For isolated system: A. kinetic energy is always conserved B. gravitational potential energy is always conserved C. both kinetic energy and gravitational potential energy are always conserved D. total energy is always conserved E. total energy is conserved only if there is no friction

Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.

Which statement best describes how private industry decides where to spend the money on research and development

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m