Physics, 07.10.2021 01:50, Alizerodriguez2010
An object dropped from a balloon descending at 4 m/s lands on the ground 10 seconds later. What was the altitude of the balloon at the moment the object was dropped?
Answers: 2
Physics, 22.06.2019 02:10, allytrujillo20oy0dib
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
Answers: 2
Physics, 23.06.2019 13:00, ceeejay0621
Does a energy transformation happen when you drop your pencil
Answers: 1
Physics, 23.06.2019 21:40, starsinopoli13
Chemical energy sources are often portable and provide large amounts of energy. fossil fuels are one kind of chemical energy source. most of the energy we use in the united states is generated by the combustion of fossil fuels. however, fossil fuel combustion adds greenhouse gases to the atmosphere, mostly co2. one measure of the total amount of greenhouse gases that are emitted into the atmosphere each year is called a carbon footprint. read this article to compare the carbon footprint of an average person in the united states to an average person around the world. knowing that greenhouse gases are contributing to climate change, how can we reduce our carbon footprint, particularly in the united states? could hydrogen fuel replace fossil fuels in the future? why or why not? should the size of a person’s carbon footprint be limited by law? why or why not?
Answers: 2
An object dropped from a balloon descending at 4 m/s lands on the ground 10 seconds later. What was...
Mathematics, 25.02.2020 02:27