Adamped pendulum has a period of 0.66 s and a time constant of 4.1 s. how many oscillations will this pendulum make before its amplitude has decreased to 20% of its initial amplitude? n=

2.44 oscillation

Explanation:

Damped oscillation equation

Xmax = Aexp(-t/Tc)

Tc=4.1

T=0.66

Xmax= 20% of A = 1/5A

suBstituting into the equation

1/5A= Aexp(-0.66/4.1)

1/5=exp(-0.66/4.1)

In1/5= 1.609

As the period is 0.66, the number of osscillation to gain such amplide is 1.609/0.66

which is 2.44

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation:

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.