Potential output: A. is purely a physical phenomenon. B. is related to the long-term growth trend. C. requires government expenditures. D. requires the purchase of new equipment.

B.

Explanation:

Potential output is related to long term growth trend.

Economic growth is the rise in the in the market value (inflation-adjusted) of the products and services which an economy produces over time. It is the percentage increase in the real gross domestic product.

The national income accounting can be used to calculate economic growth. Potential output is directly related to the long term growth trend and vice versa. If there is an increase in output, there will be an increase in growth in the economy all other things constant.

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 : -