Biết j(t)=10sin(2t+30o ), R=5, L=0,5H, C=0,04F.
a. Tìm biểu thức dòng điện i(t) qua các phần tử
b. Tìm điện áp uR(t), uL(t), uC(t)
c. Tìm biểu thức điện áp uab(t)
d. Tính công suất tức thời trên các phần tử.

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Which statement best explains why the overall charge on an atom is zero?