In designing an experiment, O you should not change any factors because that will create changes in your data.
O you should change as many factors as possible to measure the biggest change.
O it is important to only change one factor at a time so you can isolate the effect of the factor.

i wanna say it’s between b and d, leaning more towards b.

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

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: