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A bullet is fired vertically upward (don't) with a muzzle velocity of 671.ft/s.
a) when does if reach max altitude?
b) what is that max altitude (above the gun)?
c) when does it return to hit the gun (or stupid sportsman)?
Compute the horizontal range, on level ground, for a projectile with initial speed 35.0m/s and initial inclination 75.00 from the horizontal.
a pickup truck accelerates 3.25m/s2 from rest, for 5.80 s. find it's final speed.
determine the precision of these two approximate values:
a) 3000. ft
b) 1.20 times 10(--5)ms
be careful, first write in std.dec.form
- A gas system with constant pressure has change in internal energy of 240 J. Heat was lost to the surroundings and 150 J work was done to the surroundings as well. How many calories of heat was lost?
Given an array A of N integers and two integers X and Y, find the number of integers in the array that are both less than or equal to X and divisible by Y
Question 2
The silver concentration in a sample of photographic waste was determined by AAS. Table 3 shows the results obtained. Is the calibration data linear? Plot the calibration curve. [25 Marks]
Table 3: Determination of silver concentration by AAS
Added Ag: µg added per ml of original solution 0 5 10 15 20 25 30
Absorbance 0.32 0.41 0.52 0.60 0.70 0.77 0.89
convert 7.1cm to inches using 1 in =2.54cm
Question 1
Table 2 gives the recovery of bromide from spiked samples of vegetable matter, measured by Gas-liquid chromatographic method. The same amount of bromide was added to each specimen.
Table 2: Recovery of bromide from spiked samples of vegetable matter
Tomato 777 790 759 790 770 758 764
Cucumber 782 773 778 765 789 797 782
a) Test whether the recoveries from the two vegetables have variances which differ significantly. [10 Marks]
b) Test whether the mean recovery rates differ significantly.
Calculate the Kc of the reaction below if the equilibrium concentrations of Ag and IO3 are both 1.78×10-⁴M
