# physics things to know

 resistors in series R1 +R2 resistors in parallel 1/R1+1/R2=1/Req I and V in series and parallel V constant in parallelI constant in series capcitors in parallel C1+C2 capacitors in series 1/C1 +1/C2=1/Ceq concave MIRROR and mirror eqn image in front of mirror+ focal length- m (inverted image)+ i (real image). can also be -i (virtual) convex MIRROR - focal length+ m (upright)- i (virtual) converging LENS behaves like convex mirror+ focal length+ or - i (real images on opp side of the lens, + i) diverging lens behaves like concave mirror- focal length- i myopia near sightednesshigh lens power cus it refracts light more and thus makes it intersect before retinafixed with diverging lens hyperopia + presbyopia far sightedness and inability to accommodateweak lens power cus light not refracting enough to intersect at retina, needs larger distancefixed w converging lens photoelectric effect light intensity intensity is like current. depends on number of photons. more photons is more intensity photoelectric effect light freq freq chances the energy so higher photon freq means more energy stopping voltage voltage where circuit cuts cus its the max KE that an electron can escape with wout hitting the negative platedepends on freq of photons photoelectric effect EM radiation hits a metal and it ejects electron if it hits it w energy that exceeds the metal's work function ideal fluid flow fluid incompressiblenegligble viscosity (friction)flow is laminar (smooth, straight line)flow rate constant isobaric process constant pressure isochoric constant volumew=o isothermal constant tempq=w adiabatic just work done no heat transfer cus system insulated moment of inertia higher when mass is distributed further from radius so object moves slowerfurther away object is, greater its inertia so slowerI=mr^2T=Ia elastic collision KE conservedif same mass, all vel of 1 goes to vel of other if other is stationary inelastic KE not conserved perfectly inelastic KE not conservedobjects stick tgth after total internal reflection when incident angle greater than critical angle. no refraction just reflectlight has to be enterning a medium w lower n n2 >n1 light refracts twds the normal Authorjhox ID352097 Card Setphysics things to know Descriptionall chapters Updated2020-05-26T22:39:58Z Show Answers