Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Elizabeth
A spherical raindrop 3.1 mm in diameter falls through a vertical distance of 4200 m.?
Take the cross-sectional area of a raindrop = πr2, drag coefficient = 0.45, density of water to be 1000 kg/m3, and density of air to be 1.2 kg/m3.
(a) Calculate the speed (in m/s) a spherical raindrop would achieve falling from 4200 m in the absence of air drag.
m/s
(b) What would its speed (in m/s) be at the end of 4200 m when there is air drag?
m/s
2 AnswersPhysics3 years agoTo maintain a constant speed, the force provided by a car's engine must equal the drag force plus the force of friction of the road.?
The density of air is 1.2 kg/m3.
(a What are the drag forces in newtons at 77 km/h and 104 km/h for a Toyota Camry?
(Drag area = 0.70 m2 and drag coefficient = 0.28.)
at 77 km/h
at 104 km/h
(b) What are the drag forces in newtons at 77 km/h and at 104 km/h for a Hummer H2?
(Drag area = 2.44 m2 and drag coefficient = 0.57.)
at 77 km/h
at 104 km/h
2 AnswersPhysics3 years agoWhat is incorrect about this molecular formula AsRb3?
2 AnswersChemistry3 years agoA radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1MHz=106Hz and 1Hz=1s−1.?
Calculate the broadcast wavelength of the radio station 102.5 FM.
1 AnswerChemistry4 years ago
