Which type of solution turns litmus paper red A. base B. a neutral solution or C. an acid

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

One number is said to be an "order of magnitude" larger than another number if choose one: a. it is 10 times larger. b. it is 5 times larger. c. it is 3 times larger. d. it is 100 times larger. e. it is 2 times larger.