My scooter powered by 24V 7AH battery, the (brushed) motor 250 W runs 4 mi. I have added more 7AH batteries (so 14AH now), so am having now 8 mi range.
But how on earth anything powered 48V 4.4AH, the (even brushles) motor 700W could run 10 mi (let alone 13mi) ?
Ads say a gyroboard with the battery 48V 4.4AH, and the motor 700 Wt will run for 2 hours at the speed of 20km/h ! But - simple physics - will not the motor drawing about 10-15 Amp exhaust the battery in just some 20 minutes !? Do ads lie ?
2 statements from an article :
"WHO standards for occupational exposure to inorganic mercury are currently 50 µg/m3 in air ......
WHO's maximum acceptable daily intake (ADI) for mercury is 40 µg/day."
An average person inhaling 20 m3 of the air containing 50 µg/m3 of mercury, inhales...
I mistakenly put it otherwise so, more precisely - according to the reference - it should be :
0.999808 at 0 °C
0.958593 at 100 °C - about 4 % of the initial value
But the volume will increase just 2 %
Maybe there is square root relation ?
Water density at 0 C is 990 kg/m3.
Water density at 100 C is 1030 kg/m3 - 1 m3 of water "loses" about 4 % of its mass.
Water expansion rate is 1.0002 for each 1 C increase in temperature - 2 % for the above rise from 0 C to 100 C..
How comes that water density decreases 4 % but its volume...