1-) Uma carga elétrica Q é colocada em um ponto do espaço vazio. Este sistema elétrico tem energia potencial elétrica? Explique.
2-) Sejam duas cargas elétricas de valores iguais a 2x10(elevado a -6) C e 4x10(elevado a -4) C separadas por uma distância igual a 3m. Quanto vale a energia potencial elétrica deste sistema?

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.

Atank is filled with an ideal gas at 400 k and pressure of 1.00 atm . part a the tank is heated until the pressure of the gas in the tank doubles. what is the temperature of the gas?

What is the relationship between globular clusters and the milky way?