Module Gps

I am stuck on these physics problems please help!?

On Apollo missions to the Moon, the command module orbited at an altitude of 157 km above the lunar surface. How long did it take for the command module to complete one orbit?
h

use v^2 = GM/r

v = root GM/2r

orbit = 2 pi r

for part 2 use suvat equations, s=vu+.5at^2 etc and it should fall out

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Over the past two years, the cost of installing a GPS vehicle navigation has declined considerably, and the inevitable result of this, more and more people are taking advantage of it, to make it easier to know where they go, plan your trips and track where are.

Satellite navigation dates back much longer than many people own. The principles behind Satnav were tested in 1967 but took almost 30 years before the NAVSTAR GPS system first began to function as a military application in mid-1990. Civilian use of GPS navigation was available shortly after the military launched, but the initial costs of using the system were high, and requires ongoing subscription fee. The first people who took advantage GPS were pilots, and experts, who needed to be able to measure distances with pinpoint accuracy. In the early days, an affordable GPS navigation system for cars out of reach for the car owner average.

Over time, the costs of GPS navigation systems of automobiles has declined considerably, and an increasing number of applications and data they provided in our daily lives. Manufacturers like Garmin and TomTom GPS signals have been combined with information data existing maps and complex mathematical algorithms to create systems that can be used for navigation on roads and highways.

These navigation systems Car GPS can be installed on any vehicle in minutes, and then be used to plan trips, and keep track of where you are to let lost on the roads. When combined with other information such as news channel traffic, GPS navigation systems can warn car drivers about road congestion and provide alternative routes in real time to ensure that anyone with a GPS needs are stuck in a queue again.

There is a number of different styles of GPS navigation systems for cars available to meet individual needs, from basic models up expensive systems high accuracy and capable of handling large amounts of data and provide users with the purpose of giving information about where they are.

The type simple GPS navigation system for cars is a removable appliance that stores map data internally, and uses a satellite signal to locate the position of the unit. By combining data from maps and satellite signal, routes can be planned, and the user can find their way, while seeing a graphical representation of your route on a small screen. These systems GPS car navigation can be removable or fixed in the car. Many new models really integrate the GPS into the dashboard, while fixed systems can be mounted on the dash, or attached to the windshield with a suction cup.

Thus as a dedicated car GPS devices, you can also buy a large number of other devices with GPS and a built-in. Some may have a PDA GPS module GPS connected to them, and used in cars, and a growing number of cell phones have GPS as a standard feature. Taken together, although these devices have GPS built in, it is not the same quality as a dedicated system and cunning that can help you know where it is not going to provide accurate data, or be able to plan travel routes, and one of custom systems from Garmin or Magellan.

At the top of the list of GPS navigation systems for automobiles, there are a number of fantastic options available. Many of the cars high end GPS navigation systems include a number of features to make move as simple and convenient as possible.

Besides the standard information on the maps and the positions of these GPS systems can also provide information about local services such as gas stations, motels, and even control of speed cameras in certain countries. More expensive GPS navigation systems automobile have the ability to load additional maps for systems that can be used in different countries, and through the use of local radio services, provide global traffic information to drivers anywhere in the world is.

If you want a simple GPS navigation system to help car to avoid traffic problems in his hometown, or a cross country driver who needs long-range planning flexibility to get from A to B as efficiently, there is a GPS system available to suit your needs.

About the Author:

Jason has been in the construction equipment and industrial sales business for over 10 years. He owns and operates Red Hill Supply to better serve the automotive and industrial industries. –
Automotive Tools
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Article Source: ArticlesBase.com – GPS Auto Navigation Systems