Saturday

September 20, 2014

September 20, 2014

Number of results: 116

**Science**

What is the rule for combining resistors in series and parallel circuits( combination circuits)?
*October 17, 2007 by Jeni*

**physics**

Given circuits for f and f−1, we can create classical reversible circuits Rf, R−1f, Rf−1, R−1f−1 which are shown in the following figure. (Assume that f is a bijection.)In what sequence shall we apply the above circuits in order to implement a ...
*March 6, 2013 by s*

**science**

how does an electric ciircuit work? Books have been written about electrical circuits, what kinds, specilized circuits, etc. You need to be a little more specific with your question.
*April 23, 2007 by garret*

**Statistics**

An electronic product contains 32 integrated circuits. The probability that any integrated circuit is defective is 0.02, and the integrated circuits are independent. The product operates only if there are no defective integrated circuits. What is the probability that the ...
*February 20, 2014 by Ashley*

**electric circuit**

Some types of fuses used to protect electric meters have resistances of several ohms. Is this objectionable (a) in ammeter circuits and (b) in voltmeter circuits? Why?
*July 29, 2014 by Anne*

**physics**

Design some simple digital circuits based on Boolean expressions. Draw circuits that implement the following Boolean expressions using some combination of AND, OR, NOT, NAND, and NOR gates. - NOT X OR NOT Y OR Z - X OR Y OR NOT Z - NOT X AND Y OR NOT Y AND Z Write a two to ...
*June 10, 2009 by Sandhya*

**physics**

The figure below shows three circuits, each consisting of a switch and two capacitors, initially charged as indicated. Let qL represent the charge on the left-hand capacitor in each circuit. The switches in all circuits are then closed.
*April 9, 2013 by bryan*

**Circuits**

In Circuits lab, we had to construct different types of operational amplifiers. The inverting and summing amplifiers produced similar output voltage to the calculated ones but were not negative. I was just wondering why they didn't reverse the sign in the experiment?
*April 30, 2012 by Ana*

**Circuits**

In Circuits lab, we had to construct different types of operational amplifiers. The inverting and summing amplifiers produced similar output voltage to the calculated ones but were not negative. I was just wondering why they didn't reverse the sign in the experiment?
*April 30, 2012 by Ana*

**physics**

for circuits with either an inductor or capacitor, the current gets out of phase with the voltage. for these circuits how are the frequencies of the current and voltage related?
*March 9, 2012 by fatih*

**Discrete Mathematics**

Consider the complete graph with 5 vertices, denoted by K5. A. Draw the graph. B. How many edges are in K5? How many edges are in Kn? C. Find an isomorphic representation (graph) of K5. Give the isomorphism mappings. D. Does K5 contain Eulerian circuits? (why?) If yes, draw ...
*August 3, 2013 by Joy*

**Math!!**

Christmas lights that stay on when one bulb burns out are wired as parallel circuits. Resistors can be used with parallel electrical circuits to restrict the current flow and produce heat. If the first resistor (R1) = 20 Ohms, the second resistor (R2) = 30 Ohms and the ...
*March 3, 2013 by Urgent math help!!*

**mathematica**

Christmas lights that stay on when one bulb burns out are wired as parallel circuits. Resistors can be used with parallel electrical circuits to restrict the current flow and produce heat. If the first resistor (R1) = 20 Ohms, the second resistor (R2) = 30 Ohms and the ...
*March 3, 2013 by Please Urgent Urgent! math help!!*

**math**

A calculator requires a keystroke assembly and a logic circuit. Assume that 83% of the keystroke assemblies and 92% of the logic circuits are satisfactory. Find the probability that a finished calculator will be satisfactory. Assume independence of keystroke assemblies and ...
*September 24, 2009 by jessica*

**math**

A calculator requires a keystroke assembly and a logic circuit. Assume that 83% of the keystroke assemblies and 92% of the logic circuits are satisfactory. Find the probability that a finished calculator will be satisfactory. Assume independence of keystroke assemblies and ...
*October 1, 2009 by Aleah*

**science**

what does p.c.b stand for when your working with circuits?
*October 1, 2008 by zazi*

**Physics**

How are series and parallel circuits wired?
*May 12, 2008 by Kelly*

**electricity**

closed circuits allow current to flow. b b
*August 23, 2005 by bobpursley*

**physics**

What are some examples of real resistors used in circuits?
*July 19, 2011 by Tina*

**Science - Electric Circuits**

A __________is the flow of _________ along a path?
*March 11, 2008 by Evan*

**Science**

Can you advise me on how to draw electrical circuits for equipment in my room such as my tv and stereo. Thanks
*October 12, 2009 by Lewis*

**Physics**

Why is parallel circuit brighter compared to series? ( Only one bulb is present in both circuits) Thanks :)
*August 26, 2012 by Tiffany*

**about Engineering**

Electronic and Communication Engineering is mainly Mathematical analysis, implemented in practical circuits. You have to understand higher forms of math, and think in those terms. You have to understand the imperfect models used for systems analysis. You have to understand ...
*May 24, 2007 by bobpursley*

**Electronics/Circuits**

Just a simple one... which symbol should I use to represent a strain gauge on circuit diagram? Thanks
*May 11, 2008 by Jake*

**circuits**

in a parallel RLC circuit you have L=100mH and i= inductor current i=50e^(-4000t)-10e^(-5000t) mA how do you find R and C??
*March 23, 2009 by alice*

**Circuits/physics**

For the element shown below, v(t)=1/2tVolts and i(t) = 12t-4t^2 Amps. (a) Find the instantaneous power p(t) as a function of time. + v(t) - |------| -----| |----- |------| i(t)----->
*August 23, 2009 by Bobby*

**Electrical Circuits**

find the number of free electrons in a copper conductor having a diameter of 0.064 in. and a length of 1000ft.
*November 20, 2011 by Marc Eugene Adriano*

**circuits **

If a series RLC circuit has R = 25 ohm, XL = 50 ohms, and XC = 30 ohms, what will be the total impedance?
*May 30, 2013 by Adam*

**Science(electric circuits)**

What is the conclusion about current in a series electric circuit
*June 12, 2014 by Lesedi*

**Science(electric circuits)**

What is the conclusion about current in a parallel electric circuit
*June 12, 2014 by Lesedi*

**circuits**

Determine the gain in dB for a filter that has an output power of 4.9 W and an input power of 3.6 mW.
*May 30, 2013 by Adam*

**College Physics**

In ordinary laboratory circuits, charges uC (microcoulomb) and nC (nanocoulomb) range are common. How many excess electrons must you add to an object to give it a charge of (a) -2.50 uC (b) -2.50 nC.
*January 21, 2008 by Jen*

**electrical**

The minimum size of electrical cable recomended for use inpower circuits by the NEC in adomestic installation is
*October 31, 2009 by Brannico*

**Science(electric circuits)**

What happaned in the series electric circuit with the one bulb disconnected?please Explain
*June 12, 2014 by Lesedi*

**Science(electric circuits) **

What is the conclusion about the potential difference(voltmeter readings) in a series electric circuit
*June 12, 2014 by Lesedi*

**Science(electric circuits)**

What is the conclusion about the potential difference(voltmeter readings) in a parallel electric circuit
*June 12, 2014 by Lesedi*

**Physics- Circuits**

At time t=0, a potential difference of 475 V is applied to a coil with an inductance L=0.642 H and a resistance R=36 ohms. How long does it take to reach 20 percent of maximum energy in the inductor?
*April 12, 2008 by Bobby*

**French**

how would you say "the wire through which the electric current flows." wouold it be, Le fils ca le courant electrique couler a travers. Load(as in electricity): A device that transforms electrical energy into other forms of energy. is it, "Charge: un appareil ca transformer l'...
*May 10, 2008 by Slappy*

**circuits**

when a parallel 5k ohm resistor and a 25k ohm resistor have a 10v supply, what is the total power loss?
*March 19, 2013 by Anonymous*

**science**

There are three sources of resistance in a parallel circuit. Two of them are rated at 20 ohms, the other at 10 ohms. What is the circuits total resistance?
*July 5, 2010 by teresa*

**French/Science**

I know i posted this already but no One really answered how would you say "the wire through which the electric current flows." wouold it be, Le fils ca le courant electrique couler a travers. Load(as in electricity): A device that transforms electrical energy into other forms ...
*May 10, 2008 by Slappy*

**Circuits**

How do I design a low pass filter for an Fc = 4000 Hz and a high pass filter for Fc =2000 Hz?
*April 9, 2012 by Heather*

**circuits**

A string of five series resistors is connected across a 20 v battery. Zero volts are measured across all the resistors except the second one. What can be wrong with this circuit?
*May 30, 2013 by Adam*

**optical circuits**

Two 1-km fibers are spliced together. Each fiber has a 5-dB loss, and the splice adds 1 dB of loss. If the power entering is 2 m W, then how much power is delivered to the end of this combined transmission line?
*August 31, 2013 by bree*

**Physics - Circuits**

Theres a circuit wired in series that has 4 resistors. 1) 10 ohms 2) 6 ohms 3) 1 ohms 4) 2 ohms Find the potential difference across the 10ohm resistor. Answer in units of V What exactly am i supposed to do to calculate this?
*February 14, 2012 by Anonymous*

**Science**

What are fuses and why do they come in different sizes? Fuses are devices placed in electrical circuits as protection for those circuits. They consist of small pieces of wire, sometime as ribbons, and are placed in series with the circuit so that the current passing through ...
*September 28, 2006 by Bethan*

**Physics URGENT**

I did a lab on DC circuits, and we calculated the resistance of multiple resistors in parallel. Resistance of Resistor 1 & 2 = 1000 +/- 5% so R1 =1000+/- 50 R2= 1000 +/1 50 i need to calculate R using the equation... R= 1/R1 + 1/R2 I am confused as to what the uncertainty ...
*February 8, 2010 by Katelynn*

**circuits**

a parallel RLC bandpass circuit with C=10nF and Q=10 has a center frequency of 500 krad/s. Find R,L and the two cutoff frequencies. Can you design this circuit using a cascade connection of two first-order filters seperated by a follower?
*April 20, 2009 by alice*

**circuits**

For the transfer function Tv(s)=[10(s+5)(s+20)]/[(s+1)(s+100)] is this a low-pass, high-pass, bandpass or bandstop function? estimate the corner frequency(ies) estimate the passband gain what is the output if v1(t)=10cos(1000t+45deg) V??
*April 20, 2009 by alice*

**college**

A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and lower control limits ...
*December 8, 2010 by jackie*

**Math**

A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and lower control limits ...
*December 9, 2010 by jackie*

**Introduction to Electricity and Circuits**

A light bulb is wired in series with a 142 resistor, and they are connected across a 120 V source. The power delivered to the light bulb is 22.3 W. What are the two possible resistances of the light bulb?
*February 6, 2011 by Jiji*

**Circuits**

I want to know why is it that a voltage in a capacitor cant change instantaneously and why the current in an inductor cant change instantaneously either. Also, a capacitor stores energy, like a battery, right? Why is it that it can't be used to power, say, and electric train ...
*March 10, 2012 by Tina*

**Physics**

Hey all. I have to find Thevenin’s UTHEV and RTHEV, which can replace the circuit found here: img24.imageshack.us/img24/1723/thevenin.jpg I can do it for small circuits, but this one confuses me a bit. Hope you can get me goig. Thank you very much.
*March 14, 2009 by Muusen*

**computers**

which set of terms below correctly pairs a generation of computers with key innovation associated with it? a. 2nd generation/ intergrated circuits b. 3rd generation/programming languages c. 4th generation/ operating systems d. 5th generation/artificial intelligence
*November 12, 2007 by holli*

**Physical Science, ipc**

Which can you do to reduce the power consumption in your home? ________________________________________ A. Add more circuit breakers. B. Wire more parallel circuits. C. Replace 75-watt light bulbs with 40-watt light bulbs.
*July 15, 2010 by Superman*

**chemistry**

Silicon for computer chips is grown in large cylinders called “boules” that are 300 mm in diameter and 2 m in length,as shown.(Figure 1) The density of silicon is 2.33 g/cm3. Silicon wafers for making integrated circuits are sliced from a 2.0 m boule and are typically 0.75 mm ...
*September 18, 2014 by Anonymous*

**current physics**

when dealing with circuits, and you say "the voltage across the battery" and "a current through the battery" what do the words across and through mean.
*February 5, 2009 by Anonymous*

**Physics**

Your lab partner says that a battery provides not a source of constant current, but a source of constant voltage. Do you agree or disagree and why? Also I am really confused with series and parallel circuits like when voltage, current, and resistance increase and decrease
*April 14, 2012 by rebekah*

**Physics help please!**

Hi all. I posted earlier but I'm still stuck on part of this problem. I thought that statements 2 and 3 were correct below. But I got the problem wrong. Any help would be great! Can the voltage across any of the three components in the R-L-C series circuit ever be larger than ...
*March 3, 2012 by Jim*

**internationa business operations management**

As the production manager for an electronic circuit company you have encountered the following situation. Part 1 A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What ...
*August 19, 2010 by lisette*

**physics-series and parellel circuits**

I'll try to explain the schmatic drawing... a 120V battery, total of 12A, leads into a 8ohm resistor (R1), then breaks off into two parallel lines, R2 and R3. the resistance is unknown in R2, and in R3 the resistance is 3 ohms. I need to find the Amperage in R1,R2 and R3 as ...
*May 20, 2012 by Dav e*

**Physics circuit help please!**

Hi all. I posted earlier but I'm still stuck on part of this problem. I thought that statements 2 and 3 were correct below. But I got the problem wrong. Any help would be great! Can the voltage across any of the three components in the R-L-C series circuit ever be larger than ...
*March 3, 2012 by Jim*

**Electricity and Electronics**

A circuit contains twodevices that are connected in parallel. If the resistance of one of these devices is 12 ohms and the resistance of the other devices is 4 ohms, the total resistance of the two devices is? 1/R = 1/R1 + 1/R2 You have R1 and R2. Solve for R. It will be less ...
*June 15, 2006 by jackie*

**Physics**

I am having some problems trying to figure this out. Series circuits I have a "d" battery, a battery holder, 3 different resistors, and a multimeter. How do I put the resistors into a series cicuit? And when I use the multimeter, does it need to be set on ohms or volts? Also, ...
*October 15, 2007 by Soly*

**physics, help with circuits please!**

Can the voltage across any of the three components in the R-L-C series circuit ever be larger than the maximum voltage supplied by the AC source? That maximum voltage is 50 volts in this situation. Also, does Kirchoff's loop rule apply to this circuit? In other words, is the ...
*March 1, 2012 by Jim*

**Math**

The total resistance of two circuits in parallel is 15 ohms and one circuit has five times the resistance of the other, find the resistance of each circuit. Use 1/R=1/R1+1/R2. R1 and R2 are two individual resistances. a)Find the smaller resistance b)Find the larger resistance
*March 12, 2013 by Megan*

**circuits**

the zero input response of a series RLC circuit with R=80 ohms is V(c)=2e^(-2000t)cos(1000t)-4e^(-2000t)sin(1000t) V for t>0 if the initial conditions remain the same, what is the zero-input response when R=40 ohms
*March 23, 2009 by alice*

**chemistry**

Silicon for computer chips is grown in large cylinders called “boules” that are 300 mm in diameter and 2 m in length,as shown.(Figure 1) The density of silicon is 2.33 g/cm3. Silicon wafers for making integrated circuits are sliced from a 2.0 m boule and are typically 0.75 mm ...
*September 18, 2014 by Anonymous*

**Physics**

Two circuits (the figure below) are constructed using identical, ideal batteries (emf = E ) and identical lightbulbs (resistance = R). If each bulb in circuit 1 dissipates 4.00 W of power, how much power does each bulb in circuit 2 dissipate? Ignore changes in the resistance ...
*February 16, 2012 by jason*

**Physics- Circuits **

In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 5.53. The resonant frequency is 220 Hz. ...
*February 24, 2013 by Please HELP *

**Electronics, Physics, Circuits**

Help!! problem about capacitance and inductance... please help me... god bless u all... 1.) A capacitance of 2.0 micro-Farad with an initial charge Qo is switched into a series circuit consisting of a 10.0 ohms resistance. Find Qo if the energy dissipated in the resistance is ...
*October 23, 2009 by Huck*

**Circuits**

A 170 -pF capacitor is connected in series with an unknown capacitance, and as a series combination they are connected to a battery with an emf of 25.0 V. If the 170 -pF capacitor stores 135 pC of charge on its plates, what is the unknown capacitance?
*March 3, 2012 by Susan*

**business**

MGT635-1003B-04 International Business Operations Management Assignment Name: Unit 5 Individual Project Deliverable Length: 6-7 body pages Details: As the production manager for an electronic circuit company you have encountered the following situation. Part 1 A process for ...
*August 15, 2010 by 1SGCalhoun*

**Physics**

Two circuits (the figure below) are constructed using identical, ideal batteries (emf = E ) and identical lightbulbs (resistance = R). If each bulb in circuit 1 dissipates 4.00 W of power, how much power does each bulb in circuit 2 dissipate? Ignore changes in the resistance ...
*February 16, 2012 by jason*

**physics**

Each of the four circuits in the drawing consists of a single resistor whose resistance is either R or 2R, and a single battery whose voltage is either V or 2V. The unit of voltage in each circuit is V = 10 V and the unit of resistance is R = 8 Ω. Determine (a) the power ...
*February 14, 2013 by Anonymous*

**Physics**

I'm totally confused and this is due Monday- We're dealing with electrical circuits and I have to construct a circuit with resistors of 10 Ohms, 20 Ohms, 30 Ohms and 20 Ohms. The total resistance has to be 42 Ohms-Can someone direct me how to even begin to draw this-I know ...
*March 26, 2011 by Aubrey*

**physics**

the table below shows the values of the resistance, capcitive reactance and inductive reactance for five RCL circuits. in which circuit will the voltage lead the current? Resistance capacitive inductive reactance reactance a)50 ohm 288ohm 244ohm b)120 ohm 58 ohm 18 ohm c)...
*May 2, 2010 by seema*

**Circuits Problem (Physics)**

h t t p ://img266.imageshack.us/my.php?image=circuit2ru6.png Given the circuit above: a) Solve for unknown currents. b) What is the potential difference between points a and b? c) If both batteries start with 20 A*h of charge, how long does it take the first of the batteries ...
*April 12, 2008 by Eileen*

**Physics**

In the absence of a nearby metal object, the two inductances (LA and LB) in a heterodyne metal detector are the same, and the resonant frequencies of the two oscillator circuits have the same value of 510.0 kHz. When the search coil (inductor B) is brought near a buried metal ...
*March 21, 2013 by Elizabeth*

**Physics**

In the absence of a nearby metal object, the two inductances (LA and LB) in a heterodyne metal detector are the same, and the resonant frequencies of the two oscillator circuits have the same value of 580.0 kHz. When the search coil (inductor B) is brought near a buried metal ...
*April 11, 2013 by Anonymous*

**Physics**

Could some one tell m if this is right? 1)Does currend flow through a resistor or across a resistor in a series circuit? THROUGH 2) Is a voltage establishes through a resistor or across ? ACROSS PARALLEL CIRCUITS 1)there is a voltage drop of 6volts across each 2-Ů resistor the...
*March 25, 2009 by joshua*

**Circuits**

I need to calculate the voltage through the resistor and the voltage through the inductor of an RL series circuit for different frequencies. The voltage of the source is 2.5 V. The inductor is at the top and has an inductance of .200 H and the resistor is at the right with a ...
*March 24, 2012 by Heather*

**Circuits**

I need to calculate the voltage through the resistor and the voltage through the inductor of an RL series circuit for different frequencies. The voltage of the source is 2.5 V. The inductor is at the top and has an inductance of .200 H and the resistor is at the right with a ...
*March 24, 2012 by Heather*

**circuits**

so i have a circuit (series) where the the emf=12 V and R1=2 ohms and R2=0 ohms. Basically, theres's a square. The battery voltage(12V) is on the left side. The R1=2 is on the top side of the square and R2=0 ohms is on the right side of the square. The total current of the ...
*February 16, 2009 by Anonymous*

**Physics**

1. Ohm's Law states that for some circuits the voltage is proportional to the current. In other words, if you double the voltage, you will double the current. Which of these equations agrees with this statement of Ohm's Law? (∝ means "is proportional to".) Voltage ∝...
*April 18, 2013 by John*

**electronics**

which of the following statements is a true statement concerning the T-N theorem? #1-the T-N theorem can be applied only to d-c circuit analysis. #2-the T-n theorem can be applied only to a-c circuit analysis #3-the T-N theorem can be applied to circuits containing both d-c ...
*August 24, 2008 by dale mckinney*

**Physics, help please!**

Can the voltage across any of the three components in the R-L-C series circuit ever be larger than the maximum voltage supplied by the AC source? That maximum voltage is 50 volts in this situation. Also, does Kirchoff's loop rule apply to this circuit? In other words, is the ...
*March 2, 2012 by Jim*

**series and parellel circuits**

ok here we go ... its a series-parellel circuit with 5 resistors. 12 volt battery- wire goes up then one wire branches up at 45 deg with a 10 ohm resistor then down at a 45 deg with a 10 ohm resistor, a second wire branches down at 45 deg with a 20 ohm resistor then up at a 45...
*May 21, 2012 by Dave*

**Electronic Timing inc**

Electronic Timing, Inc. (ETI), is a small company founded 15 years ago by electronics engineers Tom Miller and Jessica Kerr. ETI manufactures integrated circuits to capitalize on the complex mixed-signal design technology and has recently entered the market for frequency ...
*March 30, 2010 by babyputra*

**Electricity**

RCL Circuits electricity!? A 50V, 50Hz supply is connected to a series circuit consisting of a resistance, a 20mH inductor and a capacitor. a) Find the value of the capacitance and the power dissipated in the circuit when: (i) The current has a magnitude of 25A and leads the ...
*January 21, 2010 by Claire*

**corporate finance**

Electronic Timing, Inc. (ETI), is a small company founded 15 years ago by electronics engineers Tom Miller and Jessica Kerr. ETI manufactures integrated circuits to capitalize on the complex mixed-signal design technology and has recently entered the market for frequency ...
*March 30, 2010 by babyputra*

**Financial Management**

A small company was founded by 2 electronic engineers, Tom and Jessica, 15 years ago. The company manufactures integrated circuits to capitalize on complex mixed-signal design technology and has recently entered the market for frequency timing generators, or silicon timing ...
*March 9, 2009 by Sandra*

**Physics 2**

Explain briefly the workings of electrical transformer, both step-up and step-down In a step-up transformer, compare the secondary voltage and current to the corresponding primary values. Explain briefly how transformers minimize losses in long distance electrical circuits. ...
*July 28, 2014 by seanmarch58*

**Electrons circuits**

Hi everyone! I'm new in here. Recently I bought a movement monitor which detects micro movement. If the sensor does not detect a movement in 20 seconds, the build-in speaker will beep until the sensor detects a movement. I'm using it for my project and I have a question about ...
*April 4, 2008 by Jacky*

**Physics**

Thanks for any help :) Four 20 ohm resistors are connected in parallel and the combination is connected to a 20V emf device. The current is: A) 0.25A B) 1.0 A C) 4.0 A D) 5.0 A E) 100 E Parallel circuits: I know that the voltage is 20V and the Resistance is 20 V. So, I divided...
*March 15, 2007 by susane*

**Physics- Circuits**

A 100-microCoulomb parallel-plate capacitor is charged with a 24V power supply, then is disconnected from the power supply. a) The plates are moved 0.01 m apart to 0.05 m apart. What happens numerically, to the: i. Capacitance of the device? ii. Potential difference between ...
*April 12, 2008 by Bobby*

**Circuits**

I have to calculate the voltage across the resistor of an rlc circuit where the 4.7nF capacitor is in parallel with the .200 H inductor for different frequencies (starting with 1000 Hz) They appear at the top of the circuit and they both looked to be in series with the 5100 ...
*April 9, 2012 by Heather*

**Physics**

The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the above 2. A magnetic ...
*May 20, 2014 by Liz*

**Physics -- check answers please**

The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the above Would it be d? ...
*May 21, 2014 by Liz*