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A scaffold of mass 57 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. A window washer of mass 79 kg stands at a point 1.9 m from one end.
(a) What is the tension in the cable closer to the painter?
(b) What is the tension in the cable further from the painter?
Kaitlynne is using a magnifying glass (f = 0.098 m) while trying to solder a computer circuit board. find the distance between the glass and the circuit board
A lens produces a magnification of -1.8 when an object is placed 2.5 cm from the lens. compute the focal length of the lens?
Points A, B, and C are at the corners of an equilateral triangle of side 5 m. Equal positive charges of 5 µC are at A and B, What is the potential at point C
A 218.3 kg satellite is in a circular orbit of 26,273 miles (42,300,000 m) in radius. What is the velocity (speed) of the satellite
A 52dB sound wave strikes an eardrum whose area is 5.0×10?5m^2. How much energy is received by the eardrum per second
A hoop of mass 1.9 kg and radius 55 cm has a string wrapped around its circumference and lies flat on a horizontal frictionless table. What is the angular velocity of the hoop about its center of mass after 2 s
A 4.80 long, 600 steel beams extends horizontally from point where it has been bolted to the framework of a new building under construction. A 75 construction worker stands at the far end of beam.
In creating his definition of horsepower, James Watt, the inventor of the steam engine, calculated the power output of a horse operating a mill to grind grain or cut wood, Calculate the power output, in hp, of a 72-kg human being
A 50 kg block and a 100kg block are connected by string. the pulley is frictionless and of negligible mass. the coefficient of kinetic friction between the 50kg block and incline is 0.250. find the change in the kinetic energy of the 50kg block as..
how much energy is lost through a window with a 1x2m^2 larg, 3 mm thick glass sheet, if temperature difference between outside
Explain how would the results have differed in this experiment if the pulley and of the track was lower that the other end of the track?
The rotor of an electric motor has rotational inertia Im = 5.12 x 10-3 kg·m2 about its central axis.Calculate the number of revolutions of the rotor required to turn the probe through 31.3° about its central axis
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