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lorasvet [3.4K]
3 years ago
6

- A student states that Earth would be no different if water did not expand when it freezes. Do you agree with this statement? E

xplain your answer.
Physics
2 answers:
chubhunter [2.5K]3 years ago
7 0
If water didnt expand when it froze then it would be more dense so ice would sink. If ice sunk then it would cause a lot of ocean life to die because of the cold and water levels to rise more.
Licemer1 [7]3 years ago
4 0

Yes I agree.

The very basic fundamental to remember here is that the ice when expands causes the floating of itself on top of water. Thus, if ice stops expanding, it will not float on the top of water body and thus would sink and may cause the freezing additional water in the water bodies. This could happen in the Antarctic , Arctic and all cold regions. Rivers may stop flowing in cold regions as they all will be frozen and also the survival of species will become difficult

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What happens when humans change the flow of water?
REY [17]

Disaster. (like my life) It'll affect the animals and there will be no way to get their food without water.Hope this helped  :)


8 0
3 years ago
Read 2 more answers
4. Suppose the observed motion of a moving airplane, illustrated by a distance vs. time graph, is nearly a straight line with ze
jekas [21]
It shows that the airplane covers equal distance in equal time interval, that's it has a straight line from the origin.

The plane is moving at uniform speed.
7 0
3 years ago
1. ¿Qué presión se ejerce sobre cada una de las cuatro patas de una mesa si su masa es de 20 kg y
mestny [16]
Tenemos.

Masa de la mesa = 20kg
Masa encima = 10kg
Masa total = 30kg
Area de cada pata = 20cm² = 20cm² * 1/10000cm² * 1m² =0,002m²

Presió(P)n que se ejerce sobre cada pata.

P =F/A
P = Masa por gravedad/A Masa = 30kg Gravedad =9,8m/s²
P =(30kg * 9,8m/s²)/0,002m²
P = 294kg * m/s²/0,002m² Pero kg *m/s² = Nw
P = 294Nw0,002m²
P = 147000 Nw/m² Pero Nw/m² = pa
p =1,47 * 10⁵ pa

Respuesta.
La presión que se ejerce sobre cada pata es de 1,47 * 10⁵pa
8 0
3 years ago
A police officer is using her radar to check speeds. She is moving south at 50 mph. You are moving
Luda [366]

Answer:

the relative speed should be 40mph

Explanation:

8 0
2 years ago
An apple is held completely submerged just below the surface of water in a container. The apple is then moved to a deeper point
Tresset [83]

Answer:

Explanation:

When the apple is held submerged in water , it experiences a buoyant force due to which it floats in water . One has to apply downward force to keep it submerged. The lower the buoyant force , lower the force needed to submerge it in water.

When apple is held at much deeper point , it experience greater pressure due to column of water around it . So its size or its volume decreases . But its weight remains the same . Due to less volume , buoyant force also decreases ( buoyant force is equal to weight of displaced volume of water. )

Due to buoyant force becoming less , force needed on apple  in downward direction will also be less.

4 0
3 years ago
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