Which one is the best explanation of energy?
a. making transformations
b. the ability to do work
c. conservation of power
d. measuring joules

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories