## Search found 121 matches

February 28th, 2019, 9:25 am
Forum: 2019 Question Marathons
Topic: Thermodynamics B/C
Replies: 127
Views: 12248

### Re: Thermodynamics B/C

What type of heat engine can a hurricane be likened to? What is its source of heat and where does it exhaust the heat to? Assuming typical temperatures, pressures, etc. for the source of heat and exhaust (you may want to look up these typical values), what is its theoretical maximum efficiency? I h...
February 27th, 2019, 8:12 pm
Forum: 2019 Question Marathons
Topic: Thermodynamics B/C
Replies: 127
Views: 12248

### Re: Thermodynamics B/C

What type of heat engine can a hurricane be likened to? What is its source of heat and where does it exhaust the heat to? Assuming typical temperatures, pressures, etc. for the source of heat and exhaust (you may want to look up these typical values), what is its theoretical maximum efficiency?
February 27th, 2019, 4:50 pm
Forum: 2019 Question Marathons
Topic: Sounds Of Music C
Replies: 120
Views: 13955

### Re: Sounds Of Music C

A percussionist strikes a chime bar and measures some of its resonant frequencies: Fundamental: 80 Hz 1st overtone: 220 Hz 2nd: 430 Hz 3rd: 715 Hz 4th: 1070 Hz 5th: 1500 Hz What note would the ear most likely hear based on this series of overtones? What overtones contribute the most to the percepti...
February 27th, 2019, 3:37 pm
Forum: 2019 Question Marathons
Topic: Thermodynamics B/C
Replies: 127
Views: 12248

### Re: Thermodynamics B/C

An engine has a compression ratio of 10. The gas inside is an ideal monatomic gas. a) Calculate the Otto efficiency of this engine. b) Calculate the Diesel efficiency of this engine with a cutoff ratio of 5. c) Is there a value for the cutoff ratio that causes the Otto and Diesel efficiencies to be...
February 27th, 2019, 3:04 pm
Forum: 2019 Question Marathons
Topic: Sounds Of Music C
Replies: 120
Views: 13955

### Re: Sounds Of Music C

A percussionist strikes a chime bar and measures some of its resonant frequencies: Fundamental: 80 Hz 1st overtone: 220 Hz 2nd: 430 Hz 3rd: 715 Hz 4th: 1070 Hz 5th: 1500 Hz What note would the ear most likely hear based on this series of overtones? What overtones contribute the most to the perceptio...
February 27th, 2019, 12:39 pm
Forum: 2019 Question Marathons
Topic: Sounds Of Music C
Replies: 120
Views: 13955

### Re: Sounds Of Music C

wec01 wrote:1) What is the spiral-shaped organ in the inner ear called?
2) What fluid is this organ filled with?
3) What bones carry sound waves from the tympanic membrane to this organ?
```1. Cochlea
2. Perilymph and endolymph
3. Malleus, Incus, Stapes```
February 27th, 2019, 12:33 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14057

### Re: Circuit Lab B/C

A guess|N-gate and P-gate transistors? P gates allow flow when the signal is low (logic 0), while N-gates allow flow when the signal is high (logic 1). Might be misinterpreting this question. That’s not what I was going for. Let me try rephrasing the question: Describe a circuit in which macro-leve...
February 27th, 2019, 4:14 am
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14057

### Re: Circuit Lab B/C

Positive and negative charge carriers behave the same in almost all circuits. However, there are some circuits in which it actually makes a difference whether charge carriers are positive or negative. What is an example of a circuit in which this matters, and why does the distinction matter for thi...
February 26th, 2019, 7:53 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14057

### Re: Circuit Lab B/C

Positive and negative charge carriers behave the same in almost all circuits. However, there are some circuits in which it actually makes a difference whether charge carriers are positive or negative. What is an example of a circuit in which this matters, and why does the distinction matter for this...
February 26th, 2019, 7:42 pm
Forum: 2019 Question Marathons
Topic: Sounds Of Music C
Replies: 120
Views: 13955

### Re: Sounds Of Music C

John is asked to play a C on his trumpet. He does so, but a tuner measures him as being 200 cents flat. What mistake did he make and how does he correct this error? Is an alto saxophone player prone to make this same error? A flute player? A marimba player? An english horn player? For each of those...