Here are mass spectrometric signals for methane in h2. ch4 (vol %): 0 0.062 0.122 0.245 0.486 0.971 1.921 signal (mv): 9.1 47.5 95.6 193.8 387.5 812.5 1671.9 (a) subtract the blank value (9.1) from all other values. then use the method of least squares to find the slope and intercept and their uncertainties. slope intercept * construct a calibration curve. (do this on paper. your instructor may ask you to turn in this work.) (b) replicate measurements of an unknown gave 152.1, 154.9, 153.9, and 153.6 mv, and a blank gave 9.5, 9.4, 10.6, and 8.4 mv. subtract the average blank from the average unknown to find the average corrected signal for the unknown. (c) find the concentration of the unknown and its uncertainty. vol%

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Many bird species build nests in which they raise their offspring. one of these species is known as the magnolia warbler. breeding pairs of magnolia warblers build nests out of pieces of grass and twigs. the female warbler will then lay her eggs in the nest and sit on the eggs for a few weeks until they hatch. after the offspring have hatched, the female will continue to sit on the newborn chicks to keep them warm. both the male and the female bring food for the offspring to eat until the young are mature enough to find food on their own. which of these most likely describes why birds such as the magnolia warbler build nests in which to raise their offspring? a. nest building decreases the amount of energy used by the parent birds to raise their offspring to adulthood. b. nest building increases the probability that the offspring will survive and eventually produce offspring of their own. c. nest building decreases the amount of food that the offspring require the adult birds to provide. d. nest building increases the probability of the offspring being located by airborne predators.