Bluetooth is a technology that allows wireless devices to communicate data and information to each other. for example, a wireless pair of headphones can play music from a smart phone without a physical connection. however, the technology must be low energy enough not to cause damage to the people using the device. additionally, the wavelengths used in bluetooth technologies should not be visible. the waves associated with bluetooth technology are most similar to which wave type below?

a) x-rays
b) red light
c) radio waves
d) uv radiation

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.

Abus travels 280km south along a straight path with an average velocity of 88km/h to the south. the bus stops for 24 min, then it travels 210 km south with an average velocity of 75 km/h to the south. how long does the total trip last?

When solid surfaces slide over each other the kind of friction that occurs is called friction