What is the answer of 8, 9 and 10 PLZ?

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

What happens in a global convection cell

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10