A device that measures absolute air pressure is called a __________
Fill in the blank(s) with correct word
barometer
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(a) Compare the linear atom density of the [100] and [111] directions in the BCC metal iron, with a lattice parameter of 0.286 nm. (b) Which is the most closely packed direction in the BCC structure? (c) What is the radius of an iron atom if it is assumed that the atoms touch along the most closely packed direction?
Consider the equipotential diagram shown below and to the left: 
In what direction does the electric field at point P point?
A. A B. B C. C D. D
Astronomers have measured the Milky Way's mass by
A. observing its gravitational attraction on matter in and near it. B. using radar. C. sending unmanned space missions to the center of the Galaxy. D. observing magnetic fields in the Solar System.
What is a shell and tube heat exchanger?
What will be an ideal response?