a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.
randomized variablesl = 90 m
d = 4.5 cm
d = 0.9 mm
i = 9 a
write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.
calculate the number of turns, n, in the solenoid.
write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.
calculate the length of the solenoid (l2) in meters.
calculate the magnitude of the magnetic field at the center of the solenoid in teslas.
8652.36857143 x molecules
We need a lot of assumptions in this case.
1. We don't know the mass of water that was present in Archimedes' bath tub that day.
2. Since it recycles, we don't know the total mass of water present on earth.
Assuming the total mass of water on earth is 1.4 × tonnes;
converting tonnes to kgs -->> 1.4 × kg
Since only 2.5% of this is fresh, (the rest is saline and ocean-based)
-->> 2.5% of 1.4 × kg = 0.035 × kg
An average bath tub holds about 80 gallons of water.
80 gallons to kgs = 302.8329 kg
Using Avogadro's number,
we have about 6 × molecules in 18g of water;
1kg of water would contain about 3.3 × molecules.
An average water can holds about 355mL of fluid.
Therefore the number of molecules in the can is .
The number of bathtub molecules present in the can is;
302.8329 x / 0.035 x
= 8652.36857143 x molecules