Which best summarizes a concept related to the work-energy theorem? When work is positive, the environment does work on an object. When work is negative, the environment does work on an object. When work is positive, the kinetic energy in a system remains constant. When work is negative, the kinetic energy in a system remains constant.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass