What is the speed of a wave that has a frequency of 110 Hz and a wavelength
of 0.21 m?

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

In which layer do organisms on earth love?