The formula to calculate population density is
a. land area + number of populations
b. number of populations - land area
c. number of organisphs in a region + land area
d. land area number of organisms in a region
select the best answer from the choices provided

The particles of an ice cube at 0°c (represented by the blue circles) come in contact with the particles of juan’s hand at 37°c (represented by the orange circles). which diagram correctly represents the temperature of the two substances and the direction of heat flow?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?