for this question there are 2 ways to solve this question i solved it one way but there is another way to solve it i have the answersof the second way which are 280kN and 560kN and 109.6 east of north. i just need help setting it up the second way. A pair of tugboats are attempting to tow the disabled Pequod back to shore. One tugboat pulls in a direction 28.1◦west of north with twice the force of the second tugboat. The resulting force on the Pequod is 400 kN north. Find the (a) magnitude of force each tugboat exerts and (b) the direction for the second tugboat’s force.

Which best represents the law of conservation of mass ?

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?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?