Consider a runner traveling with an initial velocity of 1.9 m/s in the positive direction accelerates at a constant rate of 1.2 m/s2 for a time of 3 seconds. what is his velocity at the end of this time?

5.5 m/s

Explanation:

As we are told the runner  accelerates at a constant rate, we can use the following equation:

Where:

is the runner's final velocity

is the runner's initial velocity

is the runner's constant acceleration

is the time it takes the runner to reach the final velocity

Finally:

multiply 2kg by latent heat of vap

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.