If 6 J of work is needed to stretch a spring 10 from 10 cm to 12 cm and another 10 J is needed to stretch it from 12 cm to 14 cm. What is the natural length of the spring?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

The statue of liberty is 305.5 feet high. when the angle of elevation of the sun is 50 , what is the distance to the tip of the shadow from a point at water level and directly below the highest point of the statue?

How much heat is needed to raise the temperature of 5g of water by 16°c?