Assume that reactions are independent. What is the mean of the number of reactions until the first final temperature is less than 272k? report answer to 3 decimal places.

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Distinguish between linear momentum and angular momentum