Why is density used to determine the identity of matter?

Identify an energy diagram showing the energy of the reaction as a function of the progress of the reaction.

A gas sample has a volume of 0.225 L with an unknown temperature. The same gas has a volume of 0.180 L when the temperature is 35 ∘C, with no change in the pressure or amount of gas.

What kind of field does a direct current produce?

What causes some objects' motion to change?

What is the highest temperature ever recorded on earth

The first law of thermodynamics states that ΔE = Q - W. Is this also a statement of the principle of conservation of energy? Yes, the heat added and the change in internal energy of the gas equal the work done by the piston.

How can we calculate the density of a sustance that has irregular volume

A two stage rocket leaves its launch pad moving vertically with an average acceleration of 4 m/s2. at 10 s after launch the first stage of the rocket (now without fuel) is released.

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?