A charge of 18 nC is uniformly distributed along a straight rod of length 3.1 m that is bent into a circular arc with a radius of 1.9 m. What is the magnitude of the electric field at the center of curvature of the arc?

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?