The actually speed of sound in water is 1,498, which is closest to 1,500 meters per second.
-Steel jelly
Answer:
Two-element compounds are usually ionic when one element is a metal and the other is a non-metal.
Explanation:
sodium chloride: NaCl, with Na+ and Cl- ions
lithium nitride: Li3N, with Li+ and N3- ions
magnesium oxide: MgO, with Mg2+ and O2- ions
calcium phosphide: Ca3P2, with Ca2+ and P3- ions
An unspecialized cell that can give rise to one or more different types of specialized cells, such as blood cells and nerve cells. Stem cells are present in embryos and in various tissues of adult organisms
Answer: The statemens correct are: A) In a β-pleated sheet, the side chains extend above and below the sheet,
C) The α-helix is held together by hydrogen bonds between the amide N-H and C=O groups
D) The secondary level of protein structure refers to the spatial arrangements of short segments of the protein
E) Peptide bonds stabilize secondary structure
Explanation: The statement B is incorrect, because the amino acid side chains extend outside the alpha-helix, not inside
Mammals survived the K-Pg mass extinction event because they are able to regulate their body temperature in the face of reduced sunlight and colder temperatures.
<h3>What is the K-Pg mass extinction event?</h3>
The K-Pg mass extinction event is a sudden extinction of mammals that happened over 66 million years ago on earth and affected several species.
One of the factors that enabled the mammals to survive this K-Pg mass extinction event is that mammals are able to regulate their body temperature in the face of reduced sunlight and colder temperatures.
Learn more about mammals: brainly.com/question/10194338
