What is the product of the second alpha decay in this series?

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)

What 2 properties are used to classify radiation