Your goal is to produce fruit preserve using 45 kg of fresh fruit. 210 g of a pectin solution that contains 3 parts pectin (3 wt%), 14 parts sugar (14 wt%) and 83 parts water (83wt%), 300 g of a citric acid solution that contains 50wt% citric acid and the rest water and a solid sugar stream are added along with the fresh fruit to the mixer. The fresh fruit contains 12% soluble solids and the rest water. After mixing, the solution enters an evaporator where some of the water is removed. The final product should contain 68% total solids and 20% sugar. Here total solids include sugar, pectin, citric acid and the soluble solids from the fruit. Required:
Calculate the amount of water thatneeds to be removed from in the evaporator and the amount of sugar that needs to be added.

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.