Physics, 08.07.2019 21:00 davienwatson8

How much energy is needed to heat and melt 3.0 kg of copper initially at 83°c? 450 kcal 430 kcal 280 kcal 130 kcal

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Hi Brainiac! Thanks for asking a question here on in the physics category.

We need to figure out the melting point of the energy in order to see how much energy is needed.

✦ Find the melting point of the copper
✦ Multiply the mass by the heat and temperature of the melting point.
✦ Figure out the heat fusion of the copper.
✦ Add together the solution.

Q = mcΔT = (3.0kg)(387J/kg * C°)
(1084 C° - 83 C°)
= 1.1 x 10^6J
= 280 kcal

Letter C

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or post another question and send the link to me. -UnicornFudge aka Nadia

Answer from: shakebays

The energy required would be 280 kcal

Explanation:

We can find out the required amount of energy with the help of the equation

Q = mcΔT

where m shows the mass

c shows the specific heat

and ΔT shows the heat change

So putting the values in the equation

Energy to reach melting point = mass x specific heat x change in temperature from 83 C to melting point.

=(3.0kg)(387J/kg•°C)(1084°C - 83°C)

= 1.1 x 10^6J

280 Kcal

Answer from: Quest

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

Answer from: Quest

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

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How much energy is needed to heat and melt 3.0 kg of copper initially at 83°c? 450 kcal 430 kcal 28...

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