Chemistry
Chemistry, 28.09.2019 05:30, 1119diamondlord

You spot a friend walking on a moving walkway in an airport. you are not on the walkway and you want to keep up with her.

at what speed do you need to walk?

a. the speed of the walkway multiplied by the speed at which she is walking

b. the speed of the walkway minus the speed at which she is walking

c. the speed of the walkway plus the speed at which she is walking

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