Atypical radius for a raindrop is 2.0mm. modelling the raindrop as a thin double-convex lens with radii of curvature |r| = 2.0mm, compute the focal length of the lens. water has an index of refraction of 4/3. select one of the following: (a) 0 (b) 1mm (c) 2mm (d) 3mm

Avalue that describes how heavy an object is and is related to the force of gravity is

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.