Una esfera de 10[kg] y velocidad de 50[m/s] choca a otra de 20[kg] en reposo. ¿Con qué rapidez sale la esfera de 20[kg] si la primera queda en reposo?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

If the new moon happens on january 15th, what shape will it be on february 6th?