1) 234 s, 6.18 km
The position of the car at time t is described as
where
is the velocity of the car
The position of the head of the train instead is given by
where
d = 1.30 km is the initial distance between the car and the head of the train
is the velocity of the train
The car overtakes the train when
Substituting and solving for t,
And the distance travelled by the car is
2) 27.5 s, 0.72 km
In this case, the train is travelling in opposite direction, so we can write
Again, we can use the same equation as before
And solving for t, we find
And the distance travelled by the car is
Answer:
When the volume increases or when the temperature decreases
Explanation:
The ideal gas equation states that:
where
p is the gas pressure
V is the volume
n is the number of moles of gas
R is the gas constant
T is the gas temperature
Assuming that we have a fixed amount of gas, so n is constant, we can rewrite the equation as
which means the following:
- Pressure is inversely proportional to the volume: this means that the pressure decreases when the volume increases
- Pressure is directly proportional to the temperature: this means that the pressure decreases when the temperature decreases
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
The Quantum Theory
Hope this helps
Answer:
The volume of water evaporated is 199mL
Explanation:
Concentration is calculated with the following formula
where n is the number of moles of solute and V is the volume of the solution (in this case is the same as the solvent volume) in liters.
So we isolate the variable n to know the amount of moles, using the volume given in liters
Now, we isolate the variable V to know the new volume with the new concentration given.
Finally, the volume of water evaporated is the difference between initial and final volume.
