Answer:
D
Explanation:
Increasing its height to twice its original value
D wavelength
velocity deals w/ speed
frequency/amplitude deals with sound
Answer:

Explanation:
As we know that

here we have


also we know



so we have


so the height above window is given as



Answer:d
Viruses do not have organelles
Explanation
Viruses do not have cells; therefore they do not have organelles. Viruses contain genetic material (DNA or RNA) and a way containing and delivering that genetic material into a cell.