Pls answer fast!
a girl throws a rock into a pond. a leaf floating ok the pond bobs up and down but does not change location on the ponds surface. why not?

a. the wave transports only energy, not matter.
b. the rock produced a stationary wave, not a moving wave
c. the rock was only a single disturbance, not a repeating motion.
d. the wave made by the rock is not strong enough to move the leaf

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

What are similarities and differences between refraction, reflection, diffraction and absorption?