Select all that apply. No work is accomplished in which of the following situations? 1.A refrigerator on rollers is pushed across a level floor at a constant velocity. 2.A girl pulls up on a window to open it, but it won't move. 3.A boy lifts a 4.0-newton box to a height of 1.0 meters.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

i think its c if i'm wrong

e/c, where e is its total energy

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it