What does the principle of faunal succession state?

Different species of flora and fauna are found in a specific order in the sedimentary rock strata in regard to the geological time they lived in.

Explanation:

The principle or law of faunal succession, proposed by English geologist William Smith, states that different species of both flora and fauna are found in a specific order in the sedimentary rock strata in regard to the geological time they lived in. These fossils follow a succession, that is, they succeed each other vertically.

For example, two organisms that lived during different geological periods, let's say one from the Triassic and the other from the Ordovician, will never be found in the same stratum because they are separated by thousands to millions of years.

This pattern is crucial for paleontologists because it allows them to determine which species inhabited a certain ecosystem during the same geological era or period.

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 think the answer is either c or d

im thinking d might make more sense though

sorry if im wrong