a convex mirror
They are both made of a transparent medium with a refractive index > 1.Both have one or two sides possessing a curvature which, combined with their refractive properties, causes light rays to be deflected(convex ()> ) or (concave )(< )
Convex ~
The lens of the eye is biconvex (convex on both sides).
a convex lens
pressure test the coolant system you will find a blown intake or head gasket
a convex mirror
Excessive wear, or lack of oil. Or both. Generally lack of oil is what causes the excessive wear.
A convex mirror
Excessive revving of an engine causes overpressure in the crankcase. It causes unhealthy expansion in the pistons and the valves.
The head of the humerus is laterally and medially convex. The medial convexity fits into the glenoid fossa, and the lateral convexity, the lesser tuberosity, provides a site for muscle attachment.
The foods you eat.
No
Excessive water intake and excessive caffeine will cause GI distress.
Yes Hypotension often causes excessive sleep. Excessive sleep often causes puffiness of the face.
Ask your Sociology teacher.....
Excessive speed is one of the causes.