Wildlife Biologists studying orcas (killer whales) are following the ocean currents. One of the currents is stalling the orcas. It has a circular rotation and has a radius of 0.25 km. What is the area that particular circle spans?

A=∏r2

What filament and tubules give a cell its shape

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull