What value in dB if the ratio of pressure P1=500 uPa relative to pressure P2=50uPa?

Determine the maximum r-value of the polar equation r =3+3 cos 0

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery