Answer:
Thank you so much!!!!
Explanation:
I really need this points
A. Angular momentum is always conserved would be the correct answer.
This is because like linear momentum (mvmv), angular momentum (r×mvr×mv) is a conserved quantity, where rr is the vector from the center of rotation. For a skater holding a static pose, for each particle making up her body, the contribution in magnitude to the total angular momentum is given by mirivimirivi. Thus bringing in her arms reduces riri for those particles. In order to conserve angular momentum, there is then an increase in the angular velocity.
hope this helps!
Answer:
i got b but urs is a little different tell me if right
Explanation:
i go 100 on my test
I believe it’s c if not sorry
The weight of the ball including the air inside is 1.519 N
Explanation:
First of all, we calculate the volume of the ball, which is the volume of a sphere:
where
r = 21.6 cm = 0.216 m is the radius
Substituting,
Now we can calculate the mass of the air inside the ball, knowing that its density is
Its mass is
We also know that the mass of the ball is
m = 0.100 kg
So the total mass is
Finally we can calculate the weight:
where 
is the acceleration of gravity. Substituting,
Learn more about weight:
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