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When an 81.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 1.60 x 103 J. By how much does the potential energy of a(n) 20.5-kg child increase when the child climbs a normal staircase to the second floor?
An electron is traveling through a region of space in which the electric field is along the +x direction and has a magnitude of 2313 N/C. What is the acceleration of the electron? magnitude m/s2 direction
Suppose the peak of a particular star's spectrum occurs at about 6000 Å (Angstrom). (a) Use Wien's law to calculate the star's surface temperature. (b) If this star were a factor of four hotter, at what wavelength would its spectrum peak? In what ..
In a hydraulic lift, the maximum gauge pressure is 18.5 atm. If the diameter of the output line is 18.7 cm, what is the heaviest vehicle that can be lifted
a golfer imparts a speed of 37.1 ms to a ball and it travels the maximum possible distance before landing on the green.
Water flows over a waterfall 10 meters to a turbine. Water flows at a rate of 10kg/sec. How much power is delivered to the turbine
Three identical point charges (q1=q2=q3=5.0 nc) are located at three corners of a square with 1.0 cm each side, find the potential energy U of the electron
A 3-ft-diameter semicircular channel made of unfinished concrete is to transport water to a distance of 1-m uniformly. determine the minimum elevation difference across the channel
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 18.0 cm, Find the electric field just outside the paint layer
Radioactive isotopes often occur together in mixtures. Suppose a 290g sample contains 131Ba, with a half-life of 12 days, and 47Ca, with a half-life of 4.5 days.
two point charges are on the y-axis. a 5.0 microc charge is located at y 1.15 cm and a -2.32 microc charge is located
A particle with charge of 4 microcoloumbs is at the origin,another identical particle is placed 2 m from the origin on thepositive x-axis and another 2 m on the positive y-axis.
A rotating door is made from four rectangular glass panes, as shown in the drawing. find the magnitude of the door's angular acceleration
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