Oi gente, alguém me ajuda por favor em uma questão sobre gases ideais:

10 kg de um gás ideal monoatômico está confinado em um recipiente de paredes adiabáticas que possui um pistão móvel de 200 cm2 de área e massa desprezível submetido a uma pressão externa de 1 atm. sendo o volume total do recipiente 3l à 20◦c, responda:
(a) qual a densidade inicial deste gás?

um aquecedor localizado no interior do recipiente eleva a temperatura
até 70◦c. calcule:
(b) o volume final do gás
(c) o trabalho por ele realizado
(d) a quantidade de calor fornecido ao gás
(e) a variação da energia interna

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Brades exam guidelines exam instructions billing & payments & support question 6 of 20 : select the best answer for the question use this illustration to answer the question below. forms & resources al programs 9 ww linics 6. in the circuit shown in the figure above, suppose that the value of r, is 100k, and the value of r2 is 470 kq. at which of the following locations in the circuit would you measure the highest voltage with your meter? rvices 999999 a. between points b and c b. between points a and b c. between points b and e d. between points a and c eredu mark for review (will be highlighted on the review page) mend < < previous question next question

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).