1.1 A change where the mass number of atoms and number of molecules remains the same with only the change in the arrangement of particles is
A Molecular change
B Chemical change
C Physical change
D Atomic change

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

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

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.