Uranium-235 is used as fuel in nuclear power plants. Natural ore containig 0.7% uranium nees to be enriched, or concentrated , to 3.5% to be used in power plants. How many more times is the uranium concentration in the power plants than in natural ore?

a. 0.2
b. 5.0
c. 4.2
d 2.8

Newton's law of universal gravitation states that the force f between two masses, m1 and m2, is given below, where g is a constant and d is the distance between the masses. find an equation that gives an instantaneous rate of change of f with respect to d. (assume m1 and m2 represent moving points.)

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Use the information presented in the graph to answer the questions. which segments show acceleration? which segment indicates that the object is slowing down? what is the velocity of segment b? what is the acceleration of segment b?