What does the redshift indicate about the star's movement and change in
frequency?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?