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A 55 kg engineer leaves her office on the 33rd floor of askyscraper and takes an elevator to the 59th floor. Later shedescends to street level. If the engineer takes her office as thezero for potential energy and if the distance from one floor to thenext is 3.5 m, what is the engineer's potential energy
(a) in her office,
(b) on the 59th floor, and
(c) at street level?
A 23 kg boom of length 6 m is supported by a cable that has a breaking tension of 1200N. The cable is perpendicular to the boom and is attached 4.5m from the pivot. What is the utmost load that can be suspended from the end of the boom.
a car is traveling on a straight road. the maximum velocity that can be attained by the car is 24 ms. the maximum
Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis
A 5.0 megawatt windmill has three 45 m-long blades that can be approximately viewed as straight rods. If the rotational speed of the rods is 6 rpm, what is the mass of each rod
What is the final temperature of the water?
question1which of the follow describes possible scenarios?a an object has zero instantaneous velocity and non-zero
A spring-loaded gun, fired vertically, shoots a marble 9.2 straight up in the air. What is the marble's range if it is fired horizontally from 2.3 above the ground
A flat sheet of crystalline quartz has a thickness of 1.6 cm. It is on top of the flat sheet of diamond that has a thickness of 2.10 cm. Light strikes the crystalline quartz perpendicularly and travels through it and then throughout the diamond.
A child in a boat throws a 5.20 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 40kg.
A diffraction grating produces an interference pattern on a wall. How many lines per meter does the grating have
A spherically symmetric object with a density of 1.57g/cm3 and a radius of 16.5cm is falling. Assuming is has a drag coefficient of 378g/s, what is the magnitude of terminal velocity
A baton twirler is twirling her baton in a horizontal circle at a rate of 3.35 revolutions per second. Calculate the induced EMF between the center and one end of the baton
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