When is equilibrium reached? . a-when supply is greater than demand. b-when demand equals supply. c-when supply is less than demand. d-when demand and supply both change.

Option (B) is the correct answer.

Explanation:

Equilibrium is defined as the state where demand and supply are equal to each other.

For example, a shopkeeper had 100 goods and all of them got sold in two days. Rest of the goods were kept by the shopkeeper in stock.

Hence, it shows that the shopkeeper has fulfilled the demand of customers by supplying them the goods.

Therefore, we can conclude that when demand equals supply then it means an equilibrium has reached.

its c its is a mixture of gases

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.

explanation: