Which TWO statements are true about a system? 1. A system is a group of objects analyzed as one unit.

2. Energy that moves across system boundaries is conserved.

3. There's only one way to define the boundaries of a system.

4. All systems are made by humans.

Astudent is working in the lab to determine how time affect impulse the student keeps the force the same in each row but changes impact the time some data is shown witch trial has the greatest a student is working in the lab to determine how time affect impulse the student keeps the fours the same in each row but change is the impact time some data shown witch trial has the greatest impulse

What are similarities and differences of reflection, refraction, diffraction and absorption?

Consider the following position function. find (a) the velocity and the speed of the object and (b) the acceleration of the object. bold r left parenthesis t right parenthesisr(t)equals=left angle 6 t superscript 4 baseline comma 2 t cubed right angle6t4,2t3 for tgreater than or equals≥0