Eyes: A man is nearsighted and cannot see things clearly beyond 110from his eyes. What is the focal length of the contact lenses that will enable him to see very distant objects clearly?

Lenz’s law: A closed, circular loop has a counter-clockwise current flowing through it as viewed by a person on the right, as shown in the figure. If a second closed circular loop with the same radius approaches this loop with constant velocity along a common axis as shown, in what direction will a current flow in the approaching loop as viewed by the person on the right?

Dielectrics: A parallel-plate capacitor has a capacitance of 10 mF and charged with a 20-V power supply. The power supply is then removed and a dielectric material of dielectric constant 4.0 is used to fill the space between the plates. How much energy is now stored by the capacitor?

Ampere’s law: A hollow cylinder with an inner radius of

Thin lenses: It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How far from the lens should the object be placed?

Resonance: For an LRC series circuit containing a resistance of a capacitance of and an inductance of what frequency is needed to minimize the impedance?

Total internal reflection: The speed of light in a material is

Radiation pressure: A 22.0-kg mirror with a surface area of 1.0 m2 and a

Internal battery resistance: In the figure a current of 6.0 A is drawn from the battery. What is the terminal voltage Vab of the battery?

Thin lenses: In the figure, the thin lens forms a real image of the object 94.0 cm from the object. What is the focal length of the lens?