How does water’s high specific heat capacity affect large lakes? a. the water in the lakes changes temperature quickly. b. the water at the bottom of a lake will never freeze. c. the water from lakes evaporates quickly. d. the water in a lake changes temperature slowly.

D. The water in a lake changes temperature slowly.

Explanation: Specific heat is the amount of heat required to raise the temperature of 1 gram of substance through .

Evaporation is the process in which liquid state is changed to gaseous state at any temperature.

Water has high specific heat due to the presence of strong hydrogen bonds which requires large amount of heat to raise the temperature of water. Thus the molecules will not be able to gain enough kinetic energy and thus temperature changes slowly.

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.

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