circular conducting loop of wire has a radius of 5.0 cm and a resistance of 60 :. Perpendicular to the plane of the loop is a uniform magnetic field of strength 7.5 T. This field is then reduced to zero over time. How long (in seconds) should it take the field to reduce to zero, if we want the induced current in the loop to be 0.005 A

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?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

By what primary heat transfer mechanism does the sun warm the earth?