34. A chain of hamburger restaurants advertises that it has sold more than 50 billion hamburgers over the
years. Estimate how many pounds of hamburger
meat must have been used by the restaurant chain
to make 50 billion hamburgers and how many head
of cattle were required to furnish the meat for these
hamburgers.

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by