Do the conduction electrons in a copper wire act quantum mechanically or not? roughly speaking, quantum mechanics comes in when the de broglie wavelength of an electron is comparable to or longer than the spacing between atoms. the lattice constant (roughly the spacing between atoms in a crystal) for copper is about 4 x 10-10 m. the drift velocity of electrons is typically less than 102 m/s under household conditions (b) what about atoms in the interstellar medium? here we want to compare the average spacing between atoms (they move! ) to the de broglie wavelength of an atom. the interstellar medium is mostly hydrogen at an average density of order 1/cm3 and temperature about 3 k. in this case you' need the thermody- namic resul p/(2m)(3/2)kt, where k is boltzmann's constant (c) now let's switch gears to talk abou the uncertainty principle when ligo detects gravitational waves, it is measuring displacements of its test masses of order 10-18 m. the test masses are about 40 kg. what is the minimum uncertainty induced in the velocities of the test masses?

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:

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation