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A 75.0 weight watcher wishes to climb a mountain to work off the equivalent of a larger piece of chocolate cake rated 500(food)calories . how high must the person climb
An outside loudspeaker (considered a small source) emits sound waves with a power output of 125 W. (a) Find the intensity 12.5 m from the source. ______W/m2 (b) Find the intensity level in decibels at that distance.
The position of a hydrogen atom (m=1.7x10-27) isknown to within 2.0x10-6m. What is the minimumuncertainy in the atom's velocity
Write an explanation of how you can predict the motion of a charged hockey puck that is moved by other charged pucks. How negative and positive charges compare and contrast
A 120-V rms voltage at 1000 Hz is applied to a series LRC circuit with an equal value of inductive and capacitive reactance and a 200-? resistance. What is the impedance of this circuit
A point charge q1=4nC is placed at the origin, and a second point charge q2= -3nC is placed on the x-axis at x= 20 cm. A third point charge q3=2.00 nC is to be placed on the x-axis between q1 and q2.
Consider a parallel-plate capacitor with an area of 0.9 cm2, with a plate spacing of0.19 mm, and filled with quartz. At what voltage will this capacitor exhibit dielectric breakdown?
A metal hoop of mass 2.5 kg and with a radius of 0.5 m rolls smoothly without slipping along a floor with a velocity of 2 m/s. What is the maximum vertical height reached by the hoop
In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the following expression, Find the period and amplitude of the motion
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 54.35 diopters, what is the height of the image on her retina
A sphere of mass M is supported by a string that passes over a pulley at the end of a horizontal rod of length L, Find the mass of the portion of the string above the rod
A ladder of uniform density, length 4m and mass 20kg, makes an angle = 65 degrees with the horizontal and its upper end rests against a wall. What is the maximum mass that he can have such that the ladder will not slip when he reaches this point
in an eye that is farsighted the eye focuses parallel rays so that the image would form behind the retina. in an eye
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