What is the relationship between active transport and diffusion?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m