bed frame
A box-spring (sometimes referred to as a bed base) is a hard sturdy wooden frame. Usually the box-spring is placed on top of a wooden or metal bedframe which sits on the floor and acts as a brace.
Displacement and acceleration are zero at the instant the mass passes through its "rest" position ... the place where it sits motionless when it's not bouncing. Velocity is zero at the extremes of the bounce ... where the expansion and compression of the spring are maximum, and the mass reverses its direction of motion.
The fulcrum is the part that the bar sits on to form a lever. The output arm is the part that the load sits on.
potential
Heat energy
An underlay is a cloth that is placed under something. The most common form of underlay is a bed skirt that sits between and mattress and a box spring of a bed.
If you have a set of box springs you should replace them when you get a new mattress as they wear out. If you have a foundation (rigid platform) and it is in good repair and sits flat you will get just as long a wear out of your new mattress as you will with a new foundation. It will probably void your warranty, but if you bu a decent mattress and take care of it you most likely will have no issues. You should not use a box spring with a bed designed for a foundation as it will wear prematurely. over 90% of the beds made today have foundations. Also a bed designed for a box spring should not have a foundation used on it. The innerspring on a platform and box spring bed are designed differently.
You should bu some firm mattress that can be memory foam or innerspring mattress. Normally soft mattresses sink when someone sits upon them.
Elephants stand on a trapezoid in a circus.
A platform bed is a wooden frame with drawers in it that the mattress sits on top of. This is a great space saving item.
It is called ozone layer. It sits in the stratosphere.
A gromet is a thing that sits in your ear
It usually sits on a mouse pad or just on a table
It is actually very easy! All you need is a Phillips screwdriver. Unscrew the drop-side rail and take it completely off. Then take the mattress off, and lower the platform that the mattress sits on to the lowest level. That's it!
It is called an atlas
if you are talking about where a pilot sits in a plane he sits in what's called the cockpit
With regular dry cell batteries, the flat negative (-) side always sits against the spring.