The students continued their experiments with chi electrostatics. Joe and Lashonda each blew up a balloon and then
rubbed their dry hair with the inflated balloons. While they did this
the other students notice that their hair was starting to stick straight
out. Next they tied a string to their balloons and let them dangle next
to each other. Predict what will happen.
A)
The balloons will separate because friction has given
each an overall negative charge.
B)
The balloons will move together because the
balloons have gained charge from friction.
C)
The balloons will attract each other because one is
positive and the other is negative.
The balloons have each gained positive charge from
D) friction and like charges attract so they will come
together

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?

Many bird species build nests in which they raise their offspring. one of these species is known as the magnolia warbler. breeding pairs of magnolia warblers build nests out of pieces of grass and twigs. the female warbler will then lay her eggs in the nest and sit on the eggs for a few weeks until they hatch. after the offspring have hatched, the female will continue to sit on the newborn chicks to keep them warm. both the male and the female bring food for the offspring to eat until the young are mature enough to find food on their own. which of these most likely describes why birds such as the magnolia warbler build nests in which to raise their offspring? a. nest building decreases the amount of energy used by the parent birds to raise their offspring to adulthood. b. nest building increases the probability that the offspring will survive and eventually produce offspring of their own. c. nest building decreases the amount of food that the offspring require the adult birds to provide. d. nest building increases the probability of the offspring being located by airborne predators.