I have a textbook that is not in your list and I need soltions tothe homework worked out in detail to verify my work.

Book details:
Title: Physics (not college physics) 2nd edition
Authors: Giambattista, Richardson & Richardson
ISBN: 978007012449.

Please let me know if you can answer questions from this text.

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Textbook: Physics 8e, Cutnell and Johnson
Chap 20 Problem 103

/solution/solution/714716

Question:
In a pacemaker, a pulse is delivered to the heart 81 times aminute.The capacitor that controls this pulsing ratedischarges through aresistance of 1.8*10^6 ohm. One pulse isdelivered everytime thefully charged capacitor loses 63.2% of itsoriginal charge. What isthe Capacitance of the Capacitor?

The equation that you suggest is q= q_o e^(-t/RC)

t =.7404
R=1.8*10^6

So to solve I take the (ln q/q_o) and I get 1.44

So the Capacitance should equal -t/(1.8*10^6)(1.44)

The corect answer in the back of the book is 4.1*10^-7 but whenIwork out the problem I keep getting 2.86*10^-7.

Could you please check the math on this problem and let me know ifIam making a mistake or if the answer given is incorrect?

Thank you so much for your time and help!

Physics Help.Please someone help me!!?

Physics Help.Please someone help me!!?
***Assume that the speed of sound in air is 343 m/s, at 20C,UNLESSOTHERWISE NOTED.***

1.While fishing from a boat anchored offshore, you seeanotherfishing boat between your boat and the shore. The other boatsoundsa 510 Hz horn as it heads toward the shore at a speed of 18m/s
a) If your fishing boat is stationary, what is the frequency ofthesound waves from the horn that reach you?
b) If your fishing boat now heads out to sea at a speed of 15m/s,what is the frequency of the sound waves from the horn thatreachyou?

2. A species of bar navigates by emitting short bursts ofsoundwaves that have a frequency range that peaks at 58.0kHz.
a) If a bat is flying at 4.0 m/s toward a stationary object, whatisthe frequency of the sound waves reaching the object?
b) What is the frequency of the reflected sound waves detectedbythe bat?
c) What is the difference between the frequency of the soundwavesemitted by the bat and the frequency of the sound wavesdetected bythe bat if the bat is flying at 4.0 m/s and the objectis a mothapproaching at 1.0 m/s?

**If you can only solve one, that perfect. I just want to knowhowto do do problems similar to this, so I can understand how todothis in my future...

In a lab that I am doing for one of my Physics classes, it asksa couple questions that I don't totally understand...

-The lab is about Newtons Second law whereF=Mass*Acceleration

-We have a motion sensor setup to detect the motion of an objectmoving because of gravity(acceleration).

-They give us the theoretical model x(t) = At² + Bt + Cin order to extract acceleration values from the position data.They tell us "The prediction is that acceleration is a constant, soan appropriate model is of the form..." previously typed where A,B, and C are constant parameters.

Here are the questions it asks...

1) Why is this the appropriate form?

2) What physical quantities do these parameters have?

3) What is A and how is it related to acceleration?

I know that B = inital velocity and that C = initial position,but what is A, or I guess what is the mathematical relationshipbetween A and acceleration?

I will rate GOOD and QUICK if you can help me understand thesesimple questions!

Thanks in advance!

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