What is the wavelength of a wave that has a frequency of 1.5 HZ and travels at 300,000 km/s

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)

The heliocentric and the geocentric models of the solar system included these central principles

Distinguish between linear momentum and angular momentum