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ololo11 [35]
4 years ago
14

Two birds collide in midair. Before the collision, their combined momentum was 35 kg-m/s to the east. What is their combined mom

entum after the collision? A. 35 kg-m/s down B. 35 kg-m/s east C. 35 kg•m/s north D. 35 kg•m/s west​
Physics
1 answer:
hram777 [196]4 years ago
6 0

Answer:

35 kg east

(b)

Explanation:

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What will happen to a periodic wave acted upon an external damping force?
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The wave will decrease in its frequency due to a disturbing force acting upon it.
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A viscous fluid is flowing through two horizontal pipes. The pressure difference P1 - P2 between the ends of each pipe is the sa
777dan777 [17]

Answer:half of shorter Pipe

Explanation:

Fluid is Flowing through two horizontal pipes with pressure difference

P_1-P_2=\Delta P

Both pipes have same radius

Length of one Pipe is twice of other

Let Longer Pipe be denote by 1 and smaller by 2

From Hagen Poiseuille equation

\Delta P=\frac{128\mu L\cdot Q}{\pi D^4}

Where \mu =viscosity of medium

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D=diameter

For longer Pipe

\Delta P=\frac{128\mu 2L\cdot Q_1}{\pi \cdot D^4}----1

For smaller Pipe

\Delta P=\frac{128\mu L\cdot Q_2}{\pi \cdot D^4}------2

From  1 &  2 we get

2L\cdot Q_1=L\cdot Q_2

Q_2=2Q_1

volume flow rate of longer pipe is half of smaller pipe

6 0
3 years ago
A radioactive sample has a count rate of 10,000 Bq. 24 days later the activity has fallen to 625 Bq. What is the half-life of th
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Answer:

10000 Bq / 625 Pq = 16

Radioactivity has decreased by a factor of 16

2^4 = 16

So the sample has gone thru 4 half-lives

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Answer:

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Explanation:

these are all correct

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