An element has a density of 19.5 g/cm3. What is the radius of a sphere that has a mass of 60 kg of this material?

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.