What are the food items contain minerals?

Which one of the following type of plastids does not contain stored food material?

A circular loop is kept in that vertical plane which contains the north- south direction. It carries a current that is towards north at the topmost point. Let A be a point on the axis of the circle to the east of it and B a point on this axis to the west of it. The magnetic field due to the loop.

We would have observed that the plate that covers the cooked food items have water droplets inside. Why? Explain.

What properties of microwaves make them suitable for a. Heating food rapidly b. Carrying digital signals to and from a satellite ?

(Diet problem): A dietician has to develop a special diet using two foods P and Q. Each packet (containing 30 g) of food P contains 12 units oif calcium, 4 units iof iron, 6 units of cholesteroa and 6 units of vitamiin A. Each packet of the same quantity of food Q contains 3 units of calcium, 20 units of iron, 4 units of cholesterol and 3 units of vitamin A. The diet requires atleast 240 units of calcium, atleast 460 units of iron and at most 300 units of cholestero. How many packets of each food should be used to minimise the maount of vitamin A in the diet? What is the minimum amount of vitamin A?

A spherical shell made of plastic, contains a charge Q distributed uniformly over its surface. What is the electric field inside the shell? If the shell is hammered to deshape it without altering the charge. Will the field inside be changed? What happend if the shell is made of a metal?

Reshma wishes to mix two types of food P and Q in such a way that the vitamin contents of the mixture contain atleast 8 units of vitamin A and 11 units of vitamin B. Food P costs Rs. 60// kg and food Q cost Rs. 80/kg. food P contains 3 units/ kg of vitamin A and 5 units/ kg of vitamin B while food Q contains 4 units/kg vitamin A and 2 units/kg of vitamin B. Determine the minimum cost of the mixture .

A diet is to contain atlest 80 units of vitamin A and 100 units of minerals. Two foods F_(1) and F_(2) are available. Costs Rs. 6 per unit. One unit of food F_(1) contains 3 units of vitamin A and 4 units of minerla one unit of food F_(2) contains 6 units of vitamin A and 3 units of minerals. Formulate this as a linear programming problem. Find the minimum cost for diet that consists of mixture of these two foods and also meets the minimal nutritional requirements.