A uranium nucleus (mass 238 units) at rest decays into two particles, a helium nucleus (mass 4.0 units) and a thorium nucleus (mass 234 units). If the speed of the helium nucleus is 6.0  105 m/s, what is the speed of the thorium nucleus?

Explanation:

We are given that

Mass of uranium,

Initial velocity,u=0

Mass of helium nucleus,

Mass of thorium,

Speed of helium nucleus,

We have to find the speed of the thorium nucleus.

According to law  of conservation of momentum

Initial momentum=Final momentum

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.