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You don't mention what device, but the answer is probably NO. 50hz and 60hz signals will act differently in reactive components such as transformers, coils, capacitors, etc. Paulev is correct that it would act differently on inductive/reactive devices, especially transformers. The device to be discussed here is the transformer as it is most present in all electronic equipment. Based on theories, a 50Hz transformer will perfectly work on a 60Hz Power system but not vice versa. Assuming the transformer's specs are, P=1kVA, L=1H, R~0 ohm. At 50Hz the impedance will be Z=sqrt(Inductive Reactance=2 x Pi x 50 x L), thus the ampacity (Ip=sqrt(P/Z)) of the magnetic wire at the primary is 1.79A. Using the same steps at 60Hz. The current drawn by the the transformer will be 1.63A which is within the ampacity of the magnetic wire. therefore a 50Hz appliance can be used on a 60Hz supply without any problem.
Read the label on the container. The light bulb will be rated "B-10" life. This refers to a statistical number value. "B-10" Life is the average life span a bulb will last for 90% of those tested. If you went purely by the "average" time to burn out, then that is not specific. One brand of light bulbs can have a higher Average. But if it has a lot of scatter in the data, then that would mean some bulbs could fail much earlier and some much later. On the other hand, if you determine a bulb has a X hour "average" life with a minium scatter factor, then more of the bulbs will perform closer to the average. Read the label on the box.
Between 1h and 1h 20m
aziz
1h = 3600s 25200s x 1h/3600s = 7h
Yes, it is correct to say a video is 1 hour and 15 minutes long.
1h = 3600s 25200s x 1h/3600s = 7h
1h = 60min 477min x 1h/60min = 7.95h = 7h 57min
1h = 60min 4000min x 1h/60min = 666.66667h = approx. 666h and 40min
1h = 60min 1290min x 1h/60min = 21.5h
1h = 3600s 1km/h x 1h/3600s = 0.00027778km/s
1h = 60 min so 1h and 20 min = 60 + 20 = 80 min
Greenwich +1h
1h 20min