Contents
What is the answer to the hanging cable problem?
The cable therefore is hanging directly downward! The cable has to be doubled back upon itself, and the two poles must be coincident and 0 m apart! This part is actually a trick question: the two poles are a distance of 0 apart. No physics was required to solve this one, just logical thinking!
Should I remove coaxial cable?
The National Electrical Code requires that cabling must be removed if it isn’t properly tagged for future use. It also is not uncommon that, as new tenants prepare a space before move-in, they need an electrical contractor to remove cables they don’t plan to use.
What causes cable problems?
Some of the main causes of cable failure include: Ageing: The ageing process usually results in embrittlement, cracking and eventual failure of the insulating and sheathing materials, exposing the conductor and risking a potential short circuit, a likely cause of electrical fire.
Is a hanging cable a parabola?
It is often said that Galileo thought the curve of a hanging chain was parabolic. In his Two New Sciences (1638), Galileo says that a hanging cord is an approximate parabola, and he correctly observes that this approximation improves as the curvature gets smaller and is almost exact when the elevation is less than 45°.
How do you calculate a catenary?
Precisely, the curve in the xy-plane of such a chain suspended from equal heights at its ends and dropping at x = 0 to its lowest height y = a is given by the equation y = (a/2)(ex/a + e−x/a). It can also be expressed in terms of the hyperbolic cosine function as y = a cosh(x/a).
Can I remove cable from my house?
A: Cable and phone wires don’t carry current, so it’s safe to remove them. However, it’s critical not to cut into a power line, as you know. Find it by doing a Web search for the words “Pepco equipment responsibility.” The wire to your house is Pepco’s responsibility; past the weather head, it’s yours.
Why does a cable hang down on a power line?
When a cable is supported by the two ends, it will hang down a bit depending on the tension in the cable. How can you model this cable sag with a computer? Save this story for later.
Why do I have an exposed cable in my house?
Get answers to commonly asked questions about unburied wire, cable installation, and repairs. When will my installation or repair be completed? Why do I have an exposed cable?
What does loose cable between house and utility pole mean?
Loose cable between house and utility pole – who s… Loose cable between house and utility pole – who should fix? After some recent stormy weather, the end of the overhead cable attached to my house (from a nearby utility pole) is hanging loose with wires and connectors exposed.
How are cable wires removed from your home?
I was told that wires aren’t removed from homes, the service is turned off from the office, unless requested by the customer at the time they request the service be ended. The new cable company installs their own wires so now we have homes with multiple wires going to them which is not only an eyesore, but also a hazard if they come loose.