A student makes a model of the sun-Earth system by swinging a ball around her head. Using this model, the student is trying to explain how Earth stays on a path around the sun. Model of the sun and earth. Hand = Sun. Ball = Earth. path of ball.

The student explains that this path is the result of —

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.