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Activity for Lundin‭

Type On... Excerpt Status Date
Comment Post #284890 How exactly is this a question about physics and not about DIY repairs? In order to make this a valid physics question you would at least have to offer some theory of forces, moment, measurements, expected friction and whatever else may be relevant.
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10 months ago
Edit Post #283298 Initial revision about 1 year ago
Answer A: Signal modeling as only digital, only analogue, or as both
It's easy enough to find examples. For example RF OOK modulation can be considered "digital" since it only has two states. Yet at the same time we can vary the carrier frequency, which can be considered "analog". Another example is current loops where analog signals are transmitted as current....
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about 1 year ago
Comment Post #283258 I agree that this is off-topic, it's far-fetched to even call this applied physics. Should be moved to https://electrical.codidact.com/ where the question is on-topic.
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about 1 year ago
Comment Post #280705 At any rate you only need some 10-20mA across your heart to risk a heart stop. DC or AC is irrelevant there. The average 230VAC connector in your home is fused to 15A and can deliver quite a current until the ground fault breaker goes.
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over 1 year ago
Comment Post #280705 "DC is much safer compared to AC" This probably comes from the idea that if you get 230VAC through your muscles, they would repeatedly cramp and make it impossible to move away from the point of contact. Not sure if it's true but I've heard it mentioned many times. At any rate, that such doesn't matt...
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over 1 year ago
Comment Post #280466 Also, I'd be wary about a "post your physics problems" category, it's an open invitation to massive amounts of homework spam. Maybe something more similar to the Challenges category on the Code Golf site?
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over 1 year ago
Comment Post #280466 I think this site should probably rather start with making categories for the various fields of physics that are considered on-topic. For example specific category for Astrophysics or one for Applied Physics might make sense.
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over 1 year ago