a jet plane lands with a velocity of +100m/s and can accelerate at a maximum rate of -5.0m/s2 to0.00m/sits comes to rest can this plane land at an airport where the runway is 0.80km long ?

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Carbon 14 is a naturally occurring stable

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.