One kind of potential energy is elastic potential energy. this is the kind of energy present in a rubber band that is stretched. when the rubber band is released, the elastic potential energy is converted to kinetic energy. elastic potential energy is also present in a muscle that is contracted, or tensed.

the diaphragm is a large muscle that is used to breathe. contracting the diaphragm causes air to move into the lungs. when the diaphragm is relaxed, air moves out of the lungs as is converted to kinetic energy.
a.
chemical potential energy
b.
light energy
c.
elastic potential energy
d.
heat energy

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

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.

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?