1. an electromagnetic wave in a vacuum has a wavelength of 0.07 m. what is its frequency?
f = 3.0 • 108 m/s
f = 4.3 • 109 hz
f = 3.0 • 109 hz
f = 4.3 • 108 m/s
2. which of the following occurs as light travels farther from its source?
far from the source, photons come together in a small area.
the intensity of light increases as photons move away from the source.
the source gives off less light as photons move away from it.
far from the source, photons spread over a larger area.
3. infrared rays have a shorter wavelength than
ultraviolet rays.
x-rays.
rad

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

1. the materials manager for a billiard ball maker must periodically place orders for resin, one of the raw materials used in producing billiard balls. she knows that manufacturing uses resin at a rate of 50 kilograms each day, and that it costs $.04 per day to carry a kilogram of resin in inventory. she also knows that the order costs for resin are $100 per order, and that the lead time for delivery is four (4) days.2. at what point should resin be reordered? a. 0 kilograms remainingb. 50 kilograms remainingc. 200 kilograms remainingd. 400 kilograms remaininge. 500 kilograms remaining3. if order size was 1,000 kilograms of resin, what would be the length of an order cycle? a. 0.05 daysb. 4 daysc. 16 daysd. 20 dayse. 50 days4. if the order size was 1,000 kilograms of resin, what would be the average inventory level? a. 50 kilogramsb. 200 kilogramsc. 500 kilogramsd. 800 kilogramse. 1,000 kilograms5. if the order size was 1,000 kilograms of resin, what would be the daily total inventory costs, excluding the cost of the resin? a. $5b. $10c. $20d. $25e. $40

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to