Which of the following is best used to decrease the amount of work required to push the wheelchair up the ramp ?
a. decrease the angle of the inclined plane
b. double the length of the inclined plane
c. increase the angle of the inclined plane
d. increase the mass of the wheelchair

The reaction: (ch3)3cbr + oh− → (ch3)3coh + br− in a certain solvent is first order with respect to oh−. in several experiments, the rate constant k was determined at different temperatures. a plot of ln(k) vs 1/t was constructed and the slope of the line was -1.10 x 104 k with a y-intercept of 33.5. what is the value for k at a temperature of 25°c?