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A 7.0 kg box is raised from rest adistance of 1.0 m by a vertical forceof 120 N.
(a) Find the work done by the force.
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(b) Find the work done by gravity.
(c) Find the final kinetic energy of the box.
A point source of light is 40.0 cm below the surface of a swimming pool (for water, n=1.333). Find the diameter of the largest circle
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You have a string with a mass of 0.0129 kg. You stretch the string with a force of 9.67 N, giving it a length of 1.95 m. What is the wavelength of the standing wave you create in the string
A 0.800 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1875 J and at its highest point is 211.2 m above the launch point. find the vertical component of its velocity just after launch
Find the magnitude of the gravitational force a 63.9 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 10^24 kg and a radius of 6.37 × 10^6 m.
A hollow, conducting spherical shell, of radius 3.50 cm, has charge ?9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere, What is the direction of the field
question a diffraction pattern forms when light passes through a single slit. the wavelength of the light is 665 nm.
A portable electric heater uses 14 Amp of current. What is the smallest radius of copper wire that can be used in the extension cord
mug down the counter for a refill. The height of the counter is h. The mug slides off the counter and strikes the floor at distance d from the base of the counter. With what velocity did the mug leave the counter
Thermal expansion increases the length of a clock's pendulum by a fractional increase of 4.9×10-5. Under these conditions, how much error in timekeeping accumulates over 1 day
A massless plank of length L = 2 m has two supports. One support is at the left end and one is in the middle. What is the normal force on the middle support
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