Which of the following is a true statement about the speed of sound
a..........Sound travels at a constant speed, regardless of the medium it is traveling through.
b.The closer the molecules are in a substance, the faster sound travels through that substance.
c..........................................Sound travels faster through water than it does through steel.
d............................................. Sound travels faster through air than it does through water.
b
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Building an imaginary playground and describing it is an example of a preschooler who a. wants a great place to play
b. is using discourse skills. c. has wild ideas. d. probably would never create an imaginary playmate.
During the first six months, an infant can be expected to grow as much as one inch in length per month
a. True b. False Indicate whether the statement is true or false
Which one of the following is not included in the criteria for an acceptable research hypothesis?
a. It explains existing data in simpler terms than competing hypotheses do. b. It has better than a 50 percent chance of being true. c. It fits into a framework of existing theories. d. It does not contradict the laws of nature. e. It presents an adequate explanation of the research problem.
Temporal contiguity is the dependence of one action or event on another event or on the presence of a stimulus
Indicate whether the statement is true or false