Larissa volunteers to pick up liter on the weekends. She finds an empty soda bottle floating on the surface of water. She finds a full bottle of soda that has sunk to her feet. Why did one bottle sink and the other one float?

Why there is no inductive reactance in dc circuits

What causes the formation of ocean currents?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.