Answer:
I would suspect internal bleeding.
Explanation:
Internal Bleeding. As she has pain in abdomen and nausea means she is loosing blood. As result of low blood in body vessels, she is feeling great thirst as well as sugar level is going down.
Answer:
A - Watt
Explanation:
Watt is the unit of electrical power in a metric system, expressed in terms of energy per second, equal to the work done at a rate of 1 joule per second is
power formula is P = V × I,
where V is the voltage in a circuit
I is the current flowing through that circuit.
In the SI (metric) system, the units of power are watts.
A reasonable hypothesis would be that, nothing changes with can A (no expansion at all), and Can C is expanding, but Can B is expanding even faster than Can C. (I don't know, if this hypothesis is correct though)
Let say the two train cars are of masses 
and 
now if the speed of two cars are 
and 
then we can say that the momentum of two cars before they collide is given by
here two cars are moving in opposite direction so we can say that the net momentum is subtraction of two cars momentum.
Now since in these two car motion there is no external force on them while they collide
So the momentum of two cars are always conserved.
hence we can say that the final momentum of two cars will be same after collision as it is before collision
