which of the following is are neutral atoms of carbon and which are isotopes of carbon? (carbon has an atomic number of 6 and an atomic mass of 12)

a. neutral: a isotope: b and c

b. neutral: b isotope: a and c

c. neutral: c isotope: a and b

d. neutral: a and c isotope: b

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?