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Andrew [12]
3 years ago
10

The amount a string stretches varies linearly with the mass applied to the spring, as can be seen in the video. In the video, wi

th no additional mass, the hanger was 30.6 cm off the ground. With 150 grams of additional mass, the hanger was 16.2 cm off the ground.
A wooden block stretched the spring so the hanger was 24.9 cm off the ground. Determine the mass of the wooden block, to at least 1 decimal place.
Mathematics
1 answer:
Gekata [30.6K]3 years ago
8 0

The answer for this question is 92.7 at leaat 1 decimal place


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The summer has ended and it’s time to drain the swimming pool. 20 minutes after pulling the plug, there is still 45 000L of wate
WITCHER [35]

Answer:

  a) -900 L/min

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  c) v = -900t +63000

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Step-by-step explanation:

a) You are given two points on the curve of volume vs. time:

  (t, v) = (20, 45000) and (70, 0)

The rate of change is ...

  Δv/Δt = (0 -45000)/(70 -20) = -45000/50 = -900 . . . . liters per minute

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b) In the first 20 minutes, the change in volume was ...

  (20 min)(-900 L/min) = -18000 L

So, the initial volume was ...

  initial volume -18000 = 45000

  initial volume = 63,000 . . . . liters

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c) Since we have the slope and the intercept, we can write the equation in slope-intercept form:

  v = -900t +63000

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d) Put the number in the equation and do the arithmetic.

When t=62, the amount remaining is ...

  v = -900(62) +63000 = -55800 +63000 = 7200

7200 L remain after 62 minutes.

6 0
3 years ago
Simplify the number using the imaginary unit i: (square root) -28
olasank [31]
<span>(square root) -28
=</span><span>(square root) 4*-7
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Gemiola [76]

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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0.350 is bigger

Step-by-step explanation:

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