In a little league baseball game, the 145 g ball enters the strike zone with a speed of 17.0 m/s . the batter hits the ball, and it leaves his bat with a speed of 25.0 m/s in exactly the opposite direction. what is the magnitude of the impulse delivered by the bat to the ball? if the bat is in contact with the ball for 1.0 ms , what is the magnitude of the average force exerted by the bat on the ball?

impulse = 6.09 kg m/s

Force = 6090 N

Explanation:

As we know that the impulse is defined as the change in momentum of the ball

so here we will have

now we know that

initial speed is given as

now impulse is given as

Now we also know that average force is defined as the rate of change in momentum

so we have

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: