drJon

When the half-life of uranium U232 92 for 74 years . What is the percentage remaining after 10 years ?

Iron wreck temperature 30 oC fed into the electric furnace , 20 minutes later the temperature to 150 ° C . when the casting temperature 1200 o C , how long the iron melting process in an electric furnace in the air at the time when tempelatur 270C .

The object weighing 20 N is hung on the bottom of the spiral spring , so that stretch as far as 9.8 cm after a state of balance , the weight pulled down as far as 5 cm , measured from idle after burdened . Find the equation of motion generated assuming no...