How Much Do Satellites Cost? How Can I See an Overhead Satellite? The Future of Satellites What Is a Satellite? Sputnik 1, the first satellite, shown with four whip antennas Photo courtesy NASA A satellite is any object that moves in a curved path around a planet. The moon is Earth...
The turbines used in a hydroelectric plant look completely different from a steam turbine because water is so much denser (and slower moving) than steam, but it is the same principle. Wind turbines, also known as wind mills, use the wind as their motive force. A wind turbine looks nothing...
The way you measure the performance of a glider is by its glide ratio. This ratio tells you how much horizontal distance a glider can travel compared to the altitude it has to drop. Modern gliders can have glide ratios better than 60:1. This means they can glide for 60 miles if they ...
When the airspeed reached about 17 mph (27 kph), I could feel the hang glider lift me off the ground. As I was lifted, I moved my hands from the sides of the control bar to either side of its base. To fly, I had to do two things: maintain a constant speed and keep my ...
The DJI Mini 2 boasts a top flight speed of 36 mph (57.6 kph) with a maximum flight duration of 31 minutes. It can fly as far as 10km away in perfect conditions. What is the DJI Mini 2 return to home height? Initiating an RTH (Return to Home) command on a drone will prompt it...
The five-to-10-speed transmission on most cars allows them to go 110 mph (177 kph) or faster with an engine-speed range of 500 to 6,000 or higher rpm. Diesel engines have a much slower operating speed than gasoline, and that goes double for the massive ones used in locomotives. The...
A certain metal has a density of 1.78 g/cm cubed. My piece of this metal occupies 545.1 cm cubed. How much mass is there in my piece? How to convert radians to degrees with a formula If two metal balls each have a charge of -10(-6) C and the repulsive force between them is 4...
A hard-disk platter can spin underneath its head at speeds up to 3,000 inches per second (about 170 mph or 272 kph)! The information on a hard disk is stored in extremely small magnetic domains compared to a cassette tape's. The size of these domains is made possible by the precision...
A hard-disk platter can spin underneath its head at speeds up to 3,000 inches per second (about 170 mph or 272 kph)! The information on a hard disk is stored in extremely small magnetic domains compared to a cassette tape's. The size of these domains is made possible by the precision...
You can use this number to calculate how much force it takes to push a tire down the road. The CRF has nothing to do with how much traction the tire has; it is used to calculate the amount of drag or rolling resistance caused by the tires. The CRF is just like any other ...