Need help with my automotive class, if you can help please interact with this so I can show the picture !

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

What is a monomer? how do they form a ploymer from the view point of chemical bonding?