When one celestial body moves into the path of another, blocking its light, the event is known as an eclipse. There are two types of eclipses. A solar eclipse is when the moon
blocks the sun. A lunar eclipse is when the Earth blocks the sun's light from reaching the
moon. Because objects in space travel according to a pattern, solar and lunar eclipses are
predictable. So you can find out when the next eclipse is happening and whether you can see
if from where you live.
Which of the following is not true about eclipses?
A
they occur when light is blocked
B
they are unpredictable events
they can be lunar or solar
D
they can be seen from Earth

One kind of e-book display consists of millions of very small spheres that float in a thin fluid layer between two conducting transparent plates. each sphere is black on one side and white on the other, and possesses an electric dipole moment directed from the white side to the black. when an electric field is applied between the plates, the spheres rotate so that their dipole moment lines up with the field. depending on the fields direction, either the black or the white sides of th espheres can be made visible.the dipole moment of the spheres can be modeled as two opposite charges of magnitude 3.5 x 10^-15 c, separated by a distancce of 100 micrometers (um). what is the maximum possible torque on a sphere if the electric field between the transparent plates is 4.0 x 10^5 n/c