What element would be formed by Protactinium ( 231 Pa ) undergoing 3 beta decays and 5 alpha decays?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

Ionic compounds can be readily dissolved in water because the high dielectric constant of water screens and decreases the force between the oppositely charged ions.