27) a 10 kg box is sitting on a shelf 15 feet in the air. how could you increase the potential energy of the box? (check all that apply)
 raise the box to 20 feet.
 lower the box to 10 feet
 increase the mass of the box to 15 kg
 decrease the mass of the box to 5 kg

What are four key elements of the study of economics?

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.