Tom is 20 years old when he boards a spaceship that flies at 0.800c toward planet x which is 12 lightyears away. left behind on earth is his twin brother tim. upon reaching planet x, tom immediately turns back and returns to earth at a slower speed of 0.600c. what is the biological age of tim upon tom's arrival on earth?
a. 55 yrs old
b. 45 yrs old
c. 40 yrs old
d. 50 yrs old

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f

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 !

Which governments provide garbage collection services to homes and businesses