Cual es la importancia de movimiento en la sociedad?

Which best represents the law of conservation of mass ?

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Frequency of electromagnetic waves that a radio station is assigned. what do you call this type of wave?