Blood storage. Blood stored at 4.0 ∘C lasts safely for about 3 weeks, whereas blood stored at -160 ∘C lasts for 5 years. Express 4.0 ∘C on the Fahrenheit and Kelvin scales.

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

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.