9. A metric ton is 2000 kg. What is the weight of it on Earth if gravity is approximately 10 m/s?? 10. A cat is chasing a bird and traveled 20 m in 2.5 s. How fast is the cat running?
I
11. You are traveling to school at a rate of 40 m/s when you see a red light and slow to a stop. If it took you 10 s to
stop, what was your acceleration?
12. The fastest runner, Hicham El Guerrouj, was clocked running at a rate 7.28 m/s for 1500 m in 1999. How long
did it take him to complete the race?

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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