Express (4.3 106 )-1/2 in scientific notation.
A) 2.1 103 B) 4.8 10-4 C) 2.1 104 D) 2.1 10-5
Question 2
A stone is thrown vertically upward. At the top of its vertical path its acceleration is
A) zero.
B) 10 m/s2.
C) somewhat less than 10 m/s2.
D) undetermined.