Answer: a boy jumping down
Both objects have the same electrical charge. Opposite charges attract. And if they were neutral they would not do anything.
Vaporization of a sample of liquid is a phase transition from the liquid phase to the gas phase.
Answer:
Of the three stars in the system, the dimmest - called Proxima Centauri - is actually the nearest star to the Sun. The two bright stars, called Alpha Centauri A and B form a close binary system; they are separated by only 23 times the Earth - Sun distance.
The SI unit of time is second
