Acoin completes 18 spins in 12 seconds. the centripetal acceleration of the edge of the coin is 2.2 m/s2. the radius of the coin is

0.025 m

Explanation:

The coin completes 18 revolutions in 12 seconds. The angular velocity of the coin is:

The centripetal acceleration of the edge of the coin is given by

where we have

a = 2.2 m/s^2 is the acceleration

r is the radius of the coin

Solving for r, we find

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:

c)as speed changes, wavelength and frequency change.

everything changes!