Two small objects, with masses m and m, are originally a distance r apart, and the gravitational force on each one has magnitude f. the second object has its mass changes to 2m, and the distance is changed to r/4. what is the magnitude of the new gravitational force

Which accurately compares concave and convex lenses?

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?