What criteria might be used to establish someone as an expert witness

What happens to the mass of the substance when undergoing a physical change

Two tanks (Tank A and Tank B) are separated by a partition. Initially Tank A contains 2 kg of steam at 1 MPa and 300°C while Tank B contains 3 kg of saturated liquid-vapor mixture at 150°C with a vapor mass fraction of 50 percent.

The ability to do work is called what?

Which of the following would result in a chemical change

An ambitious hiker walks 25 km west and then 35 km south in a day. find the magnitude and direction of the hikers resultant displacement (relative to due west).

The density of uranium is 18.8 g/cm3. part a what is this value in kilograms per cubic meter?

What name is given to the variable we plot on the x-axis? A. The dependent variable B. The independent variable c. The linear variable D. The inverse variable

What force is required to accelerate a body with the mass of 15 kilograms at a rate of 8m/s2?

Indicate whether the statement is true or false. A scientific fact is something that is absolute and unchanging.

Show the formula and caculate the speed of a car that traveled 100 km in 2 hours