Una bala de rifle de 12. 0 g se dispara a 380 ms contra un péndulo balístico de 6. 00 kg, suspendido de una cuerda de 70. 0 cm de longitud (véase el ejemplo 8. 8, sección 8. 3). Calcule a) la distancia vertical que sube el péndulo, b) la energía cinética inicial de la bala y c) la energía cinética de la bala y el péndulo inmediatamente después de que la bala se incrusta en el péndulo.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

a. vertically

explanation:

i tried it and took the test

if im wrong then we have different tests