The weight of 20 kg is
(mass) x (gravity) =
(20 x 9.8) = 196 newtons, downward.
There must be a force of 196 newtons upward on the mass.
Otherwise the mass is accelerating either up or down.
<span>The Cardiovascular system is the system that helps the body maintain homeostasis by giving it the nutrients it needs to perform different functions</span>
A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs.
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The running speed of Jenny willl be 2.5 times the velocity she walks.
<h3 /><h3>What is velocity?</h3>
The change of distance concerning to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
Condition 1;
She takes 25 minutes to run 1,000 m and walk 1,600 m The total time to run as well as the walk is 25 minutes.

As we know that;
Distance = speed × time

For walking;


Same as for condition 2;


Condition 3;



Hence their running speed of Jenny willl be 2.5 times the velocity at she walks.
To learn more about the velocity, refer to the link: brainly.com/question/862972.
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