Acar is moving 60 km/h when the driver sees a signal light 40 m ahead turn red. the car can slow with an acceleration at the -.5g, where g is 9.8 m/s^2. what was her stopping distance? assume zero reaction time. you should convert 60 km/h to m/s.

28.34m

Explanation:

initial velocity = 50/3 m/s (U)

final velocity= 0 (V)

acceleration= -4.9 m/s^2 (A)

S= V^2-U^2/2A

S= 28.34m

im not to sure what 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: