g Polaris, also called the North Star, is moving toward us. For a stationary source, the red hydrogen spectral line is at a wavelength of 656.279 nm. Due to the radial velocity of the star, the line is blue-shifted by 0.037 nm. At what wavelength will a scientist on Earth observe the shifted line

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths