I'm bring my Model S to my 4th grade daughter's school tomorrow to show it off as part of her STEM school's energy section discussion. It will be a pretty quick show and tell, but in an effort to have some sort of educational content I wrote a brief quiz. I'm sharing here in case anyone else might be interested in using my quiz as a starting place. Some of the questions are over the heads of 4th graders, but the teacher feels they can work through the more difficult ones together in class. They work on iPads so can use calculators when needed.
Might be nice to share other question suggestions/tips in this thread, be sure to include the answers!
Tesla Model S Quiz:
1) A Tesla Model S has an 85kWh battery pack (85,000 Wh) and 7100 individual battery cells. What is the approximate wattage (Wh) of each cell? 85000 Wh/7100 cells= ~12 Wh/cell
2) A Tesla Model S can travel approximately 250 miles with the 85kWh battery. How many Wh of energy are required to travel 1 mile (approximately)? 85000 Wh/250 miles= 340Wh/mi
3) Using the answers for #1 & #2, how far could a Model S travel with the energy in one cell(theoretically)? 12 Wh/340 Wh/mi = 0.035 mi (0.035 mi x 5280 ft/mi = 186 ft.
4) What sort of things would cause you to not be able to travel 250 miles on a charge? Lots of possible answers-things that increase energy use (heater, air conditioner, stereo, headlights, etc.), Environmental conditions (wind, rain, snow, rough roads/dirt roads), low tire pressure (increased rolling resistance), heavy loads (more mass to move), driving up hill, driving fast, etc.
5) What sorts of things would allow you to travel more than 250 miles on a charge? Slower speeds, downhill travel, lighter loads, properly inflated tires, less ‘vampire’ electrical usage (no AC or heat), tail wind, etc.
6) A Tesla Supercharger can charge a Model S at approximately 90kW/h. How long would it take to recharge an 85kWh battery from empty to full with a Supercharger(minutes)? 85 kWh/90kW/h = 0.94 hour = 0.94 hours x 60 min/hour = 57 minutes
7) A Tesla High Power Wall Charger (smaller home based) charges at 20kW/h. How long would it take to charge an 85kWh battery from empty to full with a HPWC (hours)? 85 kWh/20kW/h = 4.25 hours
8) A Tesla Universal Mobil Charger (UMC) charges at 1kW/h using a standard 110V AC wall outlet. How long would it take to charge an 85kWh battery from empty to full using the UMC with an 110V wall outlet (days)? 85 kWh/1 kW/hr = 85 hours/24 hours/day = 3.5 days !
9) What sort of electricity does a Tesla Model S lithium ion (Li ion) battery use? AC or DC?
10) What sort of electricity do we get from a standard wall outlet/home electricity? AC or DC?
11) Amarra is a hypermiler, which means she drives very carefully and efficiently to get the most possible distance from her car for the least amount of "fuel". If she averages 280 Wh/mile how far should he be able to drive with the 85 kWh battery starting with a full charge? 85000 Wh/ 280 Wh/mile = 303.5 Miles.
12) Amarra's dad, Dr. Fusco, drives too fast and passes other cars all the time. He only averages 400 Wh/mile, how far would he be able to go with the 85 kWh battery starting with a full charge? 85000 Wh/ 400 Wh/mile = 212.5 miles
Wh=Watt Hours (a measure of electrical energy equivalent to a power consumption of one watt for one hour.)
kWh=kilowatt hours (1000 watt hours)
hypermiling=driving using special techniques to maximize the range of a vehicle per unit of fuel (gas, diesel, electricity, etc.)
1 Mile = 5280 feet
Might be nice to share other question suggestions/tips in this thread, be sure to include the answers!
Tesla Model S Quiz:
1) A Tesla Model S has an 85kWh battery pack (85,000 Wh) and 7100 individual battery cells. What is the approximate wattage (Wh) of each cell? 85000 Wh/7100 cells= ~12 Wh/cell
2) A Tesla Model S can travel approximately 250 miles with the 85kWh battery. How many Wh of energy are required to travel 1 mile (approximately)? 85000 Wh/250 miles= 340Wh/mi
3) Using the answers for #1 & #2, how far could a Model S travel with the energy in one cell(theoretically)? 12 Wh/340 Wh/mi = 0.035 mi (0.035 mi x 5280 ft/mi = 186 ft.
4) What sort of things would cause you to not be able to travel 250 miles on a charge? Lots of possible answers-things that increase energy use (heater, air conditioner, stereo, headlights, etc.), Environmental conditions (wind, rain, snow, rough roads/dirt roads), low tire pressure (increased rolling resistance), heavy loads (more mass to move), driving up hill, driving fast, etc.
5) What sorts of things would allow you to travel more than 250 miles on a charge? Slower speeds, downhill travel, lighter loads, properly inflated tires, less ‘vampire’ electrical usage (no AC or heat), tail wind, etc.
6) A Tesla Supercharger can charge a Model S at approximately 90kW/h. How long would it take to recharge an 85kWh battery from empty to full with a Supercharger(minutes)? 85 kWh/90kW/h = 0.94 hour = 0.94 hours x 60 min/hour = 57 minutes
7) A Tesla High Power Wall Charger (smaller home based) charges at 20kW/h. How long would it take to charge an 85kWh battery from empty to full with a HPWC (hours)? 85 kWh/20kW/h = 4.25 hours
8) A Tesla Universal Mobil Charger (UMC) charges at 1kW/h using a standard 110V AC wall outlet. How long would it take to charge an 85kWh battery from empty to full using the UMC with an 110V wall outlet (days)? 85 kWh/1 kW/hr = 85 hours/24 hours/day = 3.5 days !
9) What sort of electricity does a Tesla Model S lithium ion (Li ion) battery use? AC or DC?
10) What sort of electricity do we get from a standard wall outlet/home electricity? AC or DC?
11) Amarra is a hypermiler, which means she drives very carefully and efficiently to get the most possible distance from her car for the least amount of "fuel". If she averages 280 Wh/mile how far should he be able to drive with the 85 kWh battery starting with a full charge? 85000 Wh/ 280 Wh/mile = 303.5 Miles.
12) Amarra's dad, Dr. Fusco, drives too fast and passes other cars all the time. He only averages 400 Wh/mile, how far would he be able to go with the 85 kWh battery starting with a full charge? 85000 Wh/ 400 Wh/mile = 212.5 miles
Wh=Watt Hours (a measure of electrical energy equivalent to a power consumption of one watt for one hour.)
kWh=kilowatt hours (1000 watt hours)
hypermiling=driving using special techniques to maximize the range of a vehicle per unit of fuel (gas, diesel, electricity, etc.)
1 Mile = 5280 feet