Aboat is traveling west at 3.00 m/s across a river that is 68.5m wide. the current is 1.2m/s south. a. calculate the resultant velocity and direction of the boat b. how long does it take to get across the river c. how far down streak does the boat end up

Part a)

here boat is crossing the river at speed 3 m/s towards West

and the river current is flowing at 1.2 m/s towards South

So the net velocity of the boat is vector sum of river flow and boat velocity

Since the two velocity are perpendicular to each other so we will use pythagoras theorem to find the net velocity

direction of the net velocity is given as

so net velocity is 3.23 m/s in direction 68.2 degree West of south.

B) time taken to cross the river will be given as

c) the distance covered by the boat in the direction of stream will be given as

so it will cover a total distance of 27.4 m along the stream

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:

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.