Which statement best describes the importance of joints in the roadways of Bridges ? a. Joints strengthen the roadway to support cars and trucks

b. Joints allow the roadway to expand and contract with varying outside temperatures

c. Joints allow the roadway to expand and contract as cars put force on the bridge

d. Joints allow the bridge to be built in smaller, easier to assemble pieces.

Positive ions differ from neutral atoms in that

Why should the wavelength scale of spectroscope be calibrated

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?