When ice melts, it changes from solid to liquid. explain why this is not a chemical change.
a)
because water can also boil.
b)
because water is a compound and not a chemical.
c)
because it does not matter how much ice you use.
d)
because the chemical composition of water has not changed.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.