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Inga [223]
3 years ago
15

The mc002-1.jpgHrxn of formation of carbon dioxide is negative. Which statement is true?

Physics
1 answer:
s344n2d4d5 [400]3 years ago
3 0

When the formation of carbon dioxide is negative, it means that it releases heat to the surroundings. When it releases heat to the surroundings, the reaction is exothermic.

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A pressure of 400 Pa is applied to an area of 2.5 m2.What force applies this pressure?
Irina-Kira [14]
F = 400 Pa x 2.5 m2
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4 0
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The wire of the potentiometer has resistance 4 ohms and length 1 m. It is connected to a cell of e.m.f. 2 volts and internal res
Sever21 [200]

Answer:

Potential gradient = 1.6 v/m  

E.M.F. = potential gradient × balancing length 1.2 = 1.6 × l

l=1.2\1.6

=3\4

3\4=0.75m

convert m into cm 0.75x10

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ans=75 cm

Explanation:

5 0
3 years ago
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liberstina [14]

Answer:

I would say contact forces

Explanation:

This questions is kind of missing some info but I do know that contact forces need to be either pushed or pulled for a force to happen.

Hope this helped

4 0
2 years ago
An action force is 50 N to the left. The reaction force must be:
igomit [66]
<h2>According to Newton's Third Law:</h2><h3>"For every action,there exists an equal and opposite reaction"</h3>

<h3>So an action force of 50 N to the left, results in a 50 N reaction force to the right.</h3>

<h2>Option A</h2>
7 0
2 years ago
Read 2 more answers
Write a small paragraph on how to determine the speed of sound using the time of flight method.
Makovka662 [10]

Answer:

time of flight of a pulse, and these most often

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. Loren Winters

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detection system6

.

Explanation:

6 0
3 years ago
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