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Kazeer [188]
3 years ago
15

Is it true or false that cnidarians help build up coral reefs

Physics
2 answers:
FrozenT [24]3 years ago
6 0
They do in fact help build up coral reefs.
guapka [62]3 years ago
4 0
You answer will be true.
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Which one has greater potential energy? An 8 kg rock sitting on a 2.2 m cliff or a 6 kg rock sitting on a 3.2 m cliff.
Evgesh-ka [11]

Answer: The 6 kg rock sitting on a 3.2 m cliff.

Explanation:

The potential energy of an object of mass M that is at a height H above the ground us:

U = M*H*g

where g is the gravitational acceleration:

g = 9.8m/s^2

Then:

"An 8 kg rock sitting on a 2.2 m cliff"

M = 8kg

H = 2.2m

U = 8kg*2.2m*9.8 m/s^2 = 172.48 J

"a 6 kg rock sitting on a 3.2 m cliff"

M = 6kg

H = 3.2m

U = 6kg*3.2m*9.8m/s^2 = 188.16 J

You can see that the 6kg rock on a 3.2m cliff has a larger potential energy.

6 0
3 years ago
How far does a car travel in 10 s if its initial velocity is 3 m/s and its acceleration
victus00 [196]

To learn more about Acceleration please visit -
brainly.com/question/13563385
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4 0
2 years ago
What is a rarefraction?
lidiya [134]
<span>diminution in the density of something, especially air or a gas.</span>
3 0
3 years ago
X=3t^2-12t+5 calculate time t=1 and time when velocity zero
anyanavicka [17]
You plug your 1 into all spots where the variable is T. Then after you’ve done this, you simply simplify the problem. Then after simplifying you should have an equation where you are simply adding and subtracting which will give you the final answer of 2.

X=3T^2-12T+5
X=3(1)^2-12(1)+5
X=(3)^2-12+5
X=9-12+5

X=2
4 0
3 years ago
Which of the following has the most thermal energy?
Lelechka [254]
Answer:
2. A 1 litre mug of hot chocolate at 75 degrees.

Explanation:
Thermal energy is directly proportional to mass, so as the mass increases, the thermal energy of the substance increases as well.
8 0
3 years ago
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