Physics, 19.10.2019 20:30 trejo282961
During the battle of bunker hill, it is commonly thought that the commanders gave the order "don't shoot until you see the whites of their eyes! " to make sure the british troops were close enough that a hit was a certainty. if take your commander's instructions literally and don't fire until the whites of the enemy's eyes are just resolvable by your pupil, how far away (in meters) are they when you open fire? assume your target has an eye which is 2.9 cm across, the diameter of your pupil is 5.3 mm, and you are observing at a wavelength of 555 nm.
Answers: 3
Physics, 22.06.2019 13:30
Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.
Answers: 1
Physics, 22.06.2019 15:20
Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2
Answers: 2
Physics, 23.06.2019 01:00
Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80
Answers: 1
Physics, 23.06.2019 07:00
Why does an object have a different weight o the moon than it does on earth
Answers: 2
During the battle of bunker hill, it is commonly thought that the commanders gave the order "don't s...
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