Question

The long bones are hollow and connected by air passages in (1)Reptiles (2)Land vertebrates (3)Aves (4)Mammals

Answer 1

Answer:

Solution :

We know that

hv=hv0+KE

or v0=v-

KE

h

KE=1.3×10-19J,v=5.2×1014s-1,h=6.626×10-34Js

:. Theshold frequency

v0=5.2×1024s-1-

1.3×1019J

6.626×10-34Js

=5.2×1014s-1-1.96×1014s-1

3.24×1014s-1

Answer 2

Answer:

option (2)....

its Land vertebrates.