An enzyme with a km of 1.2x10-4 m was assayed at an initial sustrate concentration of 0.02 m. by 30 seconds, 2.7 μmoles/liter of product had been produced. how much product will be present at (a) 3 min and (b) 5.3 minutes? (c) what percent of the original substrate is used up at (c) 3 min and (d) 5.3 minutes?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?