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melisa1 [442]
2 years ago
5

Two large, plastic tubs were filled with soil The soil was shaped to create a mound in each tub. The starting height of each mou

nd was recorded. The tubs were set outside, side by side The lid was left off of tub A and a lid was placed on top of tub B Once a day, one ounce of water was poured over the top of each mound for ten days straight At the end of the ten days the mound heights were recorded and compared Is this a valid experimental design to test for wind erosion of soil? А) Yes, because dirt is very heavy B) No, because ten days is not long enough U No, since the type of soil was not identified D Yes, steps were outlined for condition with one variable changed lid on or off​
Physics
1 answer:
shutvik [7]2 years ago
6 0

Answer:

b

Explanation:

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power, a force, and movement in the opposite direction of the applied force

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"a musical tone sounded on a piano has a frequency of 261.6 hz and a wavelength of 1.31 m. what is the speed of the sound wave
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To solve this question, we use the wave equation which is:
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3 years ago
We can model the motion of a dragonfly's wing as simple harmonic motion. The total distance between the upper and lower limits o
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Answer:

The maximum speed of the wing tip is 1.25 m/s

Explanation:

In simple harmonic motion, the body experiences a restoring force whose magnitude is directly proportional to the distance from its mean position and its direction is towards the mean position.

The speed in the case of simple harmonic motion is given by the equation :

v = Aωsinωt

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For maximum speed, sinωt = 1 . So, the above equation becomes:

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But, ω = 2πf , here f is the frequency of oscillation. So,

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