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

What sort of waves exhibit the doppler effect?

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?