An airplane is flying at a constant speed in a positive direction. it slows down when it approaches the airport where it's going to land. which term describes the slowing of the plane?

a) stationary
b) positive velocity
c) positive acceleration
d) negative acceleration
e) constant velocity

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

What are atoms of the same element with varying number of neutrons

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !