How does the number of protons in the nucleus affect the number of neutrons in the nucleus? independent variable dependent variable

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?