Joan ties a rope to a tree, she stands 10 m away, and vibrates the rope up and down with 30 complete cycles in 5 seconds. She observes 5 crests on the vibrating rope, and the vertical displacement between the anti-nodes is 0.4 m. Determine the amplitude, period, wavelength, and speed.​

Sex cells from female reproductive organ? 1) mitosis 2) fertilization 3) zygote 4) eggs 5) meiosis 6) sperm

Which of these conditions most likely produces an unstable isotope?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.