How far must you stretch a spring with k = 2000 N/m to store 210 J of energy?

What is the momentum of a 2 kg object moving at 15 meters per second

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)

What part of the ear is names after tools, such as the hammer and the anvil?