Abeam of light has a wavelength of 4.5 × 10^−7
meter in a vacuum. the frequency of this light is
(1) 1.5 × 10^−15 hz (3) 1.4 × 10^2 hz
(2) 4.5 × 10^−7 hz (4) 6.7 × 10^14 hz

Wavelength formula is C=λf or λ=C/f or f = C/λ, so Frequency = Velocity divided by wavelength, where C is the velocity, which is the speed of light: 3.00×108 m/sec

λ is the wavelength in meters
f is the frequency in Hertz (cycles per second)
f=3.00×108msec/4.5x10−7m=6.7x1014Hz

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.