Krishne wants to measure the mass and volume of a thimble. which tools should she use?

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f