In the Middle of Nowhere: Choosing Between Two Wires & a 12V Battery

AI Thread Summary
In a dire situation in the desert, an individual faces the challenge of connecting a 12V battery to an emergency transmitter without clear polarity indicators. The risk of damaging the transmitter with incorrect wiring adds urgency to the decision. A request for assistance is made, but there are restrictions on sharing answers to prevent academic dishonesty. The discussion emphasizes the importance of problem-solving in critical situations. Ultimately, the focus remains on finding a safe and effective solution to ensure rescue.
dave101a
Messages
1
Reaction score
0
I am lost in the middle of a vast desert in my swim shorts. There is nothing anywhere around me as far as you can see. In front of me is a 12volt battery (say lead acid) with no markings or other indicators of polarity. there are 2 wires long enough to make a connection to the emergency tranmitter next to it, also 12 volt. If it is wired up wrong the transmitter will be destroyed instantly. If it is done right, then i will be rescued. How can i make the right choice.
 
Engineering news on Phys.org
dave101a said:
I am lost in the middle of a vast desert in my swim shorts. There is nothing anywhere around me as far as you can see. In front of me is a 12volt battery (say lead acid) with no markings or other indicators of polarity. there are 2 wires long enough to make a connection to the emergency tranmitter next to it, also 12 volt. If it is wired up wrong the transmitter will be destroyed instantly. If it is done right, then i will be rescued. How can i make the right choice.

I know the answer. PM me your answer to this so I can unlock the thread and let others answer. If this is homework or schoolwork, we can't let others give you the answer unless we know that you already have figured it out.
 

Thread 'Query on Isentropic relationships (such as PV^gamma = constant)'

Hi all, I have a question. So from the derivation of the Isentropic process relationship PV^gamma = constant, there is a step dW = PdV, which can only be said for quasi-equilibrium (or reversible) processes. As such I believe PV^gamma = constant (and the family of equations) should not be applicable to just adiabatic processes? Ie, it should be applicable only for adiabatic + reversible = isentropic processes? However, I've seen couple of online notes/books, and...
View full post »
Thread 'How can I find the cleanout for my building drain?'

Thread 'How can I find the cleanout for my building drain?'

I am a long distance truck driver, but I recently completed a plumbing program with Stratford Career Institute. In the chapter of my textbook Repairing DWV Systems, the author says that if there is a clog in the building drain, one can clear out the clog by using a snake augur or maybe some other type of tool into the cleanout for the building drain. The author said that the cleanout for the building drain is usually near the stack. I live in a duplex townhouse. Just out of curiosity, I...
View full post »

Thread 'Dry sump pump issue'

I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a three stage pump (one pressure and two scavenge stages). The two scavenge stages were connected at times to any two of the three AN fittings on the tank. Recently I tried an upgrade to a four stage pump...
View full post »

Similar threads

Can I Charge Two 12V Batteries in Series While Using a 24V Starting Circuit?
Replies
7
Views
20K
Magnetic field from two wires distance
Replies
25
Views
16K
Understanding the behavior of E fields inside wires
Replies
1
Views
2K
Which Chooses Fate: The Lady or the Tiger?
Replies
8
Views
6K
Do Movies Teach Us Realistic Life Skills?
Replies
1
Views
10K

Hot Threads

Recent Insights

Back
Top