A car moving at a speed of 60km/hr reaches its destination in 2 hours. Find the time taken if the car moves at a speed of 100km/hr.

New time taken = 1.2 hour

New time taken = 1 hour 12 minutes

Explanation:

Given:

Old speed of car = 60 km/h

Time taken = 2 Hour

New speed of car = 100 km/h

Find:

New time taken

Computation:

Distance = Speed x time

So.

Old speed of car x Time taken = New speed of car x New time taken

60 x 2 = 100 x New time taken

New time taken = 1.2 hour

or

New time taken = 1 hour 12 minutes

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:

hasty generalization