Sports: Reaction time measures how quickly a runner reacts to the starter pistol. In the 100 m dash at the 2004 Olympic Games, Lauryn Williams had a reaction time of 0.214 second. Her total race time, including reaction time, was 11.03 seconds. How long did it take her to run the actual distance?

A first order reaction is 75% completed in 100 minutes. How long time will it take for its 87.5% completion?

A second order reaction in which in both the reactants have same conentratio, is 20% completed in 500 seconds. How much time it will take for 60% completion?

The rate constant fro a second order reaction is 8 xx 10^(-5) M^(-1) "min"^(-1) . How long will in take a 1 M solution to be reduced to 0.5 M

For the reaction R rarr P , the concentration of reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction rate of reaction using units of time both in minutes and seconds.

When a ball is allowed to fall, the time it takes to fall any distance varies as the square root of the distance and it takes 4 seconds to fall 78.40 m. How long would it take to fall 122.50 m ?

Two thin rectangular sheets (0.20 m xx 0.40 m) are identical. In the first sheet the axis of rotation lies along the 0.20-m side, and in the second it lies along the 0.40-m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final angular velocity in 8.0 s. How long does it take for the second sheet, starting from rest, to reach the same angular velocity?

A first order reaction has a rate constant of 15 xx 10^(-3) s^(-1) . How long will 5.0 g of this reaction take to reduce to 3.0 g ?