Suppose that the universe were infinite in both extent and age. In that case, we would expect the night sky to be .

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.