Una sorgente sonora ferma rispetto all'aria vibra alla frequenza di 1100 Hz. Un rilevatore di suoni che si sta avvicinando alla sorgente registra una frequenza di 1200 Hz. Calcola la velocità del rilevatore.

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

What happens when you slowly pulled the carboard?