Loose or damaged battery cable perhaps.
well normally it takes 44 seconds on an average for 1 of them to do it. So it would be: 44x4=176 seconds=3 minutes and 33 seconds (aprox)
Power is calculated by dividing the work done in Joules by the time taken in seconds. So, if x Joules of work are done in 10 seconds, the power used would be x/10 watts.
uninterruptible power supply
87.5mi/hr2
Try plugging the iPod into your computer as you would normally charge it. If this does not work, hold the Home button and the Sleep/Wake (power) button simultaneously for 6 seconds, and then see if it turns on. If it does not come on, something might have shorted the iPod's circuitry.
The power needed would depend on the force required to move the piano and the distance it is moved in 5 seconds. Without knowing these factors, an accurate estimate cannot be provided.
The power used would be 60 watts. This can be calculated by dividing the work done (600 joules) by the time taken (10 seconds).
its faulty
An N.C. contact is 'Normally closed'. This applies to relays (electronic switches). You can use either a normally closedcontact or a normally open contact to do what you need, provided the relay has both and depending on your situation. Here's a recent example of mine: A building's fire alarm is wired to the HVAC system to shut down ventilation in case of a fire. In this case we want the HVAC to have power normally but remove power (with the relay) during a fire alarm. We would connect the HVAC power to the relay's N.C. (normally closed) contacts, because they are exactly that: normally closed. This would allow the HVAC to function. When power is applied to the relay, it would switch contacts, disconnecting power to the HVAC. An important note is that contacts and other electrical connections that can change condition (such as a relay) are described in a de-energizedstate. Thus, the N.C. contacts are normally closed, while the power to the relay is off. Likewise, a N.O. contact is open with relay de-energized but will close upon supplying power to the relay.
The light should be on before starting, and for 3 seconds after starting, as a bulb check.
You have to give it the plates you find. He changes to the type that it would normally boost the power of.
Depends on what caused the power to go off, could be seconds or it could be days.