A) The average translational kinetic energy of the molecules in a gas is given by:
where
is the Boltzmann's constant
T is the absolute temperature of the gas
In our problem,
, so the average translational kinetic energy of the molecules is
We have 1.2 mol of this gas, and since one mole of ideal gas contains a number of molecules equal to Avogadro number, the total number of molecules in our gas is
So the total translational kinetic energy of all molecules of the gas is
B) The kinetic energy of a person is given by:
where m is the person's mass and v his velocity. The person has a mass of m=75 kg and its energy is equal to the energy of the gas,
, therefore his velocity must be
Answer:
nitrogen
Explanation:
because I also had this in exam and I was correct
Answer:
La fuerza hacia arriba que actúa a lo largo de la rampa requerida para evitar que el automóvil ruede por la rampa si el automóvil no tiene frenos es 1703.49 N
Explanation:
La información dada es;
La masa del coche, m = 1000 kg
El ángulo de inclinación de la rampa, θ = 10 °
Observamos que el componente del peso del automóvil que actúa a lo largo de la rampa, , está dado por la relación;
= Masa × Aceleración debido a la gravedad, g × Sin (θ)
= 1000 × 9.81 × Sin(10) = 1703.49 N
Por lo tanto, la fuerza que debe aplicarse para evitar que el vehículo ruede por el plano inclinado es igual al peso del automóvil que actúa a lo largo del plano, que es 1703.49 N en una dirección ascendente a lo largo del plano.
Explanation:
It is known that like charges tend to repel each other whereas unlike charges tend to attract each other. This means that two positive charges when come closer to each other will repel each other and if a negative charge comes in contact with a positive charge then both of them will attract each other.
Therefore, when you charge a pocket comb by rubbing it with a silk scarf then the scarf will obtain a certain charge. But as we place this silk scarf closer to the comb then if the scarf gets attracted towards the comb then it means opposite charges are present on both comb and the scarf.
But if the scarf and comb repel each other then it means opposite charges are present on them.