A pressure transducer has an output impedance of 120 and is to be connected to an amplifier. What must be the minimum impedance of the amplifier if we want to keep the loading error less than 0.1%?

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?