Answer:
Explanation:
As we know that there is no external torque on the system of two disc
then the angular momentum of the system will remains conserved
So we will have
now we have
also we have
now from above equation we have
now we have
30 POINTS!!! CAN U AWNSER IT?? :)
1 answer:
Answer:
5235.84 kg
Explanation:
There is one theorem - whose proof I will never remember without having to drag calculus in there - that says that the variation of momentum is equal to the force applied times the time the application last.
As long as the engine isn't ejecting mass - at this point it's a whole new can of worm - we know the force, we know the variation in speed, time to find the mass. But first, let's convert the variation of speed in meters per second. The ship gains 250 kmh,
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First let's convert the time in seconds:
The current is defined as the quantity of charge flowing through a certain section of a circuit per unit of time:
Using I=10 A, and
, we can find the amount of charge flown through the hair dryer in this time:
The charge of a single electron is
, so the number of electrons flown through the hair dryer is the total charge divided by the charge of a single electron:
The current is defined as the quantity of charge flowing through a certain section of a circuit per unit of time:
Using I=10 A, and
The charge of a single electron is