Philosophy is not considered science because it lacks ?

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

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.