Identify each type of radiation as ionizing or non-ionizing. remember that ionizing radiation deposits enough energy when absorbed in a material such that electrons are removed from atoms to create charged ions.
non-ionizing: visible light
ionizing: alpha particles (he nuclei)
non-ionizing: microwaves
ionizing: gamma rays
non-ionizing: infrared
ionizing: beta particles (electrons, positrons)
non-ionizing: radio waves
ionizing: x-rays

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Ivana walks 2km north then turns around and walks 3km south