4. Which phase of biotechnology product development often involves testing in live animals? A. Phase 4 trials
B. Preclinical trials
C. Phase 2 and Phase 3 trials
D. Phase 1 and Phase 2 trials

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.

Two lasers are shining on a double slit, with slit separation d. laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. the lasers produce separate interference patterns on a screen a distance 5.30 m away from the slits. part a which laser has its first maximum closer to the central maximum? view available hint(s) which laser has its first maximum closer to the central maximum? laser 1 laser 2

You are learning about energy transformations in science class. sally's group made this electromagnet using a battery and some wire. describe the energy transformation you see here. a) electrical to magnetic b) magnetic to electrical c) mechanical to magnetic eliminate d) electrical to chemical