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Lubov Fominskaja [6]
3 years ago
13

For the following equation answer the following:

Physics
1 answer:
sergij07 [2.7K]3 years ago
8 0

Answer:

4Al + 3O2 + heat ------> 2Al2O3

Explanation:

It is endothermic reaction.

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As liquid water freezes, what happens to its thermal energy?
Shtirlitz [24]

Answer:

I believe it is C

Explanation:

When the water freezes the kinetic energy decreases because it is staying in place instead of moving around, which also causes thermal energy to decrease.

4 0
3 years ago
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4 years ago
A 755 N diver drops from a board 10.0 m above the water's surface. Find
MrRa [10]

Answer:

F = 755 N and h = 10.0 m and a = 9.8 m/s 2 and m=? and v = ?

5 0
3 years ago
CAN SOMEONE PLEASE HELP ME WITH MY PHYSICS QUESTIONS? I NEED CORRECT ANSWERS ONLY!
BARSIC [14]
<h2>Right answer: acceleration due to gravity is always the same </h2><h2 />

According to the experiments done and currently verified, in vacuum (this means there is not air or any fluid), all objects in free fall experience the same acceleration, which is <u>the acceleration of gravity</u>.  

Now, in this case we are on Earth, so the gravity value is 9.8\frac{m}{s^{2}}  

Note the objects experience the acceleration of gravity regardless of their mass.

Nevertheless, on Earth we have air, hence <u>air resistance</u>, so the afirmation <em>"Free fall is a situation in which the only force acting upon an object is gravity" </em>is not completely  true on Earth, unless the following condition is fulfiled:

If the air resistance is <u>too small</u> that we can approximate it to <u>zero</u> in the calculations, then in free fall the objects will accelerate downwards at 9.8\frac{m}{s^{2}} and hit the ground at approximately the same time.  


5 0
4 years ago
Which type of macromolecules helps a cell brake down food?
velikii [3]

Answer:

Hope this helps you find the answer

Explanation:

Chemical Digestion of Carbohydrates, Proteins, Lipids, and Nucleic Acids. The chemical breakdown of the macromolecules contained in food is completed by various enzymes produced in the digestive system.

5 0
3 years ago
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