A piece of pine wood floats on the surface of a lake because the water exerts

2 answers:

7 0

surface tension causes the wood to remain on the surface of the water, and is a result of the cohesion of water molecules being stronger than the force of the wood on the surface

Kipish [7]1 year ago

4 0

Thats odd my answer didnt get published stranged, anhow what I was saying is that due to the surface area and mass of the tree is has enough bouyency to stay afloat because of the surface tension on the water with the tree.

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a 24 kg rock containing 3,528 j of potential energy rests upon the edge of a cliff how tall is the cliff

GenaCL600 [577]

Potential gravitational energy is computed with the formula:

$PEgrav=mgh$

Where:
PEgrav = Potential gravitation energy (J)
m = mass (kg)
h = height (m)
g = acceleration due to gravity (9.8m/s^2)

Take note that acceleration due to gravity is a constant.

All you need to do is put in what you know and solve for what you don't know. So your given is the following:
PEgrav = 3,528J
m = 24 kg
g = 9.8 m/s^2
Put that into your formula:
$PEgrav=mgh$
$3,528J = (24kg)(9.8m/s^{2})(h)$
$3,528J = (235.2kg.m/s^{2})(h)$
$\frac{3,528J}{235.2kg.m/s^{2}} = h$
$15m=h$

The height of the cliff is 15m.

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1 year ago

A book sits on a desk. Which of the following must happen before an electrical force can act on the book?

raketka [301]

Answer:

The last one and the second one

Explanation:

Both of those are technically correct. There must be a charge through the book before an electrical force can act on it. Id have to say the last one

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1 year ago

Which of the following diagrams represents the correct cycling of gases?

serg [7]

the answer to this question is the last one i think it might be the first one

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2 years ago

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Arteries are blood vessels that transport oxygen-rich blood and nutrients throughout the body. What level of organization is an

Contact [7]

Answer:C

Explanation:

The arteries are not a cell bc that is too simple a tissue is also too simple its not a system bc arteries are not a lot of organs working together so its C

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2 years ago

Lipogenesis is common for organic molecules because the intermediate ________ is formed in most nutrient metabolic processes. gl

Anastasy [175]

I think, Lipogenesis is a common for organic molecules because the intermediate Acetyl-CoA is formed in most metabolic processes. Lipogenesis involves the formation of fatty acids from Acetyl-CoA. Acetyl-CoA is an intermediate stage in metabolism of simple sugars, such as glucose, which is the preferred source of energy for most living organisms.

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1 year ago