A stem is what keeps the plant together and supports their leaves
B. STEMS
Answer: lower atmospheric pressure
Explanation:
During the inspiration process the diaphragm, and external intercostal muscles. The contraction of the diaphragm causes the increase in the size of the thoracic cavity this causes the contraction of the external intercostal muscles. As a result of this the ribs and the sternum get elevated.
This causes the lungs to expand, and increasing the volume of the air passage. In this response the air pressure inside the lungs reduces below the air outside the body. Thus this facilitates the movement of the gases from a region of high pressure to low pressure, this way the air rushes into the lungs.
Answer:
2. The system will be defined by all the parts that act directly on the object, and the object itself.
So the parts are:
The ball.
The air.
The ground. (because this limits the motion of the ball)
The gravitational force (the force that pulls down the ball)
Why is it not the hand or you a part of the system? Because the phenomena is "a ball being dropped" the only action that you do in the ball is release it (you do not impulse it or anything) and we have our time t = 0s, when the ball is dropped, so the hand that was holding the ball is not in the picture for t ≥ 0s, then it is not part of the system.
3. Using what i wrote above, your hand is not in the system.
4. The air is important because it put resistance to the motion of the ball, if there was void, the ball would reach the ground in less time.
5. It is really hard to draw in a computer, so i will give a rough sketch of the system in this case:
Where: g = gravitational force.
H = initial height of the ball, which is really important for this problem.
The paper bags are less harmful than plastic bags because paper bags are made from the tree which is from nature.
<h3>What is plastic?</h3>
Plastic is a unnatural substance. It is bio degradable. The plastic is make stronger by the use of radiation.
The paper bags are made by hands. It contains no processing. While the plastic bags are modified in machines. They involves the use of harmful radiation.
Thus, the paper bags are less harmful than plastic bags.
Learn more about plastic.
brainly.com/question/21219036
#SPJ1