Plutonium -241 is an isotope of plutonium that is highly radioactive and is used in some nuclear reactors and many nuclear weapons . It has a half -life of 14.4 years . If 1000g of Pu - 241 is placed in storage at a weapons plant , how much will still be remaining after 28.8 years ? A. 125g
B. 250g
C. 500g
D. 1000g

The Answer is B I just did it

If anyone who can me with this hw? i would really appreciate it

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?