A) calculate the frequency of light having a wavelength in vacuum of 5.89 x 10^-7 m. b) determine the velocity of this light and its wavelength in water (n = 1.33) and crown glass (n = 1.50)

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?