Aluminum bronze, an alloy containing 90% Cu (atomic weight = 63.57) and 10% Al (atomic weight = 26.98) by weight, has density of 7.6 g/cm3. What are the linear and mass attenuation coefficients for 0.4 MeV gamma rays if the cross section for Cu and Al for this quantum energy are 9.91 and 4.45 barns?

Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. the winds blow from west to east in jet streams but the flow often shifts to the north and south. jet streams follow the boundaries between hot and cold air. the earth's rotation is responsible for the jet stream as well.

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

Ireally just need to get finished with precal! i’m really sorry i have to do this! hope this !