What is the frequency of a photon that has an energy of 7.2 × 10^-16 J ? a) 4.8*10^-49 Hz
b) 9.2*10^-19 Hz
c) 2.4*10^-24 s-1
d) 2.8*10^-10 s-1
e) none of the above

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

i don't know people like to fight everywhere rip.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

you gotta add the following molecules so we can give u an answer

explanation: