Zeke's car had an initial velocity os 12 m/sec slows down to 2 m/sec in 4.5 seconds. What is the acceleration of Zeke's car? *

Explanation:

the information we have is:

initial velocity:

final velocity:

and the time:

We need to find the acceleration of the car.

For this we use formula to calculate the acceleration given the information we were given:

acceleration is equal to the difference between the final velocity and the initial velocity divided by time.

We substitute all the known values:

the acceleration is

the result is negative because the car is slowing down.

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: