Sasha is interviewing people for a study he is doing. before he starts the interview, sasha explains the purpose of the study and how the information will be used, what is this preliminary step called?
a. seeking social influences
b. making research data with consensus opinion
c. setting up a hypothesis
d obtaining informed consent

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

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system

Use the illustration to describe how the electromagnetic spectrum changes as its frequency moves from radio waves to higher energy gamma waves in terms of wavelength and amplitude.