Sunburn is caused by ultraviolet light waves having a frequency of around 10^16 hz. what is their wavelength if the speed of light is 3 x 10^8 m/s? 15 nm 69 cm 45 mm 30 nm

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing

In which of these cases are the two wave points considered to be in phase with each other?

Which statement describes the formation of our sun? a disk formed of long trails of stars coiled into a spiral. it formed an elliptical flattened disk. heat and gases contracted within a nebula. gravity pushed stars away from a center core.