The local newspaper has published the passage below. last week, scientists released incredible images of aurora australis as seen from the hubble telescope. the hubble telescope was placed in orbit in 1990 by the space shuttle and has since delivered the sharpest images we have of our planet, our galaxy, and the universe. the images delivered last week show the beautiful display of lights all over the equator. these lights are the result of the solar activity known as solar wind. traces of solar wind reach well beyond earth and have been detected as far as saturn. which statement in the news passage above is inaccurate? the aurora australis cannot be seen from space. the hubble telescope does not orbit our planet. the aurora australis do not occur over the equator. solar winds do not reach well beyond our planet.

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?

In a good thermo flask the main cause of heat loss is

What part of the ear is names after tools, such as the hammer and the anvil?