Frequency= speed/ wavelength
f= 3.0 × 10^8 m/s/ <span>3.5 × 10^-9 m
=8.57x10^16
The answer is letter </span><span>B. 8.57 × 10^16 Hz.</span>
Toward the center of the circle
The final motion characteristic for an object undergoing uniform circular motion is the net force. The net force acting upon such an object is directed towards the center of the circle. The net force is said to be an inward or centripetal force.
Figure 1, because it is a compound.
You need to find speed, v.
And you (should) recognize the famous F=ma.
We've got data for F and m, so we can find a first!

a = 95N / 0.082 kg
Now from a we nees to find v. But how is v and a related?

where dv is the change in speed (some unknown v minus zero since arrow is initially at rest). dx is the distance where the arrow experiences a force (77 cm!).
Now you know values for a, dv, and dx... you can plug those in and find v!