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Natasha2012 [34]
3 years ago
8

Why is burning a paper a chemical change​

Physics
1 answer:
Sauron [17]3 years ago
3 0

when we burn a paper it undergoes the combustion reaction.

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A bullet of .05 kg is fired into a block of wood. Knowing that the bullet left the gun with a muzzle velocity of 350. m/s, and t
Lunna [17]

We know, Impulse of a body is change in momentum.

Also, the final velocity of wood block is 0 m/s.

So, Impulse = Final Momentum - Initial Momentum

Impulse = 0 - ( 0.05 kg × 350 m/s )

Impulse = - 17.5 kg m/s

Therefore, the impulse exerted by the wood on the bullet is -17.5 kg m/s .

6 0
3 years ago
2. Before 0.5-kg ball is dropped from a third story window 20 m above the sidewalk. What is the potential
Flauer [41]

Answer:

C

Explanation:

C

20*9.8*0.5

98

4 0
3 years ago
Read 2 more answers
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guajiro [1.7K]
Higher the pressure the air would spread apart causing the paper to move to the other side. So higher pressure causes the papers to move farther apart.
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3 years ago
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A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum. might be:. A. zero. B. 3. C. 12. D. 47
kiruha [24]
The correct answer among the choices provided is option C. The magnitude of the sum of 20 and 25 might be 12. Inequality triangle equation is used to determine if 12 is right.
<span>12+20 > 25 (correct)
12+25 > 20 (correct)
20+25 > 12 (correct)</span>
6 0
4 years ago
A stone falls freely from rest. How far does it fall in the first 10 seconds
jekas [21]
Presuming that air resistance can be ignored and we are saying that it accelerates due to gravity then we can form an equation using the formula s=ut+1/2at²
u=0
t=10
a=9.8
s=0*10+1/2*9.8*10²
s=490m
8 0
3 years ago
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