The population in the united states in 2015 was 321 million people. it is projected to increase to 438 million people by the year 2050.

if projections are true, the us population will increase % from 2015 to 2050

When an object is heated it contracts. a. true b. false

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)