1. 297 m/s
2. 297 Hz again? Lol
1. 297 m/s
I agree with 2, but I got 295 m/s for 1... (You may want to check my work because uhh... yeah lol)
Giantpants wrote: ↑November 5th, 2019, 6:45 amI used the simplified formula, but it’s good to know about the other too!
Anyway, what is the speed of sound in a material with a bulk modulus of elasticity of 9.4 E8 N/m^2, and a density of 270 kg/m^3?
EDITS: Just realized it said M/m^2 for like two months. Oops. Anyway rip this question marathon sorry D:
The speed of sound is where is the bulk modulus of elasticity and is the density. This calculates to c = 1.9 km/s.
Yep, looks good! Your turn I guess? Lol or whoever else wants to go can.bernard wrote: ↑January 28th, 2020, 11:15 amGiantpants wrote: ↑November 5th, 2019, 6:45 amI used the simplified formula, but it’s good to know about the other too!
Anyway, what is the speed of sound in a material with a bulk modulus of elasticity of 9.4 E8 N/m^2, and a density of 270 kg/m^3?
EDITS: Just realized it said M/m^2 for like two months. Oops. Anyway rip this question marathon sorry D:The speed of sound is where is the bulk modulus of elasticity and is the density. This calculates to c = 1.9 km/s.
smayya337 wrote: ↑January 30th, 2020, 6:09 pmI'll write a quick one:
I'm walking into school one morning at 1.5 m/s when my friend Spencer, standing on the other side of the auditorium lobby, decides it would be a good idea to take off Naruto running at 2.5 m/s in my direction while screaming an equally-tempered E5. Just another morning at TJ.
Note: Assume c = 343 m/s.
a. What frequency do I hear his shrieking as?
b. What pitch is this?
c. Is it sharp or flat?
d. How many (to the nearest 0.1) cents sharp or flat is this?
Bonus: What two instruments does Spencer play?
a. Doppler effect for APPROACHING objects: An equal-tempered E5 is 659.3 Hz. Plug and chug: b. This is still an E5 c. It is sharp d. Cents equation: Plug and chug: As for the bonus ...I would guess either the piccolo trumpet or piccolo, and I'd probably throw in the recorder as well lol
Sorry for not responding sooner! Yeah, that looks about right for a through d. For the bonus, Spencer is actually a pretty good trumpet player and arguably an even better pianist. He also sings (and probably plays the recorder too, it wouldn't surprise me). Your turn!Nydauron wrote: ↑February 27th, 2020, 7:24 pmsmayya337 wrote: ↑January 30th, 2020, 6:09 pmI'll write a quick one:
I'm walking into school one morning at 1.5 m/s when my friend Spencer, standing on the other side of the auditorium lobby, decides it would be a good idea to take off Naruto running at 2.5 m/s in my direction while screaming an equally-tempered E5. Just another morning at TJ.
Note: Assume c = 343 m/s.
a. What frequency do I hear his shrieking as?
b. What pitch is this?
c. Is it sharp or flat?
d. How many (to the nearest 0.1) cents sharp or flat is this?
Bonus: What two instruments does Spencer play?a. Doppler effect for APPROACHING objects: An equal-tempered E5 is 659.3 Hz. Plug and chug: b. This is still an E5 c. It is sharp d. Cents equation: Plug and chug: As for the bonus ...I would guess either the piccolo trumpet or piccolo, and I'd probably throw in the recorder as well lol
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