Derive wave equation for circularly and elliptically polarised electromagnetic waves also define poynting vector​

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?