The half-life of1 is 8.04 days. (a) calculate the decay constant for this isotope. (b) find the number of 1311 nuclei necessary to of 0.5 uci produce a sample with an activity

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.