Answer:
T=21.7 min
Explanation:
The volume of one mole of gas at STP is
22.4 L
10.0 L
then has
n'=10.0/22.4 moles
the total energy released is then
Et= (10.0/22.4)* 286 kJ
Et=127.678 KJ
Power*time = energy, so time = energy/power =
Power=100W
Power=100 J/s
T= 127.6785kJ/100J/s = 1277 sec
T=1276.78sec/60min=21.3 min
Answer:
B. The gas must release heat to its surroundings.
Explanation:
Since the process is reversible , it must be slow . Since temperature is kept constant so the internal energy is constant , Since volume is decreased , pressure must be increased. Since work is done on the gas ( gas is compressed ) , so heat must be released by the gas so that its internal energy remains constant.
Answer:
it takes the car 4.362 seconds to cover the distance of 88.4 m.
Explanation:
The distance the car covers is given by the function
,
where , and , putting these in we get:
Now, when the car has moved to 88.4m, , or
which is a quadratic equation with solutions
We take the first solution , <em>since at that time the car is still moving right and decelerating</em>. The second solution describes the situation where the car has stopped decelerating and is now moving leftwards because the decelerating is leftwards, <em>which is utterly wrong because we know that cars do not start moving backwards after the brakes have stopped them! </em>
Thus, it takes the car 4.362 seconds to cover the distance of 88.4 m.
Answer:
La densidad (más precisamente, la densidad de masa volumétrica; también conocida como masa específica), de una sustancia es su masa por unidad de volumen. El símbolo más utilizado para la densidad es la letra griega en minúsculas rho), aunque también se puede utilizar la letra latina D. Matemáticamente, la densidad se define como masa dividida por volumen: .m/V donde es la densidad, m es la masa y V es el volumen. En algunos casos (por ejemplo, en la industria del petróleo y el gas de los Estados Unidos), la densidad se define libremente como su peso por volumen unitario, aunque esto es científicamente inexacto – esta cantidad se llama más específicamente peso específico.
Explanation: