The separation between adjacent nodes of standing waves for a given wavelength λ is Question options:

A. λ/8

B. λ/4

C. λ/2

D. 2λ

E. 4λ

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.

D. engine-coolant temperature is the answer : ) =)

I’m not sure about this question