John wants his secret clubhouse to have a wall covered with a material that will allow him to see people approaching from around a corner. What kind of material would be best to use? 1. Material that is translucent 2. Material that is reflective 3. Material that is transparent 4. Material that is opaque

Which accounts for an increase in the temperature of a gas that is kept a constant volume

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates