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3 years ago

According to the ideal gas law, increasing the volume of a closed reaction container decreases the thermal energy because the

Physics

2 answers:

Phoenix [80]3 years ago

6 0

Answer:

D is the answer

Explanation:

According to the ideal gas equation:

$\frac{PV}{T}=nR$

The nR are constant because you are not letting molecules of the gas scapes or enter the container even if you double the size, so in order to keep the right side constant as the Volume increases, the pressure must decrease (this is thinking that temperature is the same through all the process), and with more space to move, the collision between particles decreases too.

The thermal energy is linked to the collision between particles, if the number of collisions decreases, then the thermal energy decreases because the total kinetic energy is less now, so in general the energy in the system is less.

Where did all that energy go? it has been lost at the moment of the expansion of the volume, a work has been done to the surroundings

viva [34]3 years ago

4 0

B is ur answer the temputer does increase

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$S_c = v_c t_c$
where
$v_c$ is the car's speed
$t_c = 4 h$ is the duration of the car ride

Similarly, the distance covered by train is equal to the product between the train's speed and the duration of the train ride, 7 h:
$S_t = v_t t_t$

The total distance covered is S=255 km, which is the sum of the distances covered by car and train:
$S=255 km = S_c + S_t$
which becomes
$255 = 4 v_c + 7 v_t$ (1)
we also know that the train speed is 5 km/h greater than the car's speed:
$v_t = 5 + v_c$ (2)

If we put (2) into (1), we find
$255 = 4v_c + 7(5+v_c)$
and if we solve it, we find
$v_c = 20 km/h$
$v_t = 25 km/h$

So, the car speed is 20 km/h and the train speed is 25 km/h.

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Hi there!

Impulse = Change in momentum

I = Δp = mΔv = m(vf - vi)

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vf = final velocity (m/s)

vi = initial velocity (m/s)

Begin by converting grams to kilograms:

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