What is the energy of a 4 kg apple that is sitting on a 2 m high tree branch (use ham)

Physics

1 answer:

ziro4ka [17]3 years ago

4 0

Answer:

Explanation:

The energy is potential energy, mgh.

m = mass in kg

g = acceleration due to gravity (alot of talk about whether g is 9.8, 9.81 or 10)

h = height above your zero line (alot of times distance to the ground)

PE = mgh = 4 * 10 * 2 = 80 Nm or 80 Joules

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A toy helium balloon is initially at a temperature of T = 24o C. Its initial volume is 0.0042 m3 (It is a 10 cm radius sphere).

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Answer:

$T_{f} = 335.780\,K\,(62.630\,^{\textdegree}C)$

Explanation:

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$P\cdot V = n\cdot R_{u}\cdot T$

Where:

$P$ - Pressure, in kPa.

$V$ - Volume, in m³.

$n$ - Quantity of moles, in kmol.

$R_{u}$ - Ideal gas constant, in $\frac{kPa\cdot m^{3}}{kmol\cdot K}$ .

$T$ - Temperature, in K.

Since there is no changes in pressure or the quantity of moles, the following relationship between initial and final volumes and temperatures is built:

$\frac{V_{o}}{T_{o}} = \frac{V_{f}}{T_{f}}$