Show all work: A rock contains 125g of a radioactive isotope with a half-life of 150,000 years and 875g of its daughter material. How old is the rock according to radioactive dating ?

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

Which governments provide garbage collection services to homes and businesses

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j