Cual es la principal fuente de energia mas utilizada en un generador electrico

Explain using examples, what is simple harmonic motion and why it is an important area of study in physics.

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?