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RideAnS [48]
3 years ago
12

Why is the answer B for this problem?

Physics
1 answer:
gayaneshka [121]3 years ago
4 0

Answer:

B

Explanation:

This looks like a momentum question. It also looks like there is no horizontal acceleration.

Momentum before           Momentum after

m1vo                                   (m1 + m2)*vo/3           multiply through by 3

3 m1*vo                               m1* vo + m2*vo          subtract m1*vo from both sides

3m1*vo - m1*vo                   m2*vo

2m1*vo                                 m2*vo                      Divide by vo

2m1 =                                    m2

Conclusion: It takes 2 m1's to equal 1 m2.

B is the answer.

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One billiard ball strikes another billiard ball, and they move away from each other
xxTIMURxx [149]

Answer:

C) The magnitude and direction

Explanation:

Velocity is a vector quantity, meaning that it has both magnitude and direction.

For the momentum, we look at both the direction of the ball (negative, positive) and the magnitude of the velocity (5 m/s, 10 m/s) when figuring out what to use for "v" in p = mv.

5 0
3 years ago
If we could see our own galaxy from 2 million light-years away, it would appear _________.
yaroslaw [1]

Answer:

It would appear as a flattened disk with a central bulge and spiral arms, spanning a few degrees across the sky.

Explanation:


I hope this helps! Have a great day!

Anygays-

5 0
3 years ago
High pressure<br> system the air moves (up/down) and brings<br> (good/bad) weather
satela [25.4K]

Answer:

high pressure system in the air moves up and brings good weather

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3 0
3 years ago
A 500-watt vacuum cleaner is plugged into a 120-volt outlet and used for 30 minutes. How much current runs through the vacuum?
Ymorist [56]

     Power  =  (voltage) x (current)

       500 W  =  (120 v) x (current)

     Current  =  (500 w) / (120 v)  =  4-1/6 amperes .

Power and current are both rates.
Power is the rate of using energy ... joules per second.
Current is the rate of flowing charge ... coulombs per second.
Neither quantity depends on how long you keep it up.
They're both going on continuously while the vacuum is running.

4 0
4 years ago
Read 2 more answers
If the moon is half full on November 2, on approximately what date will it next become full?
anyanavicka [17]
The complete cycle of lunar phases has a period of 29.531 days.

You've described two phases that are separated by 1/4 of the
complete cycle.

If the moon is exactly at First Quarter (half-full and getting bigger)
at, let's say, 12:00 Noon on November 2 where you are, then it will
be Full after

                29.531 days / 4 =  7 days 9 hours 11 minutes .

That's  9:11 PM on November 9 .
7 0
4 years ago
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