Questions

Monopotassium tartarate was used in baking powder.

Resistivity :

Resistivity is a measure of the resistance to the flow of electrons. 

Conductivity :

Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.

Example:

Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance. 

The lightest computer is the tablet.

Personal financial planning is the process of creating and achieving financial goals.

True statements regarding personal financial planning:

As we age, the number and complexity of the financial decisions that we make increases.

There are two means for achieving financial goals—you either need to increase your savings or reduce spending.

A family's resources are limited.

The main excretory organs of insects and spiders are Malpighian tubules.

Ans.  Suppose the speed of boat in still water is x km/h and speed of stream is y km/h

Speedof boat in downstream = (x + y) km/h x+ y = 32 …(i) 

Speed of boat in upstream = (x – y) km/h

x – y = 28 …(ii)

Add. Eqs. (i) and (ii), we get 2x = 60

x = 30 km/h

 Nataraga/ Natanarayana