As a stands, her entire weight is momentarily placed on the heels of her high-heeled shoes. calculate the pressure exerted on the floor by the heels if the heels are circular with a radius of 0.578 cm, and the woman’s mass is 65.0 kg. express the pressure in pa.

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)