Chemistry, 09.11.2020 16:20, Kkampudiaa
Suppose that a piece of polystyrene insulation board has a thermal conductivity of k= 0.04 W/m⋅K. In comparison copper has a thermal conductivity of about 400 W/m⋅K. If you want to make a wall of copper that provides the same insulation as a 4-cm polystyrene board, how thick does the copper wall have to be (in meters)? ANY HELP WITH THIS WOULD BE APPRETIATED (PLEASE INCLUDE WORK IF NEEDED)
Answers: 2
Chemistry, 22.06.2019 08:00, wizz4865
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
Chemistry, 22.06.2019 13:00, carlinryan
16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.
Answers: 2
Suppose that a piece of polystyrene insulation board has a thermal conductivity of k= 0.04 W/m⋅K. In...
Mathematics, 26.04.2021 06:50
Mathematics, 26.04.2021 06:50
Mathematics, 26.04.2021 06:50
Mathematics, 26.04.2021 06:50
Mathematics, 26.04.2021 06:50
Mathematics, 26.04.2021 06:50
Mathematics, 26.04.2021 06:50