To find the acceleration of a glider moving down a sloping air track, you measure its velocities (v1 and v2) at two points and the time t it takes between them, as follows: v1=0.21+/- 0.05m/s, v2=0.85 +/- 0.05m/s, t=8.0 +/- 0.1sa) assuming all uncertainties are independent and random, find the average acceleration, a=(v2-v1)/t , and its uncertainty. b) how well does your result in part (a) agree with your friends theoretical prediction that a=0.13 +/- 0.01m/s^2.

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

Work = force × a. work b. energy c. distance d. momentum

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1