1- En el sistema de la figura m, = 2,00 kg y m2 = 6,00 kg. La polea tiene masa despreciable y el coeficiente de fricción entre la superficie y m, es de 0,5.
Determine la fuerza F para que el cuerpo m, suba con aceleración constante de
0.2 m/s?

Which is not true about oxygen-17 and oxygen-18?

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.