Apendulum and a block hanging at the end of a spring are both carefully adjusted to make one vibration per second while on the earth's surface. will the period of vibration of the pendulum or of the block on a spring be affected if they are moved to the moon?

For  the pendulum , yes and for the spring ,No

Explanation:

We will examine the two cases,

For pendulum;

we see that for a pendulum, the period depends on the gravitational acceleration of the region it is. so the period for earth will differ compared to that of the moon.

For a spring;

form the equation above is obvious that the period of a spring in vibration is independent of gravitational acceleration of the region it is.

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: