Answer the following question given this paragraph: Distance Although displacement is described in terms of direction, distance is not. Distance is defined to be the magnitude or size of displacement between two positions. Note that the distance between two positions is not the same as the distance traveled between them. Distance traveled is the total length of the path traveled between two positions. Distance has no direction and, thus, no sign. For example, the distance the professor walks is 2.0 m. The distance the airplane passenger walks is 4.0 m. Misconception Alert: Distance Traveled vs. Magnitude of Displacement It is important to note that the distance traveled, however, can be greater than the magnitude of the displacement (by magnitude, we mean just the size of the displacement without regard to its direction; that is, just a number with a unit). For example, the professor could pace back and forth many times, perhaps walking a distance of 150 m during a lecture, yet still end up only 2.0 m to the right of her starting point. In this case her displacement would be +2.0 m, the magnitude of her displacement would be 2.0 m, but the distance she traveled would be 150 m. In kinematics we nearly always deal with displacement and magnitude of displacement, and almost never with distance traveled. One way to think about this is to assume you marked the start of the motion and the end of the motion. The displacement is simply the difference in the position of the two marks and is independent of the path taken in traveling between the two marks. The distance traveled, however, is the total length of the path taken between the two marks. Q: What property is defined as the magnitude or size of displacement between two positions? Choices: - gravity - Distance - passing - distance A:
distance
(Question)
Answer the following question given this paragraph: The Diaphragm The change in volume of the thoracic cavity during breathing is due to the alternate contraction and relaxation of the diaphragm (Figure 11.17). It separates the thoracic and abdominal cavities, and is dome-shaped at rest. The superior surface of the diaphragm is convex, creating the elevated floor of the thoracic cavity. The inferior surface is concave, creating the curved roof of the abdominal cavity. Q: How does the diaphragm look like when it is at rest? Choices: - flat - inverted - dam - shaped - dome-shaped A:
(Answer)
dome-shaped
Ques: Answer the following question given this paragraph: enzymes - proteins which speed up chemical reactions. Q: Enzymes - proteins which speed up what? Choices: - crystals reactions - liquid reactions - physical reactions - chemical reactions A:
Ans: chemical reactions
(Q).
Answer the following question given this paragraph: Of the 23 pairs of human chromosomes, 22 pairs are autosomes (numbers 122 in Figure above ). Autosomes are chromosomes that contain genes for characteristics that are unrelated to sex. These chromosomes are the same in males and females. The great majority of human genes are located on autosomes. At the link below, you can click on any human chromosome to see which traits its genes control. http://www. ornl. gov/sci/techresources/Human_Genome/posters/chromosome/chooser. shtml. Q: Which blood vessels is oxygen transferred through? Choices: - cilia - arteries - veins - capillaries A:
(A).
capillaries
Ques:Answer the following question given this paragraph: 1. The spacing of contour lines shows the slope of the land . Contour lines that are close together indicate a steep slope. This is because the elevation changes quickly in a small area. Contour lines that seem to touch indicate a very steep slope, like a cliff. When contour lines are spaced far apart, the slope is gentle. So contour lines help us see the three-dimensional shape of the land. Q: What do contour lines that are close together indicate? Choices: - deep slope - close slope - flat slope - steep slope A:

Ans:steep slope
Ques: Answer the following question given this paragraph: Mollusks are probably most closely related to organisms in the phylum Annelida , also known as segmented worms. This phylum includes the earthworm and leech. Scientists believe these two groups are related because, when they are in the early stage of development, they look very similar. Mollusks also share features of their organ systems with segmented worms. Unlike segmented worms, however, mollusks do not have body segmentation. The basic mollusk body shape is usually quite different as well. Q: Mollusks are probably most closely related to organisms in the phylum annelida , also known as what? Choices: - sedimentary worms - indigenous worms - elongated worms - segmented worms A:
Ans:
segmented worms