If the mass of a pendulum is increased (with other factors controller), would the period (time) decrease or stay the same?

Explain what happens at the saturation point when adding salt to water at room temperature.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

What’s #16 asking me and how do i solve it?