A radioactive isotope has a half-life of 5700. years. Given a 100.0 gram sample of the isotope initially, after a number of years have passed, we find that only 6.250 grams of the original isotope remain.
How many years old is the sample?
a 2.280 x 104 yr
b 1.140 x 104 yr
c 1.710 x 104 yr
d 2.850 x 104 yr

Plz mark brainliest 30 points1) 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?

What is the mass of 0.46 mil of mgcl2

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?