A toy car travels at 9.2 m/s. The car travels a distance of 27.9 m. How long did it take to travel that distance?

Could someone . i have tried to solve myself but my calculation is off

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.