Which diagram of the container below correctly indicates the distribution of molecules a and b after the net movement of these molecules stops?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d. a round-trip ride to school and back

Describe two recent or ongoing space missions.

Study this image which statement best describes the rock shown check all that apply