20 !
micha ran 2 miles north in 20 minutes. she then turned back and ran 1 mile in 15 minutes. to cool down, she walked the rest of the way home. it took her 20 minutes.

what was micha's average velocity for her run north?

what was micha's average velocity for the whole trip?

what was her average speed for her entire jog?

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount