three grams of water (3.00 cm^3) at 24 C is converted to volume 185 of steam at constant atmospheric pressure. what is the change in internal energy of the system

Three point charges, two positive and one negative, each having a magnitude of 20 μc are placed at the vertices of an equilateral triangle (30 cm on a side). what is the magnitude of the electrostatic force on the negative charge

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration