How are chemical and physical changes different on a molecular level? chemical changes involve the breaking of bonds in molecules. chemical changes do not affect bonding between atoms. physical changes do not involve molecules. physical changes cause new molecules to form.

The plum pudding model of the atom state that ?

What are the three ways that an object can accelerate

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.