How Many Calories Are You Really Burning?
Since I spend most of my time on my feet, I figured I could teach him something about walking ... actual calorie burn of 12 men and 12 women while running and walking 1,600 meters (roughly a mile) on a treadmill. Result: The men burned an average of ...
Does Earth Have Many Tiny Moons?
How many moons do you see ... orbiting between 5 and 10 times the distance between Earth and the Moon. And there could be a thousand smaller ones as well, up to 10 centimeters wide. So if these moons are indeed out there, why don’t we know about them?
Pi Day: How 3.14 helps find other planets, and more
A favorite holiday among geeks, March 14 commemorates one of the most fundamental and strange numbers in mathematics. It's also Albert Einstein's birthday. This is a great excuse to bake pies, as many ... numbers between 1 and 1,000.
How Many Leaves Are On This Tree?
I can also estimate the volume of this small pile to get the leaf volume density (leaves per cubic meter). So, how many ... 50 leaves. How big is this pile? Let me estimate that this pile of leaves is a sphere (spherical leaf pile) with a radius of 7 cm.
How Much Does It Cost to Power Your Christmas Lights?
So, of course I want to estimate how much money these ... they are about 16-gauge wire inside with a diameter of 1.291 mm. So, let’s say I have 1 cm of this wire. What resistance would it have? Using the resistivity of copper (ρ), I can find the ...