A radioactive sample has a half-life of 5.0 min.What fraction of the sample is left after 20 min? 1/2 1/8 1/16 1/4 The f
Posted: Wed Jun 08, 2022 7:32 pm
A radioactive sample has a half-life of 5.0 min.What fraction of
the sample is left after 20 min?
1/2
1/8
1/16
1/4
The focal lenght of a convex lens 100m. What is the power of the
lens?
+1D
-1D
1watt
-1 watt
the sample is left after 20 min?
1/2
1/8
1/16
1/4
The focal lenght of a convex lens 100m. What is the power of the
lens?
+1D
-1D
1watt
-1 watt