Q: The variable is the speed of light. for the relationship to hold mathematically, if the speed of light is used in m/s, the wavelength must be in meters and the frequency in what?    Choices:  - gigawatts  - miles  - centimeters  - hertz  A:
hertz

Q: What is the more common term for ethanoic acid, the active substance in vinegar?    Choices:  - methyl acid  - amino acid  - polymer acid  - acetic acid  A:
acetic acid

Q: What is a controlled scientific test that often takes place in a lab?    Choices:  - a testing  - a viewing  - an observeration  - an experiment  A:

an experiment