The effort applied = 200 N
<h3>Further explanation</h3>
Equilibrium :

Total length = 1.75
The distance between the fulcrum and the load is 0.5 m ⇒ d₁=0.5 m
The distance between the fulcrum and the force applied :

A load of 500N ⇒ F₁=500 N
The force applied :

It's solubility. Solubility is a measure of the ability of a solute to dissolve in a solvent; maximum amount of solute that will dissolve in solvent at a specific temperature. Solute is substance being dissolved. Solvent is the substance that is doing the dissolving; the part of the solution that is present in the greatest quantity.
Answer:

Explanation:
The magnetic field B inside long solenoid with current I is given as

where
N is number of turn of solenoids = 1140 turns

I is current that passes through solenoid
L is length along which current pass = 0.350 m
plugging value to get required value of current


Because when a candle burns the wax is burning off so as its heated more and more wax is lost and if more wax is lost... Obviously it means that the candles mass will be lower :)