A solenoid contains 300 coils of very thin wire evenly wrapped over a length of 20 cm. Each coil is 0.80 cm in diameter. If this solenoid carries a current of 4.0 A, what is the magnetic field at its center?

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?

What structural formula represents 4 electrons shared between two atoms?