A sample of Cobalt-60 has an activity of 3000 Bq. What will the activity be after 50 years? Cobalt-60 has a half-life of 5 years. 23.4375 1.46484375 5.859375 2.9296875​

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.