Name the physical quantity measured by the slope of the velocity time graph for uniform motion

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

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m