Physics, 11.10.2019 13:50 daquanmcqueen77
Radioactive isotopes are used to treat cancer true or false
Answers: 2
Physics, 22.06.2019 05:00
Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?
Answers: 1
Physics, 22.06.2019 08:00
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?
Answers: 2
Physics, 22.06.2019 22:30
The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s
Answers: 2
Radioactive isotopes are used to treat cancer true or false...
History, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Biology, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01
Mathematics, 13.09.2020 23:01