True or false in a longitudinal wave the matter in the medium moves back-and-forth at right angles to the direction of the wave travels

False! Matter moves in fact back and forth just like for sound in fact, but parallel to the direction of propagation.  Perpendicular deformation will be for transversal waves!

answer: 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: