What does this poem mean: A lake in the spring
Is a marvellous thing
Changes are on the way
The winter chills cease
with sunlight’s increase.
Cool waters cover the bay.
Water moves round
From surface to ground
Water is mixed this way
Spring storms bring rain
Lake water does gain
With nutrients caught in the fray
Tiny creatures abound
‘Cause algae’s around
The food chain is boosted this way.

the poem seems to be about the seasons transitioning from winter to spring. the poet explains the lake melting, the sunlight coming out, spring storms that add water to the lakes, and the creatures that come back to roam after winter comes to an end. im really sorry if that didnt help.

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:

i believe the answer would be:

d. violin, clarinet, french horn, and tuba