What factor accounts for the fact that egg floats in salt water

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s. calculate eddy’s power rating

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap