The answer is : randomization was not used in sample selection. The major difference between experimental and quasi-experimental designs is lack of randomization in sampling selection.
Answer:
B. Amplitude: 30cm; wavelength: 110cm
The word insulate means to protect from heat, cold,...
So when a can is insulated, means that is protected from heat.
So the answer is:
C. stays the same :)))
I hope this is helpful
have a nice day
Base substitutions, deletions and insertions.
