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

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?