An electric field of magnitude 5.25 x 10' N/C points due south at a certain location. Find the magnitude and direction of the force on 3-5.85 C charge at this location. magnitude IN direction -Selech Four point charges are located at the corners of a square. Each charge has magnitude 3.10 nC and the square has sides of length 2.10 cm. Find the magnitude of the electric field in N/C) at the center of the square if all of the charges are positive and three of the charges are positive and one is negative. HINT (a) all the charges are positive NC (b) three of the charges are positive and one is negative N/C

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

Determine the maximum r-value of the polar equation r =3+3 cos 0