Me i can describe a real-world situation in which opposite quantities combine to make zero. i can represent addition and subtraction on vertical and horizontal number line diagrams. i can demonstrate how to add two numbers using absolute value and a number line diagram. i can interpret sums of rational numbers by describing real-world situations.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Which element is least likely to undergo a chemical reaction

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt