5. Three investigation I, II and III, were carried out for the reaction between calcium carbonate powder and excess hydrochloric acid of different concentrations. The results of the investigations
are shown
a. Which investigation used hydrochloric acid of the lowest concentration?
b. What do you notice about the speed of reaction for all three investigations as the reaction
proceeded? Explain your observations.
C. What can you infer from Graph Ill?
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Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Describe cytokinesis in plants and animals. in animals: in plants.

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.