A13-m^3 rigid tank contains nitrogen at 17°c and 600 kpa. some nitrogen is allowed to escape until the pressure in the tank drops to 400 kpa. if the temperature at this point is 15°c, determine the amount of nitrogen (kg) that has escaped.

Aparticle moves along a straight line such that its acceleration is a=(4t^2-2) m/s, where t is in seconds. when t = 0, the particle is located 2 m to the left of the origin, and when t = 2, it is 20 m to the left of the origin. determine the position of the particle when t=4s.