Um corpo A, de massa 15 kg, é conectado a outro, B, de massa 2,5 kg, por meio de um fio ideal. O corpo A é puxado através de uma força horizontal F, de módulo 70 N. Determine a aceleração do conjunto. Dados: Adote g = 10 m/s² e despreze qualquer atrito.

A) 1 m/s²
B) 2 m/s²
C) 3 m/s²
D) 4 m/s²
E) 5 m/s²

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

How many molecules are present in 3 mols of silicon dioxide (sio2)?