1 Cal = 4.18 kJ

now we have

Q = \frac{1772.3}{4.18} = 430 KCal

You might be interested in
The first step of the scientific method is
Ray Of Light [21]

Answer: make objective observations.

Explanation:

3 0
2 years ago
Read 2 more answers
Lakes
Nataliya [291]
I think is between A&B
I think I would answer B
6 0
3 years ago
What is the power of a circuit with voltage 12 V and current 8.0<br> A?
SVEN [57.7K]

Answer:96 W

Explanation:

3 0
3 years ago
Ian and Dane are twins. Ian loves art and music and work after school. Dane loves sports and would do anything to avoid having a
Brilliant_brown [7]

Answer:

Explanation:

Pliability

5 0
3 years ago
Determine the amount of work done when a crane lifts a 100-N block form 2m above the ground to 6m above the ground
Dima020 [189]

Data given:

F=100N

Δx=6m-2m=4m

A=?

Formula needed:

A=F×s

Solution:

A=100N×4m

A=400J

4 0
3 years ago
Other questions:
  • Rain falls vertically downward with the velocity of 3.3 m/s. a boy moves at a speed of 5 m/s east in a bicycle with an umbrella.
    5·1 answer
  • Collapse question part Part 4 (d) What is the unit vector in the direction of the spacecraft's velocity? (Express your answer in
    6·1 answer
  • The images that come to mind when we think of a place, any place, like Tucson, Arizona or Damascus, Syria are known as ourA) cog
    12·1 answer
  • Gravity has traditionally been defined as a force of attraction between things that have what
    12·1 answer
  • A wave is incident on the surface of a mirror at an angle of 41° with the normal. What can you say about its angle of reflection
    6·2 answers
  • When four people with a combined mass of 310 kg sit down in a 2000-kg car, they find that their weight compresses the springs an
    5·1 answer
  • In a sound wave, the wavelength is equivalent to the distance from a region of high pressure to the region of mean
    12·1 answer
  • What is the relation between centre of gravity and stability
    10·1 answer
  • Help please (20 pts) I think it's C
    10·1 answer
  • Anne has a sample of a substance. Its volume is 20 cm3, and its mass is 100 grams. What is the sample’s density? The sample’
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!