A particle is describing uniform circular motion in the anti-clockwise sense such that its time period of revolution is T. At t = 0 the particle is observed to be at A. If [{MathJax fullWidth='false' B_1 }] be the angle between acceleration at t = T/4 and average velocity in the time interval 0 - T/4 and [{MathJax fullWidth='false' B_2 }] be the angle b/w acceleration at t = T/4 and the change in velocity in the time interval 0-T/4, then the value of [{MathJax fullWidth='false' B_1 }] and [{MathJax fullWidth='false' B_2 }] are?

Here the angle between the acceleration and average velocity is 135 degrees and angle between acceleration and difference in velocity will be 45 degrees.

Explanation:

We know that the average velocity in the time interval from 0 to  is ratio of total change in displacement to total time taken .  

 The direction of average velocity will be along the - .

 The direction of acceleration will be along the radius towards center .

 So the angle between average velocity and acceleration in given time interval will be 135 degrees .

     The direction of velocity vector is perpendicular to the position vector of given points , so the difference in velocity vectors will be in opposite direction of   - so the angle between acceleration vector and difference in velocity vector will be 45 degrees .

answer: what are you talking about?

explanation:

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: