Physics Homework Solutions

Power delivered to a resistor

Four resistors are connected to a battery with a terminal voltage of 15 V, as shown in attached figure. Determine the power delivered to R2. (R1 = 20 ohm;, R2 = 45 ohm)

DC Circuits

Assume that the length of an axon membrane of about 10 cm is excited by an action potential (length excited = nerve speed x pulse duration = 50 m/s x 2.0 ms = 10 cm). In the resting state, the outer surface of the axon wall is charged positively with K+ ions and the inner wall has an equal and opposite charge of negative org ...continues

DC Circuits

Using the attached figure and the fact that it takes 8.0 x 10-12 J to raise the potential of the inner axon wall to +30 mV from -70 mV and another 4.3 x 10-11 J to restore the inner wall of the axon to -70 mV from +30 mV, find the power supplied to the axon per action potential. _____________W

SHOCKLYE EXPERIMENT

i need help with this problem...some detail explanation.

shockley experiment

please help me with this.

Impedance

Can you please tell me a bit about impedance, and some formulas or calculations that would shed light on the attached.

Operational amplifier, OP-AMP

See attached file for full problem description.

What electric characteristics must an amplifier have for use with pH electrode?

What electrical characteristics must an amplifier have for use with a pH electrode? How would you calibrate such an electrode?

Twin Tee Circuit

(See attached file for full problem description)

op amp applications derivations

Please see attached scan; this is a review from my electronics course; q1. derivation and circuit for a non-inverted output. q2. derivation of equation q3. derivation for gain showing high pass filter and breakpoint frequency q4. derivation for gain showing highpass filter and the difference between an active filter and a fi ...continues

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