Evangelista torricelli was the first person to realize that we live at the bottom of an ocean of air. he correctly surmised that the pressure of our atmosphere is attributable to the weight of the air. the density of air at 0°c at the earth's surface is 1.29 kg/m3. the density decreases with increasing altitude (as the atmosphere thins). on the other hand, if we assume that the density is constant at 1.29 kg/m3 up to some altitude h, and zero above that altitude, then h would represent the depth of the ocean of air.

(a) use this model to determine the value of h that gives a pressure of 1.00 atm at the surface of the earth.
(b) would the peak of mt. everest rise above the surface of such an atmosphere?
yes or no?

What is hidden during a lunar eclipse? isn't the moon hidden?

Two horizontal plates with infinite length and width are separated by a distance h in the z direction. the bottom plate is moving at a velocity u. the incompressible fluid trapped between the plates is moving in the positive x-direction with the bottom plate. align gravity with positive z. assume that the flow is fully-developed and laminar. if the systems operates at steady state and the pressure gradient in x-direction can be ignored, do the following: 1. sketch your system 2. identify the coordinate system to be used. 3. show your coordinates and origin point on the sketch. list all your assumptions. 5. apply the continuity equation to your system. nts of navier stokes equations of choice to your system 7. solve the resulting differential equation to obtain the velocity profile within the system make sure to list your boundary conditions. check units of velocity 8. describe the velocity profile you obtain using engineering terminology. sketch that on the same sketch you provided in (1). 9. obtain the equation that describes the volumetric flow rate in the system. check the units.

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than