1. describe the concept of the unitary executive. discuss whether this concept is practical.

Unitary Executive is a theory that proposes that the whole executive branch should be controlled by the President.

Unitary Executive is generally accepted but some discuss that the amount of power the President has over the executive branch should be somewhat limited.

In regards of practicality, I believe that is useful to have only one person dealing with the branch as long as his or her power is limited by the other two branches.

the answer is b, encourage free trade

uses : -

1.aneroid barometers primarily measure whether pressure is rising or falling.

2.aneroid barometers are often used for reading pressure in homes and recreational boats.  

3.other uses may include barographs in meteorology and altimeters in modern aircraft.  

4.this type of barometer can announce whether a high or low pressure system is coming or whether it is becoming more intense.  

5.there are different types of aneroid barometers, such as the altimeter, which measures altitude, or distance above sea level.  

6.another example is a barograph, which is a modified aneroid barometer that provides constant readings of atmospheric pressure on graph paper.  

7.when used in this capacity, the aneroid barometer can store a week's worth of data.

android diameter a device for measuring atmospheric pressure , often specially calibrated for use as an altimeter ,consisting of a box or chamber partially exhaused of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air

refer to the attachment for the characteristics : -