How can a smartphone be protected during a collision

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

What does si stand for, when referring to a system of measurement