In Einstein’s theory regarding the existence of gravitation, how does he describe space? What causes the attraction between space bodies?my subject is earth science.
In most jurisdictions it is illegal to park a car within a certain distance of a fire hydrant. In North America the distances are commonly 3 to 5 m or 10 to 15 ft, often indicated by yellow or red paint on the curb. In the UK, yellow lines are used to keep cars from parking over underground hydrants. Parking restrictions are sometimes ignored (especially in cities where available street parking is scarce), however these laws are usually enforced. The rationale is that hydrants need to be visible and accessible in an emergency.`
You can have a security system in your house without a phone line, but if you want the system to notify a security company when there is an intruder etc then I believe you do need a phone line or possibly at least an internet connection. I'm not aware of any that work with cell phones and if you are out with your cell phone anyway, the system would never be able to use the phone to make the call.
