What percentage of a radioactive species would be found as daughter material after five half-lives? 50% 25% 15% 12.5% 3.125%

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

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?