Why did Thomson observe two glowing dots when he put neon gas into a cathode-ray tube?

(A) The neon contained impurities
(B) The neon was made up of two different isotopes whose atoms had different
chemical properties.
(C) The neon was made up of two different isotopes whose atoms had different
masses.
(D) The neon was made up of two different isotopes whose atoms had different
charges.

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Asher cycles 12 miles in 16 hours. what is his speed?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.