The Moon Distance Calculator shows approximate times for when the Moon is closest to the Earth (perigee) and furthest from the Earth (apogee).
The cycle of the moon's phases is relatively constant, but, due to its elliptical orbit, its distance from the Earth is not. Over the course of a month, the moon moves between its closest distance to Earth (perigee) and its farthest distance to Earth (apogee). This means that the moon...
After a rocket launches straight up, the rocket control mechanism uses the inertial guidance system (see sidebar) to calculate necessary adjustments to the rocket's nozzles to tilt the rocket to the course described in the flight plan. In most cases, the flight plan calls for the rocket to ...
Simply track the rocket to its highest point, tilt the homemade inclinometer so that you're looking at the apogee point through the straw, and pinch the string to the protractor once the string stops moving. Subtract the number on the protractor from 90 and you have the angle you need for...
By combining these two probabilities, it's possible to calculate the rough odds of a blue moon coinciding with a supermoon to create a super blue moon. If you combine the 3% chance of a blue moon occurring in a given month with the 25% chance of a supermoon, you get a ~1% chance ...
3. A review of how to calculate and use ordered derivatives when building complex intelligent systems. I first proved the chain rule for ordered derivatives back in 1974, as part of my Harvard PhD thesis. The concept propagated from there in many directions, sometimes called “backpropagation,”...
Companies such as Apogee and Mackie, among others, have adopted the Yamaha wiring standard for their AES/EBU I/O. The wire is the same as that used for the Tascam digital snakes but the pin configuration is much different. In this case, the ground wires are on one side of the connector...
After a rocket launches straight up, the rocket control mechanism uses the inertial guidance system (see sidebar) to calculate necessary adjustments to the rocket's nozzles to tilt the rocket to the course described in the flight plan. In most cases, the flight plan calls for the rocket to ...
Understand what the law of conservation of mechanical energy is and how mechanical energy can change forms. Learn what the law of conservation of mechanical energy formula is and how to use it to calculate examples of mechanical energy conser...
These deviations are used to calculate an equivalent elliptical landing area. The Future As improvements in aerodynamic design continue, golf balls will be able to go even further. In fact, one golf ball manufacturer is already advertising that its balls can be driven 400 yards. However, some ...