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Tpy6a [65]
3 years ago
7

You push a heavy crate. at first it doesn't move. you push harder, and it finally starts to move, but you still have to exert so

me force to keep it moving at a constant velocity.explain
Biology
1 answer:
Galina-37 [17]3 years ago
3 0
Newton's first law of motion states that when there is no net external force, an object will remain at rest or travel with a constant velocity. 
When an object is moving, there is a force of friction resisting the motion, and slowing it down. To maintain a constant velocity, a person must push with a force equal to that of friction, to counteract the frictional force. 
Since the pushing force cancels the friction force out, there is no net external force, and so the object moves at a constant velocity

Hope I helped! xx
P.S.: Think this question is more suited to be asked under the "Physics" section
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Answer:

0.056

Explanation:

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There are several different kinds of aquatic ecosystems. Bogs get their water from precipitation, so they don't have many Fill i
Ratling [72]
  1. Bogs get their water from precipitation, so they don't have many <u>nutrients</u>.
  2. Marsh plants are adapted to waterlogged <u>soil</u>
  3. Swamps have <u>plants like trees and shrubs</u>.
  4. Rivers always have flowing currents and pick up <u>sediment</u> as they flow.
  5. Lakes are bodies of water on land.  
  6. Wetlands act as filters for nutrients and pollutants dissolved in the water.
  7. Estuaries are wetland regions where freshwater rivers mix with ocean water.

Explanation:

A wetland is a biome which has both water and land that are intermixed in various ways. According to the type of the wetland, the ecosystem differs.

Bogs: Wetland with water from precipitation and no inflow or outflow of surface or ground water.  

Soil: Acidic, infertile with less nutrient content

Vegetation: Acid-loving plants

Swamps: Forest wetlands near rivers and lakes.

Soil: well draining, mineral soil

Vegetation: Trees and bushes. Swamps are classified according to the vegetation, like coniferous swamp, hardwood swamp, shrub swamp etc

Marsh: Wetlands mostly inundated with water leading to waterlogged soil  

Soil: Organic and mineral soil

Vegetation: Hydrophytic plants adapted to waterlogged soil

Estuaries: Wetland regions enclosed by land one side where fresh water mixes with saline ocean water.  

Soil: Saline alkaline soil

Vegetation: Mangrove trees

Rivers and lakes are water bodies that form a part of wetlands.  

Rivers are flowing water bodies which flows through water current and picks up sediments as it flows.

Lakes are stationary water bodies that are enclosed by land mass on all its sides.

The wetlands act as a natural filter and receive all the sediments, pollutants etc which are dissolved in water and carried by the rivers and other water sources.

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3 0
2 years ago
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arsen [322]

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the right awnser is 3 b and 1 w vote brainliest this is right.

Explanation:

7 0
3 years ago
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Tems11 [23]

Answer:

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Explanation:

The biological concept of species states that:

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