A 25 kg rock is perched 20m above a road. How much potential energy
does it have?...
Answers: 3
Physics, 22.06.2019 07:50
The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
Answers: 2
Physics, 22.06.2019 11:30
Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)
Answers: 3
Physics, 22.06.2019 16:30
Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?
Answers: 2
Mathematics, 21.07.2019 18:30
Chemistry, 21.07.2019 18:30
Biology, 21.07.2019 18:30
Biology, 21.07.2019 18:30
Physics, 21.07.2019 18:30
Mathematics, 21.07.2019 18:30
History, 21.07.2019 18:30
Health, 21.07.2019 18:30
Mathematics, 21.07.2019 18:30
Mathematics, 21.07.2019 18:30
Health, 21.07.2019 18:30