At the point of fission, a nucleus of U-238, with 92 protons is divided into two smaller spheres each with 46 protons and a radius of 5.9 × 10^?15 m. What is the repulsive force pushing the two spheres apart when they are just touching one another? (The mass of the U-238 nucleus is 3.98 × 10^?25 kg.)
3 500 N
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Your friend says that the heavyweight champion of the world cannot exert a force of 50 N on an isolated piece of tissue paper with his best punch. You
A) agree that it can't be done. B) have reservations about this assertion. C) disagree, for a good punch easily delivers this much force.
The maria are really seas of long since hardened ________, a dark volcanic rock that also makes up the ocean basins of Earth
Fill in the blank(s) with correct word
Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s
What was the speed of the ball at launch? Neglect air resistance. A) 11 m/s B) 23 m/s C) 34 m/s D) 45 m/s E) 48 m/s
Wave energy is economically feasible at the present time
What will be an ideal response?