3. Nevilleis studying the GillyweedPlant. He has it growing in a fish tank in his room. He is recording the rate of photosynthesis by counting the number of bubbles that the plant produces. He moves the lamp form 5cm to 10cm to 15cm and counted the bubbles. Test (independent) Variable:
Result (dependent) Variable:
Constants:
What should he do as a control group:

The answer is b metal denting

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Yeah, but what are you trying to ask?

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.