Burning of sugar substance solubility in 100 ml water density (g/ml) melting point (°c) sugar 200 g 1.2 185 oxygen 0.9 mg -218.4 product 1 0.16 mg -56 product 2 0.17 g 1.0 0 from the data table, describe how you know a chemical reaction took place between sugar and oxygen. a) the solubility decreased. b) the density was not available on one of the reactants. c) because sugar will dissolve in water and change the solubility. d) the chemical and physical properties of the products do not match the properties of the reactants.

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Determine the maximum r-value of the polar equation r =3+3 cos 0