Comparing independent decays: simulations of the r-process suggest 1.35 nuclei of u were produced for every 1 nucleus of u in the supernova explosions that made the 235 238 particles that formed earth. the current relative abundances on earth are 0.7 and 99.3 percent, and the half lives are 7.0x10 y and 4.5x10 y, respectively how long ago were those uranium isotopes made? (yes, they're really from several different supernovae, but simplified for the problem. also, they were floating around for a while before earth was formed, so don't just write the age of earth.)

What is the coefficient of kinetic friction μk between the block and the tabletop?

Brades exam guidelines exam instructions billing & payments & support question 6 of 20 : select the best answer for the question use this illustration to answer the question below. forms & resources al programs 9 ww linics 6. in the circuit shown in the figure above, suppose that the value of r, is 100k, and the value of r2 is 470 kq. at which of the following locations in the circuit would you measure the highest voltage with your meter? rvices 999999 a. between points b and c b. between points a and b c. between points b and e d. between points a and c eredu mark for review (will be highlighted on the review page) mend < < previous question next question

How is the acceleration of an object in uniform circular motion constant? a - in magnitude only b - in direction only c - in both magnitude and direction d - in magnitude, direction & orientation