A student poured 200 mL of water and 4.0 g of sugar into two separate cups and started a stopwatch. The student stirred the contents of one cup but did not stir the other. He measured the time for the sugar to dissolve completely in each cup. Which choice best describes the purpose of this experiment?

A. To determine the effect of the amount of sugar on the time for it to dissolve in water

B. To determine the effect of temperature on the time for sugar to dissolve in water

C. To determine the effect of the volume of water on the time for sugar to dissolve in water

D.

To determine the effect of stirring on the time for sugar to dissolve in water.

D

Explanation:

To determine the effect of stirring on the time for sugar to dissolve in water.

There's no mention of temperature so it can't be b. There's the same amount of sugar and water in each cup so It can't be A or C therefore D is the only likely answer.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

0.11 m/s and 0.28 m/s should be correct