Let i represent a displacement 1 km due east and j represent a displacement 1 km due north. the control tower of an airport is at (0, 0). aircraft within 100 km of (0, 0) are visible on the radar screen at the control tower. at 12 : 00 noon an aircraft is 200 km east and 100 km north of the control tower. it is flying parallel to the vector b = -3i - j with a speed of 4010−−√ km h−1. at what time will the aircraft disappear from the radar screen

Argon, neon, and xenon are examples of

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?

Where should a carbon monoxide detector be mounted?