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algol13
3 years ago
9

write a short paragraph that explains why the earth would not be considered a closed system and be sure to include evidence or e

xamples for your answer.Also, suggest a system that would be considered the ultimate closed system.
Physics
2 answers:
Tomtit [17]3 years ago
8 0
The earth would not be considered a closed system. A closed system is a place or a habitat that is self sustaining and does not require any outside help or force. A closed system requires air food water or anything that any organism inside the system would need the earth is not a closed system because humans can easily leave or enter earth via a space ship as well as asteroids crash landing inside earth would be considered as entering. A biosphere is a ultimate closed system (A biosphere is a self sustaining sphere with plants to make air with any other organisms to create carbon dioxide *look up biospheres for more info*)
kati45 [8]3 years ago
6 0

Earth is considered a closed system because only energy, not matter, is exchanged. A closed system like Earth can be easily represented by a sealed jar. When the lid is sealed, matter like air or water can neither enter nor exit the jar. If you placed that same jar in a 100-degree oven, the air inside the jar would eventually increase in temperature to 100 degrees, representing an exchange of energy known as heat.  

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Two quantities that have the same dimension but have a different physical concepts.
vitfil [10]

Answer:

In general, if the dimensions are same, the quantities do represent the same physical content. Like work and energy have the same dimensions and represent inter-convertible quantity. ... These two quantities represent the same quantity - same meaning and content.

Explanation: i hope this helped.

7 0
4 years ago
Consider two copper wires. one has twice the length and twice the cross-sectional area of the other. how do the resistances of t
Anestetic [448]

Answer:

R = ρ L / A     where R is the resistance and ρ the resistivity:

R2 / R1 = (L2 / A2) / (L1 / A1) = L2 * A1 / (L1 * A2)

R2 / R1 =  (2 L * A) / (L * 2 A) = 1

Their resistances should be the same.

5 0
2 years ago
a train travels 81 kilometers in 2 hours and then 88 kilometers in 2 hours what is its average speed​
Blababa [14]

Average speed = total distance / total time

= (81 + 88) / (2 + 2)

= 169/4

= 42.25 kilometers/hour

Let me know if you have any questions.

4 0
3 years ago
: In heavy rushIn heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5
zhuklara [117]
Guessing you want the average speed. We can multiple each speed by the time we spent going that speed, and them all together and then divide by the total time we spent in traffic to get the average speed. We spent a total of 7.5 minutes in traffic, so average speed  = (12*1.5+0*3.5+15*2.5)/7.5 = 7.4 m/s
8 0
3 years ago
You are the design engineer in charge of testing the crashworthiness of new automobile models. Cars are tested by smashing them
BaLLatris [955]

Answer:

average force  is 138900 N

Explanation:

given data

speed = 50 km/h = 13.89 m/s

mass = 1500 kg

time = 0.15 s

to find out

average force

solution

we know initial velocity of car is positive

we will apply here equation to find force that is

Force x change in time that is equal to  mass x change in speed    ................1

so put here all value of mass, time and velocity in equation 1

Force x 0.15 =  1500 x ( -13.89)

force = 138900 N

so average force  is 138900 N

3 0
3 years ago
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