A mass (10 kg) slides down to the left on an
inclined 30° surface
with coefficient of friction
Ulkinetic=0.2. It is connected
over a pulley to a hanging
5 kg mass by a massless
stretch-free cord. What is
the acceleration up the plane
of the mass on the plane? (Work needed)

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?