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In-s [12.5K]
3 years ago
6

A student has a thin copper beaker containing 100 g of a pure metal in the solid state. The metal is at 215°C, its exact melting

temperature. If the student lights a Bunsen burner and holds it for a fraction of a second under the beaker, what will happen to the metal?
Physics
1 answer:
soldier1979 [14.2K]3 years ago
6 0

Answer:

The metal will melt but their will be no change in temperature.

Explanation:

The metal is at its melting temperature which means it is still in solid phase but have to cross the enthalpy of its condensation at this same temperature to convert into liquid phase.

<u>On supplying heat, the metal's temperature will not change as the heat will be required as enthalpy of condensation to melt the solid to liquid at the melting temperature.</u>

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Nadusha1986 [10]

For the First answer, It would be "A"

The for the next one the answer is "C"

I hope this helps. :)

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2 years ago
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3. A car has a mass of 2.50 x 10^3 kg. If the force acting on the car is 7.65 x 10^3 N to the
const2013 [10]

Answer:

3.06m/s² to the east

Explanation:

Given parameters:

Mass of car = 2.5 x 10³kg

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Unknown:

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Solution:

From Newton's second law of motion:

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6 0
3 years ago
Ms. Sparkle bought 12 cans of diet soda. Each can
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6 0
2 years ago
PLS HELP DUE AT 10 PM
Rina8888 [55]
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6 0
3 years ago
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If you put 120 volts of electricity through a pickle, the pickle will smoke and start glowing orange-yellow. The light is emitte
Alona [7]

Answer:

2.11eV

Explanation:

We know that speed of light is it's wavelength times frequency.

\therefore f=v/\lambda\\=(3\times10^8m/s)/(589mm\times1m/1\times 10^9nm)\\=5.09\times10^1^4s^-1 \ or \ 5.09\times10^1^4Hz

Planck's constant is 6.626\times 10^3^4Js

The energy gap is calculated by multyplying the light's frequency by planck's constant:

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Hence, the energy gap is 2.11eV

4 0
3 years ago
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