Experimentalmente, observa-se a existência de uma força com propriedades semelhantes às da força gravitacional. Essa força elétrica e os corpos que sofrem forças elétricas apresentam uma propriedade chamada carga elétrica. Considerando-se duas cargas elétricas pontuais e iguais que se repelem com uma força de intensidade 1,6N quando colocadas a 3,0cm de distância no vácuo onde a constante elétrica k igual a 9,0.10>9Nm²/C², o valor absoluto de suas cargas elétricas, em nC, é igual a

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc