Which of these can the Doppler effect be used to deduce in astronomy?
A.
the shape of the orbital path of an object
B.
whether the object is traveling toward or away from us.
C.
the chemical composition of the object
D.
the type of spectrum the object emits

Avariable that is positioned between the independent variable and the dependent variable but does not interact with either to affect the relationship between them is called a variable. select one: a. moderating b. spurious c. mediating d. causal

You are only allowed to use tutors that your school recommends. t / f

Afootball game between the thunder and the sharks is in its closing minutes, with the thunder ahead by 20 points. the thunder’s coach considers sending in the second-string quarterback. this would reduce the risk of the star quarterback getting injured, but the second-string quarterback is not very good. complete the passage describing the coach’s decision in economic terms.