Pls asap will give brainlest as a fire truck approached mary, the pitch of the siren got higher. once the fire truck passed and moved away, the siren's pitch got lower. this change in pitch is because of a change in the sound wave's 1. concussion 2. frequency 3. amplitude 4. reflection

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

What are the similarities & differences between a thermistor and a light dependent resistor in physics?