The following sulphur isotopic data were obtained for a sulphide ore in mexico.

sample 

34s galena (ga) ‰ 

34 s sphalerite (sp) ‰ t in c

1 -1.15 +0.95

2 -1.11 +0.87

3 -1.42 +1.03

4 -1.71 +0.01

the fractionation, sp-ga, between sphalerite and galena has been found to vary with temperature as:

6

2

sp 1.02 10

ga

x

t

 =

a. calculate the temperature in c at which each mineral pair equilibrated and fill the results in the

table above! (show one example of the calculation procedure here! )

Find an equation for the linear function which has slope -10 and x-intercept -7

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?