From a distance of 26 meters away, a person notices the sun just disappearing behind the ooftop of a tall building. assume the person is observing from ground level. a) assuming the sun at the time was at an altitude of 68° above the horizon, what is the height of the building? b) a little while later, the same person observes the building's shadow has reached a length of 54 meters. what is the altitude of the sun above the horizon at this time?

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

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Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?