Electronic transitions from the H2 molecule are easily seen at O X-ray wavelengths.
O infrared wavelengths
-visible wavelengths
O radio wavelengths.

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

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.