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...
Millitorrs are generally called "microns". It is assumed among refrigeration engineers that during vacuumation processes the oils in systems worked upon, themselves, do not boil - no matter how high vacuum would be achieved. I am in doubt.
Water evaporates slowly at all temperatures, and the evaporation increases with water temperature increase, but the "boiling" starts at the point the water temperature reached 100 degrees Celsius at atmospheric pressure.
Is it feasable to achieve elavation of water to, let's say, 10 m height due to the capillary action effect ? Or the capillary diameter for that to achieve should be less than the water molecules themselves ?
I have never heard about a plan of cosmic objects endangering Earth to be directed towards the Sun in order to get rid of them. It is unfeasable ? "Sun wind" blowing from the star is stronger than its gravitation ?
Am I assuming right the pressure in a vessel holding two substances (both being in the both liquid and gas states) will be equal to the saturation prerssure of the one which has the higher SP ? That is, for substance A whose SP at a given temp. is 10 B, for instance, and substance B whose SP is...
You are correct. It is always assumed so as you say, but in reality the "loss in copper" current starts immediately the emf is applied.
What is form of the current on oscilloscope ? (I have never had an access to one) A slope of the resistive current, then the sine of the magnetizing current...