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A laser that produces a spot of light that is 1.20 mm in diameter is shone perpendicularly on the center of a thin, perfectly reflecting circular (2 mm in diameter) aluminium plate mounted vertically on a flat piece of cork that floats on the surface of the water in a large beaker. The mass of this "sailboat" is 0.20 g, and it travels 2.2 mm in 60.0 s. assuming that the laser power is constant in the region where the sailboat is located through its motion, what is the power of the laser? (Neglect air resistance and the viscosity of water.)
A uniform 1.80m ladder of mass 6.30kg is leaning against a vertical wall while making an angle of 53.0%u2218 with the floor. How much work did this person do against gravity
a bicycle has wheels with a 30-centimeter radius. if smaller wheels with a 25-centimeter radius are installed what is
A 0.060 kg tennis ball, moving with a speed of 5.50 m/s, has a head-on collision with a 0.090 kg ball initially moving in the same direction at a speed of 3.00 m/s
a parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 3.90 and whose
Obler's paradox presented the contrary facts that the universe had to be infinite and uniform in order to be stable and if the universe was infinite the night sky should be as bright the surface of the stars. How was the paradox resolved?
The brightest star in the night skyis Sirius, which is at a distance of 8.30×1016 m. how far back in time are we seeingit
In the rectangle in the drawing, a charge is to be placed atthe empty corner to make the net force on the charge at cornerA point along the vertical direction
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. Find the overall magnification of the microscope
a 0.151 glider is moving to the right on a frictionless horizontal air track with a speed of 0.860 . it has a head-on
Two balls are rolled off the tabletop that is 0.75m above the floor. how far does each ball travel horizontally before hitting the floor
A 0.350kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750m/s when it makes a head-on collision with a stationary 0.150kg glider. Find the final kinetic energy of second glider
When resistors 1 and 2 are connected in series, the equivalent resistance is 19.7 ?. When they are connected in parallel, the equivalent resistance is 3.96 ?. What are the larger resistance of these two resistors
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