On a circular area of ​​1.78cm in diameter a magnetic flux with a value of 0.19x10 ^ 3Wb indices perpendicularly. What magnetic field passes through it?

In what direction does the medium move relative to the direction of the wave? explain.

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.

If element x has 99 protons how many electrons does it have