Arubber ducky is placed 20 cm from a thin convex lens with a focal length of 15 cm. which statement correctly describes the nature and position of the image formed of the rubber ducky? a) real and upright on the side of the lens opposite the rubber ducky. b) real and inverted on the side of the lens opposite the rubber ducky. c) imaginary and upright on the side of the lens opposite the rubber ducky. d) imaginary and inverted on the same side of the lens as the rubber ducky.

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

What are some properties of transverse waves?

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?