Two objects, each of weight w, hang vertically by spring scales as shown in the figure. the pulleys and the strings attached to the objects have negligible weight, and there is no appreciable friction in the pulleys. the reading in each scale is

a: more than 2w.
b: less than w.
c: more than w, but not quite twice as much.
d: w.
e: 2w.

D: W.

Explanation:

For an ideal spring connected to weight W

Now here since both sides we have same weight connected  so the system will always remains at rest

So here we have

so here acceleration will be zero for the given system

now we can find the tension force in the string on each side as

so here tension on string on side will be same and it is equal to W

so the reading will of the scale is W

power out to power in less than 100%

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d