What type of forces cause changes in motion?

A. Balanced forces

B. Equal and opposite horizontal forces

C. Equal and opposite vertical forces

D. Unbalanced forces

Plz I need help

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Express the following number in scientific notation. 0.026890 =

The excretory system,need answers for all: )