An object can be moving from 10 seconds and still have zero displacement

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Convection currents are caused by differences in what two things?

You can melt ice by applying pressure because the solid/liquid line has a slope.