Physics, 30.10.2019 19:31 lashondrascott
Along cylindrical wood log (k = 0.17 w/m∙k and α = 1.28 × 10−7 m2/s) is 10 cm in diameter and is initially at a uniform temperature of 15°c. it is exposed to hot gases at 550°c in a fireplace with a heat transfer coefficient of 13.6 w/m^2∙k on the surface. if the ignition temperature of the wood is 420°c, determine how long it will be before the log ignites.
Answers: 2
Physics, 22.06.2019 03:30, dmarte11092001
What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.
Answers: 1
Physics, 22.06.2019 08:00, jpsaad00
Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.
Answers: 3
Physics, 22.06.2019 16:30, amayareyes101
Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?
Answers: 2
Along cylindrical wood log (k = 0.17 w/m∙k and α = 1.28 × 10−7 m2/s) is 10 cm in diameter and is ini...
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