A wave pulse happens when a wave travels through a medium from one end to the other. The wave pulse causes the medium to move up and down as it travels through the medium, but it does not cause the medium to be moved from one end to the other. Draco creates a wave pulse in a spring by moving one end of the spring up and down. The picture below shows the wave pulse moving from one end of the spring to the other.

Draco is going to create another wave pulse by moving the spring up and down again. Which of these must be true if he moves the spring up and down more slowly the next time?
A.
The wave pulse will be shorter.
B.
The wave pulse will be higher.
C.
The wave pulse will be longer.
D.
The wave pulse will travel faster.

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Aboy with an extra x chromosome probably has which of the following syndromes?

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.