Assume you are driving 20 mph on a straight road. also, assume that at a speed of 20 miles per hour, it takes 100 feet to stop. if you were to increase your speed to 60 miles per hour, your stopping distance is now:

900  feet

Explanation:

Given

Velocity

it take 100 feet to stop

Using Equation of motion

where

v,u=Final and initial velocity

a=acceleration

s=distance moved

When velocity is 60 mph

s=900.08 feet

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: