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A 2 kg box is raised from rest a distance of 3 m by a vertical force of 110 N.
(a) Find the work done by the force.
(b) Find the work done by gravity.
(c) Find the final kinetic energy of the box.
Compute the value that the spring constant should have so that passengers undergo an acceleration of no more than 7.0 when brought to rest. Let be the total mass of the elevator and passengers.
Describe the unique behavior of water (thermal expansion and specific heat capacity) that make it essential for life on Earth. 5-8 sentences
As observed from Earth, the wavelength of Hβ in the spectrum of the star Megrez in the Big Dipper is 486.112 nm. Laboratory measurements demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or mo..
A lever uses an effort arm of 4.75 m and has a resistance arm of 21.5 cm. What is the mechanical advantage of the lever
A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. find the magnitude of the centripetal acceleration of the stone
Start from the expression of the electric filed outside an infinite sheet of uniform surface charge density, E=sigma/2epsilon, derive the electric field
A scaffold of mass 44 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
three identical light bulbs, 24 ohm each, are connected in parallel with one another. find the equivalent resistance of the three light bulbs
Neglect air resistance, as well as any energy absorbed by the pole, and clarify her altitude as she crosses the bar.
A spherical conducting shell has an interior radius of 18 cm and an outer radius of 21cm. The shell carries a net charge of -2.4 micro coulombs. A point charge of charge +6.4 micro coulombs is placed at the center of spherical shell.
compute the coefficient of kinetic friction between block A and the tabletop.
A 1.0cm * 1.0cm parallel-plate capacitor has a 2.0mm spacing. The electric field strength inside the capacitor is 1.3*10^5 V/m, What is the potential difference across the capacitor
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