Charges +3.0 μc and -6.0 μc are placed 5 cm from each other. find where the electric field equals 0 and where the electric potential is zero.

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Which of the following is a measure of the amount of light a star directly emits?               a.  luminosity    b.  intensity    c.  wavelength    d.  brightness

Abig box of sausages (30 kg) are lifted from the ground to the top shelf of the freezer. if the box is lifted at a constant speed, a distance of 1.75 m, what work is done by gravity?