In this elastic collision two bowling balls each of mass 5.0 kg travel in opposite directions toward each other. Ball A has a velocity of 2.0 m/s and Ball B has a velocity -5.0 m/s. If after the collision Ball B has a velocity of -1.0 m/s, what is the velocity of Ball A after the collision?

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

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?

How many atoms of nitrogen are in the chemical formula ni(w on