Physics, 05.12.2019 23:31, jameslinimk
The spring in a retractable ballpoint pen is 1.8 cm long, with a 260 n/m spring constant. when the pen is retracted, the spring is compressed by 1.0 mm. when you click the button to extend the pen, you compress the spring by an additional 6.0 mm.
how much energy is required to extend the pen?
Answers: 1
Physics, 21.06.2019 23:10, theh301234
6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.
Answers: 2
Physics, 22.06.2019 13:30, kuddlebugsmommy
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
The spring in a retractable ballpoint pen is 1.8 cm long, with a 260 n/m spring constant. when the p...
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