‏إذا حتى الأولى 10 كيلو متر والثانية 10 كيلو متر وكانت الزاوية بينهم 40 فما أقدر ما حصلتها

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

Which of these metals are magnetic?