Physics, 27.06.2019 17:30, ronnie7898
Most of the world’s energy supply comes from burning fossil fuels. fossil fuels are nonrenewable resources. if people continue to burn fossil fuels at the same rate, which of the following events will most likely happen? a. all of the world’s fossil fuel reserves will be used up. b. fossil fuels will quickly reform underneath the ocean’s floor. c. no changes will be made to the world’s fossil fuel reserves. d. fossil fuel deposits will be found on the moon.
Answers: 1
Physics, 22.06.2019 10:00, amyaacrawford86
Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.
Answers: 1
Physics, 22.06.2019 22:00, natalie2sheffield
Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?
Answers: 1
Physics, 23.06.2019 09:00, meandmycousinmagic
Why did thomson's results from experimenting with cathode rays cause a big change in specific thought about atoms ?
Answers: 2
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