A student spends 2 hours one night recording the movement of the Big Dipper constellation compared to a tree on the north side of the yard. During that time, the Big Dipper appears to move higher above the tree. How should the student explain the movement of the Big Dipper constellation​

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Fredrick griffith made a scientific discovery in 1928

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.