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mel-nik [20]
3 years ago
6

Lumps of iron and manganese ore called ________ can be harvested from the seafloor near underwater volcanoes.

Biology
2 answers:
MakcuM [25]3 years ago
5 0

Answer: Poly-metallic nodules

Explanation: Poly-metallic nodules are generally considered to the manganese nodules, formed due to the accumulation of rocks and mineral aggregates at the seafloor, adjacent to the underwater volcanoes.

This nodules appears in concentric layers, i.e these are the layers of manganese hydroxide and iron hydroxide. They are commonly found at the sea floor and have economical importance.

arlik [135]3 years ago
3 0

Answer:

polymetallic nodules

Explanation:

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A performer, seated on a trapeze, is swinging back and forth with a period of 8.90 s. If she stands up, thus raising the center
iren2701 [21]

Answer:

8.800s

Explanation:

When the performer swings, she oscillates in SHM about Lo of the string with time period To = 8.90s.

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Let's put our values into equation (2) to get Lo

Lo = gTo^2/4π^2

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------------------------------

4π^2

= 19.663m

Second instant, when she rise by 44.0cm, so the length Lo will be reduced by 44.0cm and the final length will be

L = Lo - (0.44m)

= 19.663m - 0.44m

= 19.223m

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