Posts Tagged ‘every’

How can I stop my German Shepherd breaking out of her dog lot every time she hears a gun shot?

Thursday, December 27th, 2012

Question by Chase: How can I stop my German Shepherd breaking out of her dog lot every time she hears a gun shot?
Every time I or one of the neighbors fire a weapon, my dog tries to break out. She has gone over electric fences (shocking herself in the progress) and she has even gnawed through boards and some types of fencing. I have tried punishing her every time she did got out, but that didn’t work at all. She is fully bred and 5 years old. The caliber of the firearm doesn’t matter. 17s and 22s are enough to make her try to escape.

Best answer:

Answer by Ruby Merle
She’s TERRIFIED! Stop shooting guns near her! Jeez!

Know better? Leave your own answer in the comments!

a model electric train makes one complete pass around a circular track every 15 seconds….?

Wednesday, October 31st, 2012

Question by moniquew93: a model electric train makes one complete pass around a circular track every 15 seconds….?
a model electric train makes one complete pass around a circular track every 15 seconds. the train’s motor has a resistance of 6.0ohm and is connected to a 70.0V source. How much energy will the train use in 12 complete passes around the track?

Best answer:

Answer by kirchwey
This question cannot be answered. Model-train motors don’t draw the huge wattage implied by the voltage and resistance, which = V^2/R = 816.67 W. At running speed the motor would generate a back EMF which would substantially reduce the actual voltage across the internal resistance. See the ref.
EDIT: The input data are not necessarily crazy, just incomplete. What’s crazy is the assumption that the given V is applied across the given R continuously; it actually would only happen momentarily at startup.

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