Plutonium-236 is an alpha emitter with a half-life of 2.86 years. If a sample initially contains 2.35mg of Pu-236, what mass of Pu-236 is
present after 10 years?
a. 0.228mg
b. 0.208mg
c.0.198mg
d. 0.188mg

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?

What causes most sediment to wash or fall into a river