Part 1. if an object oscillates 100 time in 50 seconds what will be the frequency and periodic time?

part 2. consider a mass oscillating with simple harmonic motion represented by the equation x=2/5cos[2π t + π ] meters . calculate the amplitude, displacement, speed and acceleration if it completes the motion at a time of 0.7 seconds

Which sound characteristic is not affected by the relative motion of an object

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

What is the role of lenses in microscopy?