URGENT!! I need help with these questions ASAP. Please show work and please do not just write random stuff and collect points I have put this same thing up 5 times because of that :/

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.