Does your speedometer provide information on instantaneous speed or average speed?

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good