Sure how many Which of the following is the best reasoning to explain why no one knows
people the Earth can support?
We do not know how much space is left on Earth, so we cannot predict how many people the Earth can
Support
DAll people do not use resources at the same rate and if those rates change, the number of people the Earth
Can support also changed.
We do not know which variables affects how many people the Earth can support.
All people use resources at the same rate but we do not know how many people will live on Earth in the

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

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

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?