A 10-nF capacitor is charged to an unknown potential V1 and then connected across an initially uncharged 30-nF capacitor. If the final potential difference across the 10-nF capacitor is 20 V, determine V1=?

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.