Levi is installing a heat pump. He installed the pipes two feet deep. He then installed the unit within the house and installed a thermostat inside to regulate the heat pump. Lastly, he installed a furnace in the basement. Which best describes Levi’s errors? A: The pipes need to be at least six feet deep to avoid the freezing ground, and he did not need to install a furnace.
B: He did not need to install a furnace, and pipes are not necessary in the installation and function of a heat pump.
C: Thermostats should be installed directly to the outside unit, and the pipes need to be at least six feet deep to avoid the freezing ground.
D: Pipes are not necessary in the installation and function of a heat pump, and thermostats should be installed directly to the outside unit.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

i believe it is a.) released into

explanation: