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iragen [17]
3 years ago
8

4. Why are coral reefs only found in tropical water? *

Biology
2 answers:
Advocard [28]3 years ago
7 0
They require shallow waters where the sun can reach them!
strojnjashka [21]3 years ago
6 0

Answer:

They require shallow water where the sun can reach them.

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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.

First, determine the original length Lo, where for a SHM the time period is related to length and the gravitational acceleration by the equation

T = 2π×√(Lo/g)..... (1)

Let's make Lo the subject of the formulae

Lo = gTo^2/4π^2 ..... (2)

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

Lo = gTo^2/4π^2

= (9.8m/s^2)(8.90s)^2

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

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

Now let use the value of L into equation (1) to get the period T after raising

T = 2π×√(L/g)

= 2π×√(19.223m/9.8m/s^2)

= 8.800s

7 0
3 years ago
What could a scientist do to determine what era the Eocene Period belongs to on the geologic time scale?
Burka [1]

Answer:

Option B) study information related to the Cenozoic era

Explanation:

The complete question is

Scientists discovered that the Eocene time period existed in Earths history around 34 MYA. What do they need to do to determine what time period Eocene belongs to on the geologic time scale?

A) learn what happened during Precambrian time

B) study information related to the Cenozoic era

C) view the timing of events in the Mesozoic era

D) research events that happened during the Paleozoic era

Solution -

The period of Eocene belong to the Cenozoic era. The Cenozoic era is divided into three periods-  

a) The Paleogene – Existed between 65.5 to 23.03 million years ago

b) The Neogene - Existed between 23.03 to 2.6 million years ago

c) The Quaternary – Started some 2.6 million years ago and is continuing till present

The Paleogene is subdivided into three epochs –  

A) The Paleocene – existed between 65.5 to 55.8 million years ago

B) The Eocene – existed between 55.8 to 33.9 million years ago and  

C) The Oligocene – existed between 33.9 to 23.03 million years ago

Hence, studying about Cenozoic era will give information about the Eocene epoch

Hence, option B is correct

5 0
3 years ago
Cells divide to make new cells.
Bogdan [553]

Answer:

Cells come from preexisting cells.

Explanation:

This statement relates to the statement that cells divide to make new cells.

3 0
3 years ago
21. Which stage of aerobic respiration produces ATP and NADH and release CO2?
Nataly [62]
a. glycolysis thats it
4 0
3 years ago
Which of the following best explains how a hurricane can increase an area’s susceptibility to future storms?
spayn [35]
<h3>Correct answer choice is:</h3><h2>d.  Erosion caused by hurricanes can leave coasts more exposed to storms. </h2><h3>Explanation:</h3>

Important erosion, rapture, and removal of solids happen through storms. Beach erosion is a typical consequence of the high waves that transpire when hurricanes pass onto land. The decline of sand makes the beach to grow narrower and deeper in elevation. Storm loops take the sand offshore, keeping and depositing the sediment in great sandbars.

7 0
3 years ago
Read 2 more answers
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