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Irina-Kira [14]

3 years ago

14

Think about the way your body works when you eat an ice cream cone. Provide an explanation of how organs are working together as

a system to help you eat the cone. Describe one organ system and how its parts combine to get your body nutrition from the food.
PLZ HELP

1 answer:

AlexFokin [52]3 years ago

8 0

Answer:

Explanation:

BAHAHAHAH karely omg HAHAHA un idke

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When water freezes, it expands. what does this say about the density of ice compared with the density of water?

masya89 [10]

<span>When water freezes to form ice, its volume expands. However, we know from conservation of mass that the mass of the ice is the same as the mass of the water. Since density is defined fundamentally as mass / volume, and we have an expanding volume at a constant mass, the denominator of the equation grows, and thus the density of ice is lower than that of liquid water.</span>

4 0

4 years ago

When an aluminum bar is connected between a hot reservoir at 860 K and a cold reservoir at 348 K, 2.40 kJ of energy is transferr

Natalija [7]

Answer:

a) $\Delta S_{in} = 2.791\,\frac{J}{K}$ , b) $\Delta S_{out} = 6.897\,\frac{J}{K}$ , c) $S_{gen} = 4.106\,\frac{J}{K}$ , d) Due to irreversibilities due to temperature differences.

Explanation:

a) The change in entropy of the hot reservoir is:

$\Delta S_{in} = \frac{2400\,J}{860\,K}$

$\Delta S_{in} = 2.791\,\frac{J}{K}$

b) The change in entropy of the cold reservoir is:

$\Delta S_{out} = \frac{2400\,J}{348\,K}$

$\Delta S_{out} = 6.897\,\frac{J}{K}$

c) The total change in entropy of the Universe is modelled after the Second Law of Thermodynamics. Let assume that process is steady:

$\Delta S_{in} - \Delta S_{out} + S_{gen} = 0$

$S_{gen} = \Delta S_{out} - \Delta S_{in}$

$S_{gen} = 6.897\,\frac{J}{K} - 2.791\,\frac{J}{K}$

$S_{gen} = 4.106\,\frac{J}{K}$

d) Since irreversibilities create entropy as process goes by. The main source of irreversibilities is the existence of temperature differences.

6 0

3 years ago

There is no question my bad

Llana [10]

Answer:

It's cool dude cause more points for me

8 0

3 years ago

Pachacha [2.7K]

Answer: The answer would be 10

Explanation:

7 0

3 years ago

Determine the kinetic energy of 650 kg roller coaster car that is moving with a speed of 20.0 miles per second?

mestny [16]

Answer:Ek=673.109 kJ

Explanation:

Use equation for Kinetic energy: Ek=m*V²/2

m=650 kg (mass of roller coaster)

V=20.0Miles/s=20.0*1.609m/s=32.18m/s

Ek=m*V²/2

Ek=650kg*(32.18m/s)²

Ek=(650kg*1053.55m²/s²)/2

Ek=673 108.8 J

Ek=673.109 kJ

4 0

3 years ago