To make salt water a heterogeneous mixture, you would have to a) add sand. b) add a small amount of sugar. c) boil the water. d) remove the salt.

Answer : The correct option is, (A) add sand

Explanation :

Heterogeneous mixtures : It is a mixture that has non-uniform composition throughout the solution and the particle size or shapes are also different.

There is a physical boundary between the dispersed phase and dispersion medium.

Homogeneous mixtures : It is a mixture that has uniform composition throughout the solution and the particle size or shapes are not different.

There is no physical boundary between the dispersed phase and dispersion medium.

As we know that salt water is a homogeneous mixture because its composition is the same throughout the solution.

To make salt-water a heterogeneous mixture, we would have to add sand in the solution.

If we add small amount of sugar then the mixture becomes homogeneous.

Hence, the correct option is, (A) add sand

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  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.