6questions:
what percentage of the earth is covered by water?
did dinosaur...
6questions:
what percentage of the earth is covered by water?
did dinosaurs and humans ever exist at the same time?
what is darwin's theory of the origin of species?
why is the sky blue?
what causes a rainbow?
why does a year consist of 365 days and a day of 24 hours?
Answers: 1
Physics, 21.06.2019 16:10
In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer
Answers: 1
Physics, 22.06.2019 15:30
Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.
Answers: 2
Physics, 22.06.2019 17:30
This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.
Answers: 1
Computers and Technology, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50
Physics, 03.12.2020 05:50
History, 03.12.2020 05:50
English, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50
Mathematics, 03.12.2020 05:50