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olya-2409 [2.1K]
3 years ago
11

Please help i really need it. this is my physic exam

Physics
2 answers:
erastova [34]3 years ago
7 0
Correct answer is C.
Harlamova29_29 [7]3 years ago
3 0

Answer:

bout=14.4V , b)R2=80

am i right

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Savatey [412]

Answer:

Explanation: the  temperature range is at 1,400

8 0
2 years ago
Plz help I will mark brainiest help send answers
Elden [556K]

Answer:

D

Explanation:

3 0
3 years ago
A soccer player pumps air into a soccer ball until no more air can be pushed inside. Describe the air inside the soccer ball com
inessss [21]

Answer:

the filling stops when the pressure of the pump equals the pressure of the interior air plus the pressure of the walls.

Explanation:

This exercise asks to describe the inflation situation of a spherical fultball.

Initially the balloon is deflated, therefore the internal pressure is equal to the pressure of the air outside, atmospheric pressure, when it begins to inflate the balloon with a pump this creates a pressure in the inlet valve and as it is greater than the pressure inside, the air enters it, this is repeated in each filling cycle, manual pump.

When the ball is full we have two forces, the one created by the external walls and the one aired by the pressure of the pump, these forces are directed towards the inside, but the air molecules exert a pressure towards the outside, which translates into a force. When these two forces are equal, the pump is no longer able to continue introducing air into the balloon.

Consequently the filling stops when the pressure of the pump equals the pressure of the interior air plus the pressure of the walls.

4 0
3 years ago
Which of the following processes are Exothermic? I. Melting II. Sublimation III. Vaporization IV. Condensation
mariarad [96]

Answer: condensation process is exothermic. The correct option is IV.

Explanation: Exothermic reaction is a chemical reaction in which heat is released to the surrounding environment.

condensation is defined as a process by which a medium changes from gaseous phase into liquid phase. Using water molecules to illustrate, to transform water molecules to gaseous phase it requires the heat of vaporization to be overcomed. This same hear of vaporization needs to be given off when changing back to liquid phase.

7 0
3 years ago
What does the speed of sound depend on?
mr Goodwill [35]
I believe it's 'A'. Hopefully this helps!~ :)
6 0
3 years ago
Read 2 more answers
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