Physics, 25.06.2019 20:30, gracetay3721
Acaptive james bond is strapped to a table beneath a huge pendulum made of a 3.0-m-diameter uniform circular metal blade rigidly attached, at its top edge, to a 5.5-m-long, massless rod. the pendulum is set swinging with a 10° amplitude when its lower edge is 3.8 m above the prisoner, then the table slowly starts ascending at 1.0 mm/s. after 25 minutes, the pendulum's amplitude has decreased to 7.0°. fortunately, the prisoner is freed with a mere 30 s to spare. what was the speed of the lower edge of the blade as it passed over him for the last time?
Answers: 1
Physics, 21.06.2019 22:30, elijahdecent6070
Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter
Answers: 1
Physics, 22.06.2019 07:50, bckyanne3
2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it
Answers: 1
Physics, 22.06.2019 11:50, kaylallangari2145
Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?
Answers: 2
Acaptive james bond is strapped to a table beneath a huge pendulum made of a 3.0-m-diameter uniform...
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