Which is a common source of experimental error? 1-Immersive Reader reading an instrument from an angle
2-using the wrong instrument to make a measurement
3-framing a hypothesis without knowing for sure that it is correct

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

Could we see a galaxy that is 20 billion light-years away?