How many homes can the world’s largest offshore wind farm power in an hour?

Factful math: Grade 4th-6th

Math skills: Multiplication

Related Environmental issues: renewable energy

The world’s largest offshore wind farm Hornsea 2 in the UK has 165 wind turbines.

A single rotation of a wind turbine takes 6 seconds and generates energy to power a home for a day. How many homes can the Hornsea 2 wind farm power in an hour of operation? 

  1. 1,650 homes
  2. 9,900 homes
  3. 99,000 homes

ANSWER  3

1 hours = 3600 seconds

A wind turbine rotates [3600/6=600] times in an hour.

A wind turbine generates energy to power 600 homes in an hour.

There are 165 wind turbines in the Hornsea 2 wind farm, so the wind farm can generate energy to power [600 x 165 =  99,000] homes in an hour.

Source: BBC. Hornsea 2: North Sea wind farm claims title of world’s largest [https://www.bbc.com/news/science-environment-62731923].

 

How many COVID-19 vaccines does California still have?

[FACTFUL MATH] Grade level: 4 – 6th grades

Math skills: Percentage / ratio

Related Environmental issues: Covid-19

About 72.5% of the Covid-19 vaccines distributed haven’t been used in California yet.

About 975,000 vaccines were used in California as of January 14, 2021. How many  vaccines did California have in the beginning?

1) 35 thousand

2) 2.7 million

3) 3.5 million

4) 27 million


Answer: 3

975,000 vaccines account for 27.5% of the total vaccines.

975,000/27.5 = X/100

X=975,000 x 100 / 27.5

X≅3,545,454

Source: USA Today, January 15, 2021 : https://www.usatoday.com/in-depth/graphics/2021/01/14/covid-vaccine-distribution-by-state-how-many-covid-vaccines-have-been-given-in-us-how-many-people/6599531002/)


Factful Environmental Math Problems (2020)

Just published and now available from Amazon  (paperback)

About this book

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

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Published: March 26, 2020

Price: $6.25