Lead (pb) concentrations were measured in waterfowl eggshell samples from a location downstream from a paper mill and a location upstream from the paper mill. what analysis would you recommend to test the hypothesis of no difference in mean pb eggshell concentrations versus the alternative that the locations downstream from the paper mill have a higher mean pb concentration?

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b. what is the wavelength of the wave? c. what is the amplitude of the magnetic field? d. what is the intensity of the wave?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge

Which lists the amplitudes of sound waves from these sources in order from greatest to least? busy roadway, kids whispering, average home chainsaw, diesel truck, rustling leaves kids whispering, vacuum cleaner, jet airplane library, conversational speech, music from speaker