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marta [7]
2 years ago
6

A flap of tissue that prevents blood from flowing back is a(n)________ .

Physics
1 answer:
ioda2 years ago
6 0
A valve is a flap of tissue that prevents blood from flowing back
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What is the acceleration of a sinking rock if it has a mass of 0.25 kg and has a net force of 0.44 N acting on it?
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Explanation:

F = mass x acceleration

0.44 N = (0.25)(a)

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A ball is ejected to the right with an unknown horizontal velocity from the top of a pillar that is 50 meters in height. At the
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15.67 m/s

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S=\frac{1}{2}gt^2

where t is the time of the fall. Substituting S=50 m and re-arranging the equation, we can find t:

t=\sqrt{\frac{2S}{g}}=\sqrt{\frac{2(50 m)}{9.8 m/s^2}}=3.19 s

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v=\frac{d}{t}=\frac{50 m}{3.19 s}=15.67 m/s

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