Un peso da pesca di 100 g è tenuto in rotazione su un piano orizzontale da un filo di nylon lun-
go 1,2 m. Il pesetto compie un giro in 0,40 s.
Calcola:
• la frequenza del moto;
• l'accelerazione centripeta cui il pesetto è sot-
toposto espressa in unità g. [2,5 Hz; 30 g]​

because growing process had stoped after 4-5 year

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m

i think the answer is bone