Physics, 21.05.2020 04:58 justice808
What is the correct composition of the universe, based on theoretical and cosmological observations?
dark energy
dark matter
normal matter
5 percent
68 percent
27 percent
match them
Answers: 2
Physics, 21.06.2019 15:30
Galileo was the first to notice that the moon has craters, valleys, and mountains. how might this have changed people's perception of the moon at the time?
Answers: 1
Physics, 22.06.2019 13:00
The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 Β°c, what is the final temperature? note that 1 lb = 453.6 g.
Answers: 3
Physics, 22.06.2019 14:00
Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
Answers: 1
Physics, 22.06.2019 15:50
How many neutrons does plutonium -196 with an atomic number of 78.
Answers: 3
What is the correct composition of the universe, based on theoretical and cosmological observations?...
History, 21.07.2019 16:00
Chemistry, 21.07.2019 16:00
Computers and Technology, 21.07.2019 16:00
English, 21.07.2019 16:00
Mathematics, 21.07.2019 16:00
Mathematics, 21.07.2019 16:00
Mathematics, 21.07.2019 16:00
Mathematics, 21.07.2019 16:00
Mathematics, 21.07.2019 16:00
History, 21.07.2019 16:00
History, 21.07.2019 16:00