Electromagnetic waves, which include light, consist of vibrations of electric and magnetic fields, and they all travel at the speed of light.

a.) fm radio. find the wavelength of an fm radio station signal broadcasting at a frequency of 102.5 mhz .
b.) x rays. x rays have a wavelength of about 0.200 nm . what is their frequency?
c.) the big bang. microwaves with a wavelength of 1.20 mm , left over from soon after the big bang, have been detected. what is their frequency?
d.) sunburn. sunburn (and skin cancer) are caused by ultraviolet light waves having a frequency of around 1.04×1016 hz . what is their wavelength?
e.) seti. it has been suggested that extraterrestrial civilizations (if they exist) might try to communicate by using electromagnetic waves having the same frequency as that given off by the spin flip of the electron in hydrogen, which is 1.42 ghz . to what wavelength should we tune our telescopes in order to search for such signals?
f.) microwave ovens. microwave ovens cook food with electromagnetic waves of frequency around 2.45 ghz . what wavelength do these waves have?

Will a heavier bowling ball hit pins better than a lighter bsll

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program