A sample of Argon-39 had an initial mass of 1.00 kg. After 150 years, the same sample has a mass of 0.6795 kg. What is the half life or argon 39?

If jesus walked on water, does that mean he swims on land

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph