Adiffraction grating that has 4500 lines/cm is illuminated by light that has a single wavelength. if a second order maximum is observed at an angle of 42° with respect to the central maximum, what is the wavelength of this light?

Heterogeneous mixture with larger particles that never settle is

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions

If the pressure in a gas is doubled while its volume is held constant. true or false