Ancestors

Written by Robbie 🇧🇪 :tux: on 2024-12-20 at 07:42

Electric car drivers often boast that their electric car can do around 4 miles (6.4km) per kWh.

My electric moped does slightly better ;) Over 32km per kWh in cold wet weather. Today my odometer will pass 6000 km. Using the same amount of energy my ICE car (+- 5l/100km) would have been able to drive about 395 km.

=> View attached media

=> More informations about this toot | More toots from deightonrobbie@mastodon.green

Written by Robbie 🇧🇪 :tux: on 2024-12-20 at 08:37

And I just discovered something annoying: The screenshot above says "465Wh total power". Looks like the developers and the people that sign off on the app don't know the difference between power and energy 🤣

=> More informations about this toot | More toots from deightonrobbie@mastodon.green

Written by Jonathan Schofield on 2024-12-20 at 08:55

@deightonrobbie my ability to parse quanities of electrical energy and power is roughly where my understanding of the term entropy used to be. Which is to say, thoroughly confused.

I wish I had paid attention in Physics at school. But unfortunately the physics teacher made it as dull af and could not control the classroom

=> More informations about this toot | More toots from urlyman@mastodon.social

Written by Robbie 🇧🇪 :tux: on 2024-12-20 at 09:00

@urlyman I taught myself the difference using a simple trick:

For power there's a unit everyone knows about. The number of horsepower a car makes. You need a big engine or motor if you need to produce a lot of power.

If you continue this way of thinking then energy is the amount of grass in the horse's stomach (or tank or battery)

If the horse runs (using a lot of power) then it needs to replenish the energy faster than if it walks

=> More informations about this toot | More toots from deightonrobbie@mastodon.green

Written by Jonathan Schofield on 2024-12-20 at 09:06

@deightonrobbie thanks. I get the difference between energy and power. It’s electrical units of measurement I struggle with

=> More informations about this toot | More toots from urlyman@mastodon.social

Written by Robbie 🇧🇪 :tux: on 2024-12-20 at 09:20

@urlyman I understand. I had the same problem for a long time. If the unit has "h" (hour) in it then it can only be energy, because power doesn't have a time component. It is measured at a single moment. So Wh, kWh and mWh are always units of energy.

=> More informations about this toot | More toots from deightonrobbie@mastodon.green

Toot

Written by Robbie 🇧🇪 :tux: on 2024-12-20 at 09:21

@urlyman I find it more confusing that there are so many different units used, BTU, calorie, joules, kWh etc. The most confusing is calorie, because in some countries they use the term calorie when they actually mean kilocalorie, so there can be a factor 1000 difference by people using the exact same term!!!

=> More informations about this toot | More toots from deightonrobbie@mastodon.green

Descendants

Written by Jonathan Schofield on 2024-12-20 at 09:22

@deightonrobbie yes indeed

=> More informations about this toot | More toots from urlyman@mastodon.social