A 1.00-g sample of natural samarium emits α particles at arate of 120 s-1 due to the presence of The naturalabundance of is 15%. Calculate the half-life for thisdecay process.

Lectures 1 2 and 3 Average Speed & Average Velocity vavgdistancetime=dt *speed is a scalar (magnitude with no direction vavgdisplacementtime= rt * velocity is a vector (has direction) → UNITS: ms vavg and r point in direction of motion vx= xf-x0t → xf=x0+t(vx) *with constant velocity Negative slope = negative...