2 years ago

Please help with these questions

Physics

1 answer:

lord [1]2 years ago

8 0

When do you gotta turn it in?

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A copper ball and an aluminum ball of mass 150 g each are heated to 100°C and then cooled to a temperature of 20°C. The heat los

nevsk [136]

The specific heat of aluminum is actually simply a diversion. Because we can directly compute for the specific heat of copper using the formula:

ΔH = m C ΔT

where ΔH is change in enthalpy or heat lost, m is mass, C is specific heat and ΔT is change in temp

4,600 J = 150 g * C * (100 °C - 20°C)

C = 0.38 J/g°C

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3 years ago

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What are the waves called with a frequency of 20,000hz?

Mars2501 [29]

Fréquence of 20,000hz is called ULTRASOUND

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3 years ago

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PLEASE HELP!!!!!

svet-max [94.6K]

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erdgase una vevzun accavo laóen mrzohaiec l ehorizon t et eptasua

4 0

3 years ago

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Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring consta

Zanzabum

Answer:

$k_2=920\ N/m$

Explanation:

Given that,

The spring constant of spring 1, $k_1=230\ N/m$

The motion of the object on spring 1 has twice the amplitude as the motion of the object on spring 2, $A_1=2A_2$

As the magnitude of the maximum velocity is the same in each case, it means the maximum kinetic energy is same in each case. In other words, the total energy is same.

$\dfrac{1}{2}k_1A_1^2=\dfrac{1}{2}k_2A_2^2$

$k_1A_1^2=k_2A_2^2$

$k_1(2A_2)^2=k_2A_2^2$

$k_2=920\ N/m$

So, the spring constant of spring 2 is 920 N/m. Hence, this is the required solution.

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3 years ago

How does the kinetic energy of the particles in a hot cup of coffee compare to the kinetic energy of the particles in ice cream?

trasher [3.6K]

Answer:

it has more molecules than the burning match, which equals MORE total kinetic energy.

Explanation:

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4 years ago

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