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lilavasa [31]
3 years ago
7

Please help with number 5

Physics
1 answer:
fiasKO [112]3 years ago
7 0
The answer would be 3n to the right because 7-4=3 and the 5-5, so they cancel out.
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a motorcycle is moving at a constant speend of 40 km/h. how long doesbit take for the motorcycle to travel a distance of 10 km
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Time = distance/speed
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When a wave slows down it...
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What are 3 examples of elastic collisions?
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3 years ago
Sitting in a second-story apartment, a physicist notices a ball moving straight upward just outside her window. The ball is visi
gregori [183]

Answer:

1.013 s

Explanation:

You  can solve this problem using the equations for constant acceleration motion. The velocity at the bottom of the window can be found using this expression:

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the gravity is negative as it opposes the movement.

(x-x_o) = -\frac{1}{2}gt^2 + v_ot\\v_o = \frac{(x-x_o)+\frac{1}{2}gt^2}{t} = \frac{1.19m+\frac{1}{2} 9.81m/s^2(0.2s)^2}{0.2s} = 6.931 m/s

Now, the time elapsed before the ball reappears is 2 times the time that it takes for the ball to go from the bottom of the window, reach maximum height, and reach again the bottom of the window, minus 2 times the time that it takes for the ball to travel from the top to the bottom of the window. The time that takes to the ball to reach maximum height, or in other words, to time that takes for the velocity of the ball to go from vo to 0m/s:

t_1 = \frac{0m/s - v_o}{g}  = \frac{-6.931 m/s}{-9.81m/s^2} = 0.706 s

Then:

t = 2t_1 - 2*0.2s = 2*(0.706s) - 0.4s = 1.013 s

7 0
3 years ago
What overall charge must a compound have
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The charge? If you mean valance electrons, the answer is 8. All compounds must be equal to that of a noble gas.
4 0
4 years ago
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