Alpha particles, each having a charge of 2e and a mass of 6.64 ×10-27 kg, are accelerated in a uniform 0.80-t magnetic field to a final orbit radius of 0.30 m. the field is perpendicular to the velocity of the particles. how long does it take an alpha particle to make one complete circle in the final orbit?

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 !