VITETE EETLE 1. An experiment was carried out to determine the effects of two different variables on reaction
rate when solid calcium carbonate is combined with liquid dihydrogen monoxide. The reaction
was carried out multiple times and each trial used the exact same proportions of both
chemicals. The tables below show the data collected during the experiment. The dependent
variable measured was time for the reaction to finish.
Average Size
of CaCO3
Size Time
Trial 1 2.Ocm 1205
Trial 2 1.5cm 100s
Trial 3 1.0cm 904
Trial 40.5cm 855
Temperature of
Reaction
Temp
Time
Trial 1 35°C 1205
Trial 2 45°C 1145
Trial 3 55°C 1035
Trial 4
65°C
945
Which of the variables tested had the largest impact on increasing the speed of the reaction?
A. The smallest average size of CaCO3.
B. The largest average size of CaCO3
C. The coolest temperature.
D. The warmest temperature.

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.