A student used a PhET simulation to investigate factors that affect the strength of electromagnets. Which of the following is the best explanation of the position of the of the compass needle in the investigation? ​

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

Compare and contrast physical changes with chemical changes.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here