Which of these is a mixture? calcium carbon dioxide salt water potassium

As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Which of the following is an example of motion in two dimensions?