The half-life of hydrogen-3 (tritium) is approximately 12 years. in how many years will half of a 20-gram sample decay by beta radiation to helium-3?

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

It can take some of those large , industrial vehicles up to feet to stop when traveling only 60 mph, and therefore , you shoukd be mindful to not be jn the traffic right in front of them a. 100 feet b. 200 feet c. 335 feet d. 425 feet