Avalanche forecasters measure the temperature gradient startfraction dt over dh endfraction , which is the rate at which the temperature in a snowpack t changes with respect to its depth h. a large temperature gradient may lead to a weak layer in the snowpack. when these weak layers collapse, avalanches occur. avalanche forecasters use the rule of thumb that if startfraction dt over dh endfraction exceeds 10 degrees upper c divided by m anywhere in the snowpack, conditions are favorable for weak-layer formation, and the risk of avalanche increases. assume the temperature function is continuous and differentiable. complete parts (a) through (d) below. a. an avalanche forecaster digs a snow pit and takes two temperature measurements. at the surface (hequals0), the temperature is negative 12 degrees upper c. at a depth of 1.7 m, the temperature is negative 3 degrees upper c. using the mean value theorem, what can he conclude about the temperature gradient?
Answers: 3
Physics, 21.06.2019 17:00
Ajogger accelerates from rest to 4.86 m/s in 2.43 s. a car accelerates from 20.6 to 32.7 m/s also in 2.43 s. (a) find the magnitude of the acceleration of the jogger. (b) determine the magnitude of the acceleration of the car. (c) how much further does the car travel than the jogger during the 2.43 s?
Answers: 2
Physics, 22.06.2019 11:00
Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line
Answers: 2
Physics, 22.06.2019 14:20
A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.
Answers: 3
Physics, 22.06.2019 19:40
Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?
Answers: 1
Avalanche forecasters measure the temperature gradient startfraction dt over dh endfraction , which...
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