For non-ideal oscillators (such as a real pendulum) energy is lost and the amplitude (which is the maximum displacement) is no longer constant but also decreases with time. How fast the energy lost is described by a TIME CONSTANT, τ = m/b. Typically after ONE time constant has elapsed, the system has ...(hint: this is when t = τ)

Question

For non-ideal oscillators (such as a real pendulum) energy is lost and the amplitude (which is the maximum displacement) is no longer constant but also decreases with time. How fast the energy lost is described by a TIME CONSTANT, τ = m/b. Typically after ONE time constant has elapsed, the system has ...(hint: this is when t = τ) 
a)LOST half of its initial energy. 
b)LOST 63% of its initial energy.
c)LOST 13% of its initial energy.
d)LOST 37% of its initial energy.
Thank you!

Jay rome · Answer

B) LOST 63% of its initial energy. I just saw this on my webassign