3. Pencils should not be used inside the computer to change the setting of switches or to and
pry off jumpers because the tip contains lead which can act as a
may damage the computer Components.

True

Explanation:

Pencils indeed should not be used as tools when working inside a computer because it is made of Lead.

Lead is a conductor of electricity and as such if it is left inside the computer at even miniscule quantities, it can redirect electricity and damage components in the process.

If one wants to work inside a computer, it is best to use tools like tweezers and needle-nose pliers.

A wavelength is characterized by the formula: W=U/F

You want to take your velocity and divide it by your frequency:

W= 123m/s / 230 Hz

Your answer will be:

.5348 (and your units depending on what units it is)