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3 years ago

What is the atmosphere made up of?

2 answers:

3 0

The atmosphere is made up of 21% oxygen, 78% nitrogen, 0.9% argon, and 0.03% carbon dioxide with very small %s of other elements.

Reptile [31]3 years ago

3 0

Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.

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A 1000kg car has a speed of 32m/s. If it takes 7s to stop the car, what is the impulse and the average force acting in the car

Alexus [3.1K]

1) Impulse: -32,000 kg m/s

The impulse acting on the car is equal to the change in momentum of the car:

$I= \Delta p = m (v-u)$

where in this problem we have

m = 1000 kg is the mass of the car

v = 0 m/s is the final velocity of the car

u = 32 m/s is the initial velocity of the car

Substituting values into the equation, we find

$I=(1000 kg)(0-32 m/s)=-32,000 kg m/s$

2) -4751 N

The impulse exerted on the car is also equal to the product between the average force, F, and the duration of the collision, t:

$I=Ft$

where in this situation we know

$I=-32,000 kg m/s$ is the impulse

t = 7 s is the duration of the collision

Solving the formula for F, we find the average force:

$F=\frac{I}{t}=\frac{-32,000 kg m/s}{7 s}=-4,571 N$

and the negative sign means that the force is in the opposite direction to the motion of the car.

5 0

3 years ago

The hindenburg zeppelin contained 200,000 m^3 of hydrogen, with a density of 0.0899 kg/m^3. What is the mass of the hydrogen?

oksian1 [2.3K]

d=m/v

0.0899=m/200000

or,0.0899*200000=m

m=17980

6 0

3 years ago

Read 2 more answers

Which statement accurately describes impulse?<br> State corrrect answer from the choices

zhuklara [117]

Answer:

5354..

Explanation:

6 0

3 years ago

Rank the vector combinations on the basis of their magnitude.

melomori [17]

I think this is about the 5th or 6th time I've seen this question
submitted to Brainly. So far, nobody has yet given us any of
the rest of the question ... the part that tells us something about
the vectors, so that we have some way to know their magnitudes.
So far, nada.

6 0

3 years ago

3. If an undetected air bubble was trapped inside the gas collection tube, how would this affect your calculated percent yield?

soldi70 [24.7K]

When an air bubble gets trapped inside the gas collection tube, then the gas that is actually collected becomes impure. This will definitely give an inaccurate result and the calculated percentage yield will be wrong. I hope that this is the answer that you were looking for and it has come to your help.

5 0

3 years ago